Chemistry – An Asian Journal

Cover image for Vol. 9 Issue 8

Early View (Online Version of Record published before inclusion in an issue)

Editor: Theresa Kueckmann

Impact Factor: 3.935

ISI Journal Citation Reports © Ranking: 2013: 32/148 (Chemistry Multidisciplinary)

Online ISSN: 1861-471X

Associated Title(s): Angewandte Chemie International Edition, Asian Journal of Organic Chemistry, Chemistry - A European Journal, Chinese Journal of Chemistry, Journal of the Chinese Chemical Society, The Chemical Record

VIEW

  1. 1 - 91
  1. Communications

    1. Nanostructures

      Facile and Scalable Synthesis of Silicon-Based Nanocomposites with Slitlike Nanopores: A Solid-State Exfoliation Reaction Using Layered CaSi2

      Dr. Song-Yul Oh, Dr. Haruo Imagawa and Dr. Hiroshi Itahara

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402544

      Thumbnail image of graphical abstract

      Eat your nano-Wheaties! A solid-state exfoliation reaction yields silicon-based nanocomposites with slitlike nanopores. The formation of CaCl2 promotes the extraction of Ca from CaSi2, thereby exfoliating the layered structure to give nanoflake particles. The simple, versatile procedure opens up a pathway to energy-related functional nanomaterials such as secondary batteries and photovoltaics.

  2. Full Papers

    1. Helical Structures

      Controlled Dynamic Helicity of a Folded Macrocycle Based on a Bisterephthalamide with a Twofold Z-Shaped Structure

      Dr. Ryo Katoono, Keiichi Kusaka, Prof. Dr. Kenshu Fujiwara and Prof. Dr. Takanori Suzuki

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402658

      Thumbnail image of graphical abstract

      Strong signals: As a signaling host, we prepared a helically folded macrocycle with two flexible units: a terephthalamide unit and a Z-shaped unit, which present some interconvertible pairs of enantiomeric forms (dynamic helicity) in the macrocycle. The helical preference was controlled by a transmission of chirality to give strong CD signals in a complexed state (see figure).

  3. Communications

    1. Electrochromism

      Dimeric Tetrathiafulvalene Linked to pseudo-ortho-[2.2]Paracyclophane: Chiral Electrochromic Properties and Use as a Chiral Dopant

      Kosuke Kobayakawa, Dr. Masashi Hasegawa, Hiroaki Sasaki, Junta Endo, Dr. Hideyo Matsuzawa, Dr. Katsuya Sako, Dr. Jun Yoshida and Dr. Yasuhiro Mazaki

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402667

      Thumbnail image of graphical abstract

      Chiral electrochromic properties: The synthesis and electrochromic (EC) chiroptical properties of chiral pseudo-ortho-[2.2]paracyclophane with tetrathiafulvalene units are reported. They exhibited pronounced EC properties in various redox states. Each enantiomer was examined as a chiral dopant for nematic liquid crystals (LCs), and the induced helicity of the LC solvent was in accord with the molecular chirality.

    2. Helical Structures

      Chirality Control of Quadruple Helixes of Metal Strings by Peripheral Chiral Ligands

      Chung-Han Yu, Min-Shiang Kuo, Ching-Yi Chuang, Gene-Hsiang Lee, Shao-An Hua, Prof. Bih-Yaw Jin and Prof. Dr. Shie-Ming Peng

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402823

      Thumbnail image of graphical abstract

      Let’s twist again! Chirality control of helixes with the Δ or Λ form is interesting in various fields such as extended metal atom chains (EMACs), in which ligands helically warp the metal backbones. We report two EMACs (see picture) whose chiralities are controlled by chiral ligands with camphorsulfonyl groups.

  4. Full Papers

    1. Energy Transfer

      Efficient Red Electroluminescent Devices with Sterically Hindered Phosphorescent Platinum(II) Schiff Base Complexes and Iridium Complex Codopant

      Dr. Liang Zhou, Chun-Lam Kwong, Dr. Chi-Chung Kwok, Dr. Gang Cheng, Prof. Hongjie Zhang and Prof. Chi-Ming Che

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402618

      Thumbnail image of graphical abstract

      Seeing red: Red-light-emitting platinum(II) Schiff base complexes with bulky groups are described. This enhanced bulkiness mitigates self-quenching. Codoping of wide band gap iridium(III) complexes into the electron dominant light-emitting layer results in efficient red electroluminescent devices with slow efficiency roll-off (see figure).

    2. Polyoxometalates

      Visible-Light-Induced Water Oxidation Mediated by a Mononuclear-Cobalt(II)-Substituted Silicotungstate

      Rui Xiang, Prof. Dr. Yong Ding and Prof. Dr. Junwei Zhao

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402483

      Thumbnail image of graphical abstract

      Go mono: A mononuclear-cobalt(II)-substituted dimeric silicotungstate was found to act as an efficient water-oxidation catalyst (see figure). Its stability was thoroughly investigated by multiple experiments.

    3. Cathode Materials

      Preparation of a Reduced Graphene Oxide Wrapped Lithium-Rich Cathode Material by Self-Assembly

      Sung Nam Lim, Dr. Wook Ahn, Dr. Sun-Hwa Yeon and Prof. Seung Bin Park

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402517

      Thumbnail image of graphical abstract

      Li on the GO: A Li-rich cathode material wrapped in sheets of reduced graphene oxide (RGO) is prepared by self-assembly. In the presence of RGO on the cathode material, the Li-rich cathode shows a capacity of 124 mA h g−1 at 2000 mA g−1 in comparison to 82 mAh g−1 for the bare cathode. The cycle performance is also enhanced from 56 to 81 % after 90 cycles. PDDA=polydiallyldimethylammonium chloride.

    4. Block Copolymers

      Synthesis and Self-Assembly of Thermoresponsive Amphiphilic Biodegradable Polypeptide/Poly(ethyl ethylene phosphate) Block Copolymers

      Qiuhua Wu, Dan Zhou, Renyu Kang, Xiuping Tang, Qi Yang, Ximing Song and Guolin Zhang

      Article first published online: 21 AUG 2014 | DOI: 10.1002/asia.201402524

      Thumbnail image of graphical abstract

      Hanging with my PEEPs: New thermoresponsive amphiphilic biodegradable poly(γ-benzyl L-glutamate)/poly(ethyl ethylene phosphate) (PBLG-b-PEEP) block copolymers were synthesized. The lower critical solution temperature (LCST) of these polymers can be controlled by their concentrations (see figure). Their thermoresponsivity under physiological conditions is effective for drug delivery or tissue engineering applications.

    5. Amides

      Acid-Promoted Chemoselective Introduction of Amide Functionality onto Aromatic Compounds Mediated by an Isocyanate Cation Generated from Carbamate

      Akinari Sumita, Hiroaki Kurouchi, Prof. Dr. Yuko Otani and Prof. Dr. Tomohiko Ohwada

      Article first published online: 19 AUG 2014 | DOI: 10.1002/asia.201402625

      Thumbnail image of graphical abstract

      Direct aromatic amidation: Facile generation of an isocyanate cation from carbamates with ortho-salicylate promotes an intermolecular reaction of isocyanate cation with a stoichiometric amount of arene at room temperature, even in the presence of other electrophilic functionalities. The difference in reactivity between N-monosubstituted carbamate and N,N-disubstituted carbamates can be used to obtain secondary and tertiary amides with different arenes (see figure).

    6. Nanostructures

      Hierarchical Self-Assembly of Supramolecular Hydrophobic Metallacycles into Ordered Nanostructures

      Jing Zhang, Dr. Riccardo Marega, Li-Jun Chen, Nai-Wei Wu, Xing-Dong Xu, Prof. Dr. David C. Muddiman, Prof. Dr. Davide Bonifazi and Prof. Dr. Hai-Bo Yang

      Article first published online: 19 AUG 2014 | DOI: 10.1002/asia.201402410

      Thumbnail image of graphical abstract

      Step by step: The hierarchical self-assembly of supramolecular metallacycles, which were prepared by the combination of 120° hydrophobic dipyridyl 1 with 60, 120, or 180° di-PtII acceptor 2, 3, or 4, respectively, into ordered fibers or spherical particles through multiple noncovalent interactions is described (see figure).

  5. Communications

    1. Metal Nanoparticles | Very Important Paper

      Carboxylated Pillar[5]arene-Coated Gold Nanoparticles with Chemical Stability and Enzyme-like Activity

      Dr. Chiyoung Park, Eun Sun Jeong, Kyung Joo Lee, Prof. Dr. Hoi Ri Moon and Prof. Dr. Kyoung Taek Kim

      Article first published online: 14 AUG 2014 | DOI: 10.1002/asia.201402574

      Thumbnail image of graphical abstract

      All wrapped up! A multidentate macrocycle, carboxylated pillar[5]arene (CP), can stabilize gold nanoparticles (AuNPs) in various conditions in which citrate-stabilized AuNPs are not stable. In addition, CP-coated AuNPs exhibit greater peroxidase-like activity than citrate-stabilized AuNPs in the presence of silver cations.

  6. Full Papers

    1. Cyclization

      Asymmetric Michael Addition/Intramolecular Cyclization Catalyzed by Bifunctional Tertiary Amine–Squaramides: Construction of Chiral 2-Amino-4H-chromene-3-Carbonitrile Derivatives

      Yu Gao and Prof. Dr. Da-Ming Du

      Article first published online: 14 AUG 2014 | DOI: 10.1002/asia.201402567

      Thumbnail image of graphical abstract

      Fair and square: The efficient asymmetric Michael addition/intramolecular cyclization of malononitrile with dienones catalyzed by a chiral bifunctional tertiary amine–squaramide catalyst for the synthesis of chiral 2-amino-4H-chromene-3-carbonitrile derivatives is developed. The corresponding products are obtained in good to excellent yields (up to 99 %) with excellent enantioselectivities (up to 98 % ee) for most of the bisarylidenecyclopentanones.

    2. Silylation

      Activator-Free Palladium-Catalyzed Silylation of Aryl Chlorides with Silylsilatranes

      Yutaro Yamamoto, Prof. Dr. Hiroshi Matsubara, Dr. Kei Murakami, Prof. Dr. Hideki Yorimitsu and Prof. Dr. Atsuhiro Osuka

      Article first published online: 14 AUG 2014 | DOI: 10.1002/asia.201402595

      Thumbnail image of graphical abstract

      A Si of relief: The Pd-catalyzed silylation of aryl chlorides with silylsilatranes proceeds under activator-free conditions and hence displays wide functional group compatibility and allows boryl and siloxy groups to survive. The chloride on palladium is revealed to play an important role in transmetalation from the silylsilatrane to the arylpalladium chloride through strong interaction between the Lewis acidic silicon and the chloride.

    3. Luminescence

      Mechanochromic Luminescence of Fluorenyl-Substituted Ethylenes

      Yun Lv, Prof. Dr. Yang Liu, Dan Guo, Xin Ye, Guangfeng Liu and Prof. Dr. Xutang Tao

      Article first published online: 14 AUG 2014 | DOI: 10.1002/asia.201402627

      Thumbnail image of graphical abstract

      A glowing report: A series of fluorenyl-containing tetrasubstituted ethylenes show morphology-dependent luminescence. Their emission color can be switched between green and blue by means of mechanical grinding and solvent fuming. The transformation between crystalline and amorphous accounts for the luminescence changing (see figure).

    4. Multicomponent Reactions

      One-Pot Consecutive Catalysis by Integrating Organometallic Catalysis with Organocatalysis

      Samaresh Chandra Sau, Dr. Sudipta Raha Roy and Dr. Swadhin K. Mandal

      Article first published online: 14 AUG 2014 | DOI: 10.1002/asia.201402363

      Thumbnail image of graphical abstract

      One thing led to another… Organometallic catalysis and organocatalysis are integrated in the same reaction pot, starting with an abnormal N-heterocyclic carbene based copper catalyst. This catalyst acts as an efficient catalyst for a click reaction to provide a triazole, which acts as an efficient organocatalyst for different organic transformations in a consecutive fashion in the same reaction pot (see figure).

  7. Communications

    1. Total Synthesis

      Total Syntheses of Lycoposerramine-V and 5-epi-Lycoposerramine-V

      Lan-De Zhang, Ting-Ting Zhou, Sen-Xing Qi, Jie Xi, Dr. Xiao-Liang Yang and Prof. Dr. Zhu-Jun Yao

      Article first published online: 13 AUG 2014 | DOI: 10.1002/asia.201402614

      Thumbnail image of graphical abstract

      Two for the price of 1: Enantioselective total syntheses of lycoposerramine-V (1) and 5-epi-lycoposerramine-V (2); these syntheses feature an application of a scalable desymmetrization reaction, chemoselective functionalization of the bis-Weinreb-amide precursor 6 with Grignard additions, construction of the fully functionalized cyclohexanone 4 a with an intramolecular Michael addition, and stereocontrolled elaboration of the chiral piperdine moiety.

    2. Upconversion

      Impact of High Ytterbium(III) Concentration in the Shell on Upconversion Luminescence of Core–Shell Nanocrystals

      Lei Lei, Prof. Daqin Chen, Wenjuan Zhu, Ju Xu and Prof. Yuansheng Wang

      Article first published online: 12 AUG 2014 | DOI: 10.1002/asia.201402610

      Thumbnail image of graphical abstract

      Coating coatings: When 20 Yb/2 Er:NaGdF4 core nanocrystals are coated with a NaYbF4 shell, upconversion emission intensity decreases. In a core@shell@shell sandwich-like structure, high Yb3+ concentration in the shell promotes deleterious back energy transfer from Er3+ in the core to Yb3+ in the shell and energy transfer from Yb3+ in the core to Yb3+ in the shell.

  8. Full Papers

    1. Template Synthesis

      Metallogel Template Fabrication of pH-Responsive Copolymer Nanowires Loaded with Silver Nanoparticles and Their Photocatalytic Degradation of Methylene Blue

      Dr. Xing Wen, Prof. Liming Tang and Dr. Botian Li

      Article first published online: 11 AUG 2014 | DOI: 10.1002/asia.201402575

      Thumbnail image of graphical abstract

      Get in there! The preparation of pH-responsive copolymer nanowires loaded with silver nanoparticles, with core–shell structures, by metallogel template copolymerization and subsequent reduction of the silver ions instead of template removal is described (see picture). These core–shell structures can effectively catalyze the photodegradation of methylene blue and exhibit high photostability under UV irradiation.

    2. Noncovalent Interactions

      Large and Fast Single-Crystal Resistive Humidity Sensitivity of Metal Pnictide Halides Containing van der Waals Host–Guest Interactions

      Dr. Xiao-Ming Jiang, Dr. Zhi-Bo Yan, Dr. Dan Liu, Dr. Ke-Feng Wang, Prof. Guo-Cong Guo, Dr. Shao-Zhen Li and Prof. Jun-Ming Liu

      Article first published online: 8 AUG 2014 | DOI: 10.1002/asia.201402572

      Thumbnail image of graphical abstract

      Designing detectors: Two new inorganic complexes, (Hg9.75As5.5)(GaCl4)3 and (Hg13Sb8)(ZnBr4)4, containing weak van der Waals host–guest interactions have been prepared by solid-state reactions. Both complexes exhibit good single-crystal humidity sensitivity, with a humidity sensitivity factor as large as three orders of magnitude, a quick resistance response, fast recovery, and good reproducibility (see picture).

    3. Donor–Acceptor Systems

      Effect of Extended π-Conjugation Structure of Donor–Acceptor Conjugated Copolymers on the Photoelectronic Properties

      Meng Wang, Shaowei Shi, Di Ma, Keli Shi, Chen Gao, Liwei Wang, Gui Yu, Yongfang Li, Xiaoyu Li and Haiqiao Wang

      Article first published online: 8 AUG 2014 | DOI: 10.1002/asia.201402564

      Thumbnail image of graphical abstract

      Oriented to perform: New donor–acceptor conjugated copolymers based on alkylthienylbenzodithiophene (BDTT) and alkoxynaphthodithiophene (NDT) have been synthesized and compared with their benzo[1,2-b:4,5-b′]dithiophene (BDT)-based analogues to investigate the effect of the extended π conjugation of the polymer main chain on the physicochemical properties of the polymers.

    4. Host–Guest Systems

      Designed Synthesis of a Highly Conjugated Hexaethynylbenzene-Based Host for Supramolecular Architectures

      Dr. Yongjun Li, Liang Xu, Dr. Sharon Lai-Fung Chan, Prof. Yuliang Li, Runsheng Jiang, Prof. Huibiao Liu and Prof. Chi-Ming Che

      Article first published online: 8 AUG 2014 | DOI: 10.1002/asia.201402500

      Thumbnail image of graphical abstract

      In our cups: The construction of efficient synthetic functional receptors with tunable cavities is started from hexaethynylbenzene (see figure). Self-organization of guest molecules within these cavities was realized through cooperative noncovalent interactions and precise control over the topology of the interacting species. Electron transfer offers opportunities for tuning the optical and electronic properties of the molecular cup and encapsulated guest.

    5. Supramolecular Chemistry

      Self-Assembly of Pyridinium-Tailored Anthracene Amphiphiles into Supramolecular Hydrogels

      Peiyi Wang, Dr. Jun Hu, Prof. Song Yang, Prof. Baoan Song and Prof. Qian Wang

      Article first published online: 5 AUG 2014 | DOI: 10.1002/asia.201402590

      Thumbnail image of graphical abstract

      Tailor made: The mixing of a polyacid cross-linker with a pyridinium-functionalized anthracene amphiphile afforded a supramolecular hydrogel through a self-assembly process that was primarily driven by π-stacking and electrostatic interactions.

    6. Drug Delivery

      Core–Shell Hollow Microspheres of Magnetic Iron Oxide@Amorphous Calcium Phosphate: Synthesis Using Adenosine 5′-Triphosphate and Application in pH-Responsive Drug Delivery

      Dr. Bing-Qiang Lu, Prof. Dr. Ying-Jie Zhu, Feng Chen, Chao Qi, Xin-Yu Zhao and Jing Zhao

      Article first published online: 5 AUG 2014 | DOI: 10.1002/asia.201402319

      Thumbnail image of graphical abstract

      Stimuli-responsive drug nanocarriers: Core–shell hollow microspheres of magnetic iron oxide@amorphous calcium phosphate (MIO@ACP) were prepared and investigated as drug-delivery systems. Hollow microspheres were prepared by HCl etching of solid microspheres, loaded with drugs, and coated with a protective layer of ACP by using disodium adenosine 5′-triphosphate (ATP) as the stabilizer. At pH 4.5 drug release was fast due to dissolution of the ACP shell.

    7. Electrochemistry

      One-Step Hydrothermal Synthesis of Nitrogen-Doped Carbon Nanotubes as an Efficient Electrocatalyst for Oxygen Reduction Reactions

      Dr. Lisong Chen, Dr. Xiangzhi Cui, Dr. Yongxia Wang, Min Wang, Dr. Fangming Cui, Dr. Chenyang Wei, Dr. Weimin Huang, Dr. Zile Hua, Dr. Lingxia Zhang and Prof. Jianlin Shi

      Article first published online: 5 AUG 2014 | DOI: 10.1002/asia.201402334

      Thumbnail image of graphical abstract

      Adding some spice! Nitrogen-doped carbon nanotubes (CNTs) with a relatively low amount of nitrogen doping, but high oxygen reduction activity, have been synthesized by a facile one-step approach (see picture). The efficiency results from the graphical structure and other characteristics inherited from CNTs, which is the prominent advantage of this approach.

    8. Mesoporous Materials

      Hierarchical Activated Mesoporous Phenolic-Resin-Based Carbons for Supercapacitors

      Zhao Wang, Dr. Min Zhou, Hao Chen, Dr. Jingui Jiang and Prof. Dr. Shiyou Guan

      Article first published online: 5 AUG 2014 | DOI: 10.1002/asia.201402338

      Thumbnail image of graphical abstract

      Meso soup: Hierarchical activated mesoporous carbons (AMCs) through KOH activation of highly ordered, body-centered cubic mesoporous phenolic-resin-based carbon (C-FDU-16), exhibited outstanding electrochemical capacitive performance, including high specific capacitance, excellent rate capability, and good cycling stability, owing to the large effective specific surface area and an optimized micro-mesoporous structure.

    9. Chromophores

      Unprecedented Sensitization of Visible and Near-Infrared Lanthanide Luminescence by Using a Tetrathiafulvalene-Based Chromophore

      Min Feng, Dr. Fabrice Pointillart, Dr. Boris Le Guennic, Bertrand Lefeuvre, Dr. Stéphane Golhen, Dr. Olivier Cador, Dr. Olivier Maury and Dr. Lahcène Ouahab

      Article first published online: 1 AUG 2014 | DOI: 10.1002/asia.201402385

      Thumbnail image of graphical abstract

      Multi Emissions: The multi-emitting tetrathiafulvalene-substituted 2,6-di(pyrazol-1-yl)-4-pyridine (dpp) ligand (L) acts as an efficient organic chromophore for near-infrared and also, for the first time, for visible lanthanide luminescence (see figure).

  9. Communications

    1. Sensors

      Ultrasensitive Fluorescence Polarization Aptasensors Based on Exonuclease Signal Amplification and Polystyrene Nanoparticle Amplification

      Dr. Yong Huang, Xiaoqian Liu, Ming Shi, Prof. Shulin Zhao, Dr. Kun Hu, Prof. Zhen-Feng Chen and Prof. Hong Liang

      Article first published online: 31 JUL 2014 | DOI: 10.1002/asia.201402563

      Thumbnail image of graphical abstract

      Being somewhat polarizing: The combination of T7 exonuclease signal amplification and polystyrene nanoparticle amplification is exploited to design novel, highly sensitive and specific fluorescence polarization aptasensors. This approach holds promise as a generic platform for the development of amplified aptasensors for detecting target molecules.

    2. Photocatalysis

      Efficient Noble-Metal-Free γ-Fe2O3@NiO Core–Shell Nanostructured Photocatalysts for Water Oxidation

      Xiaoqiang Du, Jie Wei, Jinli Zhao, Ruixin Han and Prof. Yong Ding

      Article first published online: 31 JUL 2014 | DOI: 10.1002/asia.201402652

      Thumbnail image of graphical abstract

      Water stones: γ-Fe2O3@NiO core–shell nanostructures exhibited superior catalytic performance in the photocatalytic oxidation of water with Na2S2O8 as a sacrificial electron acceptor and [Ru(bpy)3](ClO4)2 as a photosensitizer.

  10. Full Papers

    1. Nanostructures

      Electrochemically Controlled Growth of Au[BOND]Pt Alloy Nanowires and Nanodendrites

      Xiaojun Yi, Prof. Gang Yu, Fangfang Chang, Zhi Hui Xie, Tan Nhat Tran, Prof. Bo Nian Hu and Prof. Chuan-Jian Zhong

      Article first published online: 31 JUL 2014 | DOI: 10.1002/asia.201402442

      Thumbnail image of graphical abstract

      A mechanical mind: This work reveals new mechanistic insights into the electrochemically controlled growth of Au[BOND]Pt alloy nanowires and nanodendrites with controllable composition, size, morphology, and phase structures (see figure). The origin of the branching growth and the control of the alloy phase structures are demonstrated for the first time.

    2. Supramolecular Chemistry

      Supramolecular Phosphatases Formed by the Self-Assembly of the Bis(Zn2+–Cyclen) Complex, Copper(II), and Barbital Derivatives in Water

      Dr. Mohd Zulkefeli, Dr. Yosuke Hisamatsu, Asami Suzuki, Yuya Miyazawa, Dr. Motoo Shiro and Prof. Dr. Shin Aoki

      Article first published online: 30 JUL 2014 | DOI: 10.1002/asia.201402513

      Thumbnail image of graphical abstract

      Bar brawl: A 2:2:2 supramolecule based on the self-assembly of Zn2L1 and Cu2+ with barbital (Bar) has a Cu2(μ-OH)2 core and accelerates the hydrolysis of mono(4-nitrophenyl)phosphate (see scheme). Bar units with hydroxyl groups on their side chains for use in the formation of 2:2:2 supramolecules with functional groups near the Cu2(μ-OH)2 core were also prepared.

    3. Chromophores

      Synthesis, Structure, Photoluminescence, and Electroluminescence of Siloles that Contain Planar Fluorescent Chromophores

      Bin Chen, Yibin Jiang, Bairong He, Dr. Jian Zhou, Dr. Herman H. Y. Sung, Prof. Ian D. Williams, Dr. Ping Lu, Prof. Hoi Sing Kwok, Prof. Huayu Qiu, Prof. Zujin Zhao and Prof. Ben Zhong Tang

      Article first published online: 30 JUL 2014 | DOI: 10.1002/asia.201402468

      Thumbnail image of graphical abstract

      Trains, planes, and automobiles: The impact of planar fluorescent chromophores at the 2,5-positions of silole rings on the aggregation-induced emission characteristics and electroluminescence properties of the siloles has been investigated.

    4. Coordination Polymers

      Catalytic Glucose Isomerization by Porous Coordination Polymers with Open Metal Sites

      George Akiyama, Dr. Ryotaro Matsuda, Dr. Hiroshi Sato and Prof. Dr. Susumu Kitagawa

      Article first published online: 30 JUL 2014 | DOI: 10.1002/asia.201402119

      Thumbnail image of graphical abstract

      Sugar, ah, honey, honey: Highly efficient catalytic isomerization reactions from glucose to fructose in aqueous media are presented by using porous coordination polymers (PCPs)/metal–organic frameworks (MOFs). Further, the materials are also applicable to catalytic one-pot conversion of amylose to fructose using a functionalized PCP with [BOND]SO3H groups, thanks to the high stability of the framework in an acidic solution.

    5. Anode Materials

      Freeze-Drying-Assisted Synthesis of Hierarchically Porous Carbon/Germanium Hybrid for High-Efficiency Lithium-Ion Batteries

      Dr. Ying Xiao and Prof. Minhua Cao

      Article first published online: 28 JUL 2014 | DOI: 10.1002/asia.201402549

      Thumbnail image of graphical abstract

      Being part of a hierarchy: A porous C/Ge hybrid with a hierarchical micropore–mesopore structure has been synthesized. When used as an anode material in lithium-ion batteries, the hybrid exhibits a high capacity and excellent rate capability.

    6. Self-Assembly

      Chiral Carbonaceous Nanotubes Containing Twisted Carbonaceous Nanoribbons, Prepared by the Carbonization of Chiral Organic Self-Assemblies

      Hongjing Huo, Prof. Yi Li, Yuan Yuan, Shuwei Lin, Prof. Baozong Li, Prof. Mingliang Wang and Prof. Yonggang Yang

      Article first published online: 28 JUL 2014 | DOI: 10.1002/asia.201402569

      Thumbnail image of graphical abstract

      Let′s twist again! Single-handed helical carbonaceous nanotubes containing twisted carbonaceous nanoribbons were prepared by the carbonization of chiral organic self-assemblies within the silica nanotubes (see figure). Circular dichroism spectra indicated that the nanotubes exhibited optical activity. The circular dichroism signals were proposed to originate from the chiral stacking of aromatic rings.

    7. Silanes

      Copper(I)-Catalyzed Regioselective Addition of Nucleophilic Silicon Across Terminal and Internal Carbon–Carbon Triple Bonds

      Dr. Chinmoy K. Hazra, Carolin Fopp and Prof. Dr. Martin Oestreich

      Article first published online: 25 JUL 2014 | DOI: 10.1002/asia.201402643

      Thumbnail image of graphical abstract

      Dissolving regiochemical issues: A simple catalyst system allows for the regioselective addition of a catalytically generated, silicon-based cuprate across terminal and internal alkynes. The choice of the solvent emerged as crucial for achieving high regiocontrol with the differently substituted triple bonds (see scheme).

    8. Lithium-Ion Batteries

      Flame Spray Pyrolysis for Finding Multicomponent Nanomaterials with Superior Electrochemical Properties in the CoOx-FeOx System for Use in Lithium-Ion Batteries

      Jung Hyun Kim, Prof. Jong-Heun Lee and Prof. Yun Chan Kang

      Article first published online: 25 JUL 2014 | DOI: 10.1002/asia.201402508

      Thumbnail image of graphical abstract

      Having a hot temper(ature): High-temperature flame spray pyrolysis is employed for finding highly efficient nanomaterials for use in lithium-ion batteries. Multicomponent CoOx-FeOx powders with Co/Fe mole ratio of 2:1 and a mixed crystal structure with Co3O4 and CoFe2O4 phases show high initial capacities and good cycling performance.

  11. Communications

    1. C[BOND]H Activation

      Copper-Promoted Site-Selective Acyloxylation of Unactivated C(sp3)[BOND]H Bonds

      Dr. Xuesong Wu, Yan Zhao and Prof. Dr. Haibo Ge

      Article first published online: 24 JUL 2014 | DOI: 10.1002/asia.201402510

      Thumbnail image of graphical abstract

      Getting promoted: The site-selective acyloxylation of aliphatic amides was achieved via a copper-promoted C(sp3)[BOND]H bond functionalization process directed by a bidentate ligand. The reaction showed a great preference for activating C[BOND]H bonds of β-methyl groups over those of γ-methyl and unactivated methylene groups.

  12. Full Papers

    1. Supramolecular Chemistry

      Thermodriven Micrometer-Scale Aqueous-Phase Separation of Amphiphilic Oligoethylene Glycol Analogues

      Shunichi Kawasaki, Dr. Takahiro Muraoka, Haruki Obara, Takerou Ishii, Prof. Tsutomu Hamada and Prof. Kazushi Kinbara

      Article first published online: 23 JUL 2014 | DOI: 10.1002/asia.201402134

      Thumbnail image of graphical abstract

      Now you see them… Thermodriven micrometer-scale aqueous phase separation of amphiphilic monodisperse oligoethylene glycol analogues with aromatic units is reported. Microscopic observations reveal hysteretic aggregate formation and disassembly processes (see picture). As an application of this thermodriven phase separation, the extraction of aromatic and hydrophobic peptides has been successfully demonstrated.

    2. Energy Transfer

      Through-Space Conjugated Molecular Wire Comprising Three π-Electron Systems

      Prof. Dr. Yasuhiro Morisaki, Naoya Kawakami, Shotaro Shibata and Prof. Dr. Yoshiki Chujo

      Article first published online: 23 JUL 2014 | DOI: 10.1002/asia.201402653

      Thumbnail image of graphical abstract

      A journey through space: A [2.2]paracyclophane-based through-space conjugated oligomer comprising three π-electron systems was synthesized. This oligomer exhibited efficient unidirectional and stepwise energy transfer through the stacked π-electron systems.

    3. Nanoparticles

      Photo- and pH-Tunable Multicolor Fluorescent Nanoparticle-Based Spiropyran- and BODIPY-Conjugated Polymer with Graphene Oxide

      Shazid Md. Sharker, Chan Jin Jeong, Sung Min Kim, Jung-Eun Lee, Prof. Ji Hoon Jeong, Prof. Insik In, Prof. Haeshin Lee and Prof. Sung Young Park

      Article first published online: 23 JUL 2014 | DOI: 10.1002/asia.201402399

      Thumbnail image of graphical abstract

      Multicolor sensing: Reduced graphene oxide can be coupled with a polymer conjugated with photochromic spiropyran (SP) dye and hydrophobic boron dipyrromethane (BODIPY) dye to trigger multicolor bioimaging sequentially and simultaneously (see figure).

    4. Supramolecular Gels

      Pyrene-Based Fluorescent Supramolecular Hydrogel: Scaffold for Energy Transfer

      Subrata Mukherjee, Tanmoy Kar and Prof. Prasanta Kumar Das

      Article first published online: 23 JUL 2014 | DOI: 10.1002/asia.201402358

      Thumbnail image of graphical abstract

      Self-assembled gelation: A pyrene-containing, low molecular weight gelator (see figure) shows high gelation efficiency for the formation of supramolecular fluorescent gels with notable mechanical strength. The presence of only 0.00075 % w/v of acridine orange resulted in about 50 % quenching of the fluorescence intensity of the gel (yellow spectrum) through efficient fluorescence resonance energy transfer to the hosted fluorophore (red spectrum).

    5. Biosensors

      A Mix-and-Read Fluorescence Strategy for the Switch-On Probing of Kinase Activity Based on an Aptameric-Peptide/Graphene-Oxide Platform

      Chunyang Lei, Dr. Xiahong Xu, Jiang Zhou, Xin Liu, Prof. Dr. Zhou Nie, Meng Qing, Pei Li, Dr. Yan Huang and Prof. Shouzhuo Yao

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402221

      Thumbnail image of graphical abstract

      Star mix: A simple, rapid strategy for probing kinase activity, based on an aptameric-peptide/graphene-oxide platform, offers high sensitivity and good selectivity. This method allows kinase activity in cell lysate to be assayed within 15 min.

    6. Hydrogenation

      Hydrogenation of Imines Catalyzed by Trisphosphine-Substituted Molybdenum and Tungsten Nitrosyl Hydrides and Co-Catalytic Acid

      Dr. Subrata Chakraborty, Dr. Olivier Blacque, Dr. Thomas Fox and Prof. Heinz Berke

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402280

      Thumbnail image of graphical abstract

      It′s important to stay active: Low-valent M(0)(NO)(CO)H(etpip) {M=Mo, 2 a(syn); W=2 b(syn), etpip=(iPr2PCH2CH2)2PPh)} complexes are active catalysts in the presence of [H(Et2O)2][B(C6F5)4] co-catalytic mixture in the hydrogenation of various para-substituted imines to their corresponding amines. An “ionic” mechanism with heterolytic splitting of H2 is proposed followed by “proton before hydride” H-atom transfers.

  13. Focus Reviews

    1. Gold Catalysis

      Meeting the Challenge of Intermolecular Gold(I)-Catalyzed Cycloadditions of Alkynes and Allenes

      Dr. Michael E. Muratore, Anna Homs, Carla Obradors and Prof. Antonio M. Echavarren

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402395

      Thumbnail image of graphical abstract

      Golden addition: The development of gold(I)-catalyzed intermolecular carbo- and hetero-cycloadditions of alkynes and allenes has been more challenging than their intramolecular counterparts. Here, with a mechanistic perspective, the most fundamental intermolecular cycloadditions of alkynes and allenes with alkenes are reviewed.

    2. Photocatalysis

      Direct Photocatalysis for Organic Synthesis by Using Plasmonic-Metal Nanoparticles Irradiated with Visible Light

      Qi Xiao, Prof. Dr. Esa Jaatinen and Prof. Dr. Huaiyong Zhu

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402310

      Thumbnail image of graphical abstract

      Making changes with visible light: Recent developments in the direct photocatalysis of plasmonic-metal nanoparticles are described, with a focus on the role of the localized surface plasmon resonance (LSPR) effect in plasmonic metals and their applications in organic transformations (see figure). The role of light irradiation in the catalyzed reactions and the light-excited energetic electron reaction mechanisms will be highlighted.

  14. Full Papers

    1. Capacitors

      Facile In Situ Synthesis of Hierarchical Porous Ni/Ni(OH)2 Hybrid Sponges with Excellent Electrochemical Energy-Storage Performances for Supercapacitors

      Wanren Wang, Wenhua Wang, Dr. Mengjiao Wang and Prof. Dr. Xiaohui Guo

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402369

      Thumbnail image of graphical abstract

      On the ropes: A unique sponge-like hybrid electrode material was generated by the in situ growth of porous Ni(OH)2 rope-like structures on a Ni support. The as-prepared Ni/Ni(OH)2 hybrid electrode exhibited ultrahigh specific capacitances and good rate-capability in electrochemical capacitors.

    2. Alkaloids

      Collective Synthesis of 4-Hydroxy-2-pyridone Alkaloids and Their Antiproliferation Activities

      Feiqing Ding, Min Li Leow, Dr. Jimei Ma, Ronny William, Hongze Liao and Prof. Dr. Xue-Wei Liu

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402466

      Thumbnail image of graphical abstract

      Easy as A, B, C, D: A collective total synthesis of 4-hydroxy-2-pyridone alkaloids—specifically, pretenellin B, prebassianin B, farinosone A, militarione D, pyridovericin, and torrubiellone C—has been achieved (see scheme). This approach might contribute to the synthesis of bioactive small-molecule libraries as well as drug discovery.

    3. Heterocycles

      Reactions of Cycloaliphatic Thioketones and Their Oxo Analogues with Lithiated Methoxyallene: A New Approach to Vinylthiiranes

      Dr. Marcin Jasiński, Prof. Grzegorz Mlostoń, Michał Stolarski, Wilhelmine Costa, Dr. Moises Domínguez and Prof. Hans-Ulrich Reissig

      Article first published online: 22 JUL 2014 | DOI: 10.1002/asia.201402547

      Thumbnail image of graphical abstract

      Alkoxyallenes and thiones: Lithiated methoxyallene was tested in reactions with a series of cycloaliphatic thioketones yielding unique vinylthiiranes. In contrast to ketones, the initially formed allenyl thiols underwent spontaneous 1,3- or 1,5-cyclizations, depending on the substitution pattern of the precursor thione. Desulfurization of a selected adamantanethione-derived vinylthiirane led to an electron-rich diene used in cycloaddition.

  15. Communications

    1. Single-Chain Magnets

      Two Trihydrazine-Bridged Cobalt(II) Chain Compounds Exhibiting Antiferromagnetic Ordering and Single-Chain Magnetic Behavior

      Dr. Li-Hui Jia, Yan-Jun Wang, Chen Gao, Dr. Mei Ding, Dr. Jun-Hua Jia, Prof. Bing-Wu Wang and Prof. Song Gao

      Article first published online: 17 JUL 2014 | DOI: 10.1002/asia.201402448

      Thumbnail image of graphical abstract

      Bridge over (troubled) cobalt: Two new trihydrazine-bridged [Co(N2H4)3]2+ chain compounds have been synthesized and magnetically characterized. One exhibits low-dimensional ordering behavior and the other behaves as a single-chain magnet (SCM) at low temperatures.

  16. Full Papers

    1. Donor–Acceptor Systems

      Acid–Base-Responsive Intense Charge-Transfer Emission in Donor–Acceptor-Conjugated Fluorophores

      Dr. Toshifumi Inouchi, Dr. Takuya Nakashima and Prof. Tsuyoshi Kawai

      Article first published online: 16 JUL 2014 | DOI: 10.1002/asia.201402463

      Thumbnail image of graphical abstract

      Opposites attract interest: Donor–acceptor molecules composed of an arylthienothiophene and an acid-responsive benzimidazole unit showed intense charge-transfer emission with a quinoidal character on protonation. Acid–base-sensitive triple-color emission (see figure) was achieved by introducing a base-responsive phenol unit in the donor part.

  17. Communications

    1. Charge Transfer

      Novel Coronene–Naphthalene Dimide-Based Donor–Acceptor Pair for Tunable Charge-Transfer Nanostructures

      Mohit Kumar and Dr. Subi J. George

      Article first published online: 16 JUL 2014 | DOI: 10.1002/asia.201402426

      Thumbnail image of graphical abstract

      We come as a pair: A novel donor (D)–acceptor (A) pair consisting of coronene and naphthalenediimide is presented that forms an alternately stacked D-A charge-transfer complex, wherein the strength and supramolecular ordering has been systematically engineered.

  18. Full Papers

    1. Bioinorganic Chemistry

      Iron(III) Catecholates for Cellular Imaging and Photocytotoxicity in Red Light

      Uttara Basu, Ila Pant, Dr. Imran Khan, Dr. Akhtar Hussain, Prof. Paturu Kondaiah and Prof. Akhil R. Chakravarty

      Article first published online: 14 JUL 2014 | DOI: 10.1002/asia.201402207

      Thumbnail image of graphical abstract

      Light and dark: Unprecedented photocytotoxicity of FeIII catecholates of dipicolylamines with a pendant anthracenyl/pyrenyl fluorophore in red light is described. The complexes showed preferential nuclear localization and apoptotic cell death upon photoirradiation to form reactive oxygen species (ROS; see figure). The dark toxicity was significantly lower. The complexes showed photocleavage of DNA in red light to form hydroxyl radicals.

    2. Total Synthesis

      Synthesis of Pyrrolophenanthridine Alkaloids Based on C(sp3)[BOND]H and C(sp2)[BOND]H Functionalization Reactions

      Dr. Chihiro Tsukano, Nobusuke Muto, Iderbat Enkhtaivan and Prof. Yoshiji Takemoto

      Article first published online: 14 JUL 2014 | DOI: 10.1002/asia.201402490

      Thumbnail image of graphical abstract

      Ring expansion: The alkaloids assoanine (1), pratosine (2), hippadine (3), and dehydroanhydrolycorine (4), which belong to the pyrrolophenanthridine family of alkaloids, have been successfully synthesized by using C[BOND]H activation chemistry. The tetracyclic skeletons are constructed in a stepwise manner by C(sp3)[BOND]H functionalization and a Catellani reaction involving C(sp2)[BOND]H functionalization.

  19. Communications

    1. Organocatalysis

      Remote Sulfonamido Group Enhances Reactivity and Selectivity for Asymmetric Michael Addition of Nitroalkanes to α,β-Unsaturated Aldehydes

      Yu-Chao Huang and Prof. Biing-Jiun Uang

      Article first published online: 14 JUL 2014 | DOI: 10.1002/asia.201402516

      Thumbnail image of graphical abstract

      Two birds with one stone: The pyrrolidine–camphorsulfonamide-based catalyst 1 a catalyzes the enantioselective conjugate addition of nitroalkanes to α,β-unsaturated aldehydes in the presence of 5 equivalents of water in iPrOH to give the corresponding chiral Michael adducts in good yields and high enantioselectivities (up to 99 % ee) with catalyst loading as low as 1 mol %.

  20. Full Papers

    1. Solar Cells

      Development of New Two-Dimensional Small Molecules Based on Benzodifuran for Efficient Organic Solar Cells

      Zhengkun Du, Yanhua Chen, Dr. Weichao Chen, Dr. Shanlin Qiao, Dr. Shuguang Wen, Qian Liu, Dangqiang Zhu, Prof. Mingliang Sun and Prof. Renqiang Yang

      Article first published online: 13 JUL 2014 | DOI: 10.1002/asia.201402467

      Thumbnail image of graphical abstract

      An organic small molecule based on a 2D substituted benzodifuran unit is designed and synthesized. A solution-processed small-molecule organic solar cell based on this molecule and [6,6]-phenyl-C61-butyric acid methyl ester is prepared. It shows promising power conversion efficiency (PCE) and a high fill factor (FF) after thermal annealing at a relatively low temperature (only 70 °C). VOC=open-circuit voltage, JSC=short-circuit current.

    2. Fullerenes

      Diels–Alder Reaction on Free C68 Fullerene and Endohedral Sc3N@C68 Fullerene Violating the Isolated Pentagon Rule: Importance of Pentagon Adjacency

      Dr. Tao Yang, Prof. Dr. Xiang Zhao, Prof. Dr. Shigeru Nagase and Prof. Dr. Takeshi Akasaka

      Article first published online: 13 JUL 2014 | DOI: 10.1002/asia.201402435

      Thumbnail image of graphical abstract

      Union is better than separation: Density functional theory calculations on the Diels–Alder reaction of free C68 fullerene and endohedral Sc3N@C68 fullerene reveal that the C[BOND]C bonds around the united pentagons exhibit the highest chemical reactivity, whether the endohedral metallic cluster exists or not. o-Quinodimethane is demonstrated to be a good candidate for purifying and functionalizing endohedral fullerenes.

    3. Macrocycles

      Construction of Pendant-Armed Schiff-Base Macrocyclic Dinuclear Zinc Complexes and Their Selective Recognition of Acetate Ions

      Kun Zhang, Chao Jin, Hui-Qing Chen, Gui Yin and Prof. Wei Huang

      Article first published online: 13 JUL 2014 | DOI: 10.1002/asia.201402357

      Thumbnail image of graphical abstract

      Long arm of the law: Two flexible extended dialdehydes with different functional pendant arms have been designed and synthesized to produce two 42-membered folded [2+2] macrocyclic dinuclear ZnII complexes with 1,2-bis(2-aminoethoxy)ethane. These complexes exhibited selective recognition of acetate ions, as verified by changes in their UV/Vis and MS (ESI) spectra and even changes visible to the naked eye.

  21. Communications

    1. Sensors

      Aliphatic Amine Discrimination by Pentafluorophenyl Dibromo BODIPY

      Adiki Raja Sekhar, Masood Ayoub Kaloo and Prof. Dr. Jeyaraman Sankar

      Article first published online: 13 JUL 2014 | DOI: 10.1002/asia.201402389

      Thumbnail image of graphical abstract

      Degrees of connection: Two new fluorescent BODIPY dyes (Ra and Rb) have been designed and synthesized. Their selective reactivity towards an Ar-SN2 reaction has been explored as a potential basis for colorimetric and fluorescent discrimination of primary, secondary, and tertiary aliphatic amines. This dual-mode, instantaneous recognition event is unprecedented.

  22. Full Papers

    1. Materials Science

      Amphiphilic Janus Gold Nanoparticles Prepared by Interface-Directed Self-Assembly: Synthesis and Self-Assembly

      Guannan Liu, Dr. Jia Tian, Dr. Xu Zhang and Prof. Hanying Zhao

      Article first published online: 8 JUL 2014 | DOI: 10.1002/asia.201402379

      Thumbnail image of graphical abstract

      Two-faced: Polystyrene colloidal particles with gold nanoparticles (AuNPs) on the surfaces were prepared by self-assembly of AuNPs. The colloidal particles were used as templates for the synthesis of Janus AuNPs. After surface-initiated atom-transfer radical polymerization (ATRP; see picture), Janus AuNPs with two different polymer brushes on two hemispheres were obtained.

    2. Supported Catalysts

      Bimetallic NiCo Functional Graphene: An Efficient Catalyst for Hydrogen-Storage Properties of MgH2

      Ying Wang, Guang Liu, Cuihua An, Li Li, Fangyuan Qiu, Prof. Yijing Wang, Lifang Jiao and Prof. Huatang Yuan

      Article first published online: 8 JUL 2014 | DOI: 10.1002/asia.201402245

      Thumbnail image of graphical abstract

      Two in one: Bimetallic NiCo functional reduced graphene oxide (rGO) was synthesized by a one-pot method. Experimental results demonstrate that NiCo nanoparticles (NPs) and rGO have synergetic effects on the hydrogen-storage properties of MgH2 (see figure). The as-synthesized NiCo/rGO hybrids can effectively decrease the operating temperature and improve the sorption kinetics of MgH2.

  23. Communications

    1. Endrohedral Fullerenes

      New Trifluoromethylated Derivatives of Metal Nitride Clusterfullerenes: Sc3N@Ih-C80(CF3)14 and Sc3N@D5h-C80(CF3)16

      Tao Wei, Dr. Nadezhda B. Tamm, Prof. Dr. Shangfeng Yang and Prof. Dr. Sergey I. Troyanov

      Article first published online: 8 JUL 2014 | DOI: 10.1002/asia.201402573

      Thumbnail image of graphical abstract

      Interesting structural relations exist between CF3 derivatives of both Sc3N@D5h-C80 and Sc3N@Ih-C80: Triple-hexagon-junction-added CF3 groups are present in all Sc3N@C80(CF3)14,16 compounds, and the Sc3N cluster is fixed inside the C80 cage. Sc3N@D5h-C80(CF3)16 (picture) is a precursor of the known Sc3N@D5h-C80(CF3)18. Seven Sc3N@Ih-C80(CF3)14 isomers form two subfamilies with different relative positions of CF3 groups and the Sc3N cluster.

  24. Full Papers

    1. Inhibitors

      Stabilization of Human Telomeric G-Quadruplex and Inhibition of Telomerase Activity by Propeller-Shaped Trinuclear PtII Complexes

      Cui-Xia Xu, Yong Shen, Qian Hu, Yu-Xuan Zheng, Qian Cao, Prof. Peter Z. Qin, Prof. Yong Zhao, Prof. Liang-Nian Ji and Prof. Zong-Wan Mao

      Article first published online: 3 JUL 2014 | DOI: 10.1002/asia.201402258

      Thumbnail image of graphical abstract

      Planar or nonplanar? Two new propeller-shaped flexible trinuclear PtII complexes were synthesized and their ability to act as selective G-quadruplex binders and strong telomerase inhibitors are reported (see figure).

    2. Solar Cells

      Efficient Diketopyrrolopyrrole-Based Small-Molecule Bulk-Heterojunction Solar Cells with Different Electron-Donating End-Groups

      Yu Jin Kim, Jang Yeol Back, Seul-Ong Kim, Chan-Woo Jeon, Prof. Chan Eon Park and Prof. Yun-Hi Kim

      Article first published online: 2 JUL 2014 | DOI: 10.1002/asia.201402223

      Thumbnail image of graphical abstract

      End of the road: Three new small molecules with identical π-spacers (acetylene), a central diketopyrrolopyrrole (DPP) unit, and different aromatic electron-donating end-groups (DPP-A-Ph, DPP-A-Na, and DPP-A-An) showed broad absorptions, low HOMO levels, and high hole mobilities. Solution-processed organic solar cells based on DPP-A-An showed power-conversion efficiencies as high as 3.93 %.

  25. Focus Reviews

    1. Synthetic Methods

      1,4-Dihydropyrrolo[3,2-b]pyrrole and Its π-Expanded Analogues

      Dr. Anita Janiga and Prof. Daniel T. Gryko

      Article first published online: 2 JUL 2014 | DOI: 10.1002/asia.201402367

      Thumbnail image of graphical abstract

      Rediscovering old friends: Although indolo[3,2-b]indoles (see picture) have been known for 130 years, their parent 1,4-dihydropyrrolo[3,2-b]pyrroles emerged in the 1970s and have only recently become easily accessible. Their synthesis, reactivity, and properties are exhaustively presented. OK

  26. Communications

    1. C[BOND]H Activation

      Regioselective C3 Alkenylation of 4 H-pyrido[1,2-a]pyrimidin-4-ones via Palladium-Catalyzed C[BOND]H Activation

      Dr. Wenjie Liu, Dr. Shaohua Wang, Qi Zhang, Jingwen Yu, Jiahe Li, Zhiwei Xie and Prof. Hua Cao

      Article first published online: 2 JUL 2014 | DOI: 10.1002/asia.201402455

      Thumbnail image of graphical abstract

      Active ingredient: A new efficient method for the direct alkenylation of 4H-pyrido[1,2-a]pyrimidin-4-ones via palladium-catalyzed C[BOND]H bond activation has been developed. This transformation presents a useful approach to functionalize 4H-pyrido[1,2-a]pyrimidin-4-ones, which are privileged structures in many bioactive molecules and versatile synthetic blocks.

    2. Carbonylation

      Pd/Cu-Cocatalyzed Aerobic Oxidative Carbonylative Homocoupling of Arylboronic Acids and CO: A Highly Selective Approach to Diaryl Ketones

      Long Ren and Prof. Ning Jiao

      Article first published online: 2 JUL 2014 | DOI: 10.1002/asia.201402326

      Thumbnail image of graphical abstract

      As simple as that: A highly selective Pd/Cu cocatalyzed aerobic oxidative carbonylative homocoupling of arylboronic acids has been developed. This method employs a simple catalytic system, readily available boronic acids as the substrates, molecular oxygen as the oxidant, and a simple CO/O2 atmosphere, which makes this method practical for further applications.

    3. Photocatalysis

      De Novo Synthesis of Imidazoles by Visible-Light-Induced Photocatalytic Aerobic Oxidation/[3+2] Cycloaddition/Aromatization Cascade

      Qiao-Hui Deng, You-Quan Zou, Dr. Liang-Qiu Lu, Prof. Dr. Zi-Long Tang, Dr. Jia-Rong Chen and Prof. Dr. Wen-Jing Xiao

      Article first published online: 1 JUL 2014 | DOI: 10.1002/asia.201402443

      Thumbnail image of graphical abstract

      A cascade of change: A visible-light-induced photocatalytic aerobic oxidation/[3+2] cycloaddition/aromatization cascade between secondary amines and isocyanides has been successfully developed. The reaction provides a general and efficient access to diversely substituted imidazoles and imidazo[1,5-a]quinoxalin-4(5 H)-ones in good yields under very mild conditions.

  27. Full Papers

    1. Photosynthesis

      Integration of [(Co(bpy)3]2+ Electron Mediator with Heterogeneous Photocatalysts for CO2 Conversion

      Jinliang Lin, Dr. Yidong Hou, Yun Zheng and Prof. Xinchen Wang

      Article first published online: 1 JUL 2014 | DOI: 10.1002/asia.201402303

      Thumbnail image of graphical abstract

      Increasingly reduced: Carbon dioxide reduction is enhanced by using semiconductor photocatalysts with an electron mediator [Co(bpy)3]2+ (bpy=2,2′-bipyridine; see picture). This hybrid photocatalytic system can be adapted with universal catalysts for CO2 reduction. The results represent an important step towards highly efficient photosynthesis by cheap and sustainable systems.

  28. Focus Reviews

    1. Photoactive Systems

      Modern Synthetic Tools Toward the Preparation of Sophisticated Phthalocyanine-Based Photoactive Systems

      Dr. Maria-Eleni Ragoussi and Prof. Tomás Torres

      Article first published online: 30 JUN 2014 | DOI: 10.1002/asia.201402311

      Thumbnail image of graphical abstract

      Transition (metal) concepts: Palladium-catalyzed cross-coupling reactions, “click” chemistry, ruthenium metathesis, and other transition-metal-mediated strategies have been employed towards the preparation of a wide range of sophisticated phthalocyanine-based photoactive architectures. The synthesis of a selection of key examples, representative in a number of optoelectronic applications, is described.

  29. Full Papers

    1. Nanocrystals

      Seed-Mediated Synthesis of Gold Tetrahedra in High Purity and with Tunable, Well-Controlled Sizes

      Yiqun Zheng, Wenying Liu, Tian Lv, Ming Luo, Dr. Hefei Hu, Dr. Ping Lu, Dr. Sang-Il Choi, Chao Zhang, Dr. Jing Tao, Prof. Yimei Zhu, Prof. Zhi-Yuan Li and Prof. Younan Xia

      Article first published online: 27 JUN 2014 | DOI: 10.1002/asia.201402499

      Thumbnail image of graphical abstract

      Nothing ever grows without a seed: Gold tetrahedra with well-controlled sizes in the range of 30–60 nm were synthesized in high yield using seed-mediated growth. We also monitored the evolution of shape from spherical seeds 10 nm in size to the tetrahedra. For the first time, Au nanocrystals with a tetrahedral shape could be obtained with an edge length as short as 30 nm.

  30. Communications

    1. Amorphous Materials

      Superior Supercapacitor Properties of Composite Powders with Amorphous NiO Nanoclusters Distributed Uniformly in an Amorphous Carbon Matrix

      Seung Ho Choi, Prof. Yun Chan Kang, Yun Ju Choi and Dr. Yang Soo Kim

      Article first published online: 24 JUN 2014 | DOI: 10.1002/asia.201402218

      Thumbnail image of graphical abstract

      Thin-skinned: An amorphous nickel oxide–carbon composite powder prepared by a facile spray-drying process was applied as a supercapacitor electrode material. The ultrathin carbon layers embedding the amorphous NiO nanoclusters resulted in an excellent supercapacitor property.

  31. Full Papers

    1. Conjugation

      Sumanenemonoone Imines Bridged by Redox-Active π-Conjugated Unit: Synthesis, Stepwise Coordination to Palladium(II), and Laser-Induced Formation of Nitrogen-Doped Graphitic Carbon

      Dr. Toru Amaya, Yuhi Inada, Yasutomo Shimizu, Dr. Akinori Saeki, Dr. Ryotaro Tsuji, Prof. Dr. Shu Seki and Prof. Dr. Toshikazu Hirao

      Article first published online: 24 JUN 2014 | DOI: 10.1002/asia.201402242

      Thumbnail image of graphical abstract

      Bridge over troubled sumanenes: Sumanenemonoone imine compounds bridged by a redox-active π-conjugated unit on the basis of the conversion between 1,4-phenylenediamine and 1,4-benzoquinonediimine are synthesized and characterized. Stepwise coordination of the imino groups to PdII is indicated. Laser irradiation of a film of the sumanenemonoone imine gives nitrogen-doped graphitic carbon, for which the N/C ratio is nearly retained.

  32. Communications

    1. Hydroboration

      Copper-Catalyzed Synthesis of 1,1-Diborylalkanes through Regioselective Dihydroboration of Terminal Alkynes

      Sumin Lee, Dingxi Li and Prof. Jaesook Yun

      Article first published online: 24 JUN 2014 | DOI: 10.1002/asia.201402458

      Thumbnail image of graphical abstract

      Copper on call: The copper-catalyzed sequential regioselective hydroboration of terminal alkynes with pinacolborane provided 1,1-diborylalkanes directly from alkynes. Protected propargyl amines, propargyl alcohol derivatives, and simple alkynes reacted to give the desired 1,1-diborylalkanes in good yields with a copper/xantphos catalyst.

  33. Full Papers

    1. Nanostructures

      Platinum and Palladium Nanotubes Based on Genetically Engineered Elastin–Mimetic Fusion Protein-Fiber Templates: Synthesis and Application in Lithium-O2 Batteries

      Guilue Guo, Thi Hong Anh Truong, Huiteng Tan, Huixiang Ang, Wenyu Zhang, Chen Xu, Xianghong Rui, Zhaolong Hu, Prof. Eileen Fong and Prof. Qingyu Yan

      Article first published online: 24 JUN 2014 | DOI: 10.1002/asia.201402191

      Thumbnail image of graphical abstract

      On a short fuse: Nanofibers of genetically engineered GPG-AG3 fusion proteins that contained both self-assembly and mineralization domains were prepared and applied as templates in the synthesis of 1D Pt and Pd nanostructures. Carbon-supported Pt and Pd nanotubes were obtained after mild (80 °C) hydrothermal treatment and subsequent annealing under a flow of argon at 300 °C. The obtained Pt and Pd nanotubes showed promise as catalysts in cathodes for lithium/O2 batteries.

    2. Supramolecular Gels

      Remarkable Shape-Sustaining, Load-Bearing, and Self-Healing Properties Displayed by a Supramolecular Gel Derived from a Bis-pyridyl-bis-amide of L-Phenyl Alanine

      Dr. Uttam Kumar Das, Dr. Subhabrata Banerjee and Dr. Parthasarathi Dastidar

      Article first published online: 24 JUN 2014 | DOI: 10.1002/asia.201402053

      Thumbnail image of graphical abstract

      Healing is a matter of time: A series of bis-amides derived from L-phenylalanine and L-alanine displayed moderate to good gelation ability with various solvents. Structure–property correlation using single-crystal and powder X-ray diffraction on selected gels was attempted. One of the gelator resulted in a gel with outstanding load-bearing and self-healing properties. The 1,2-dichlorobenzene gel of this gelator was so strong that letters could be carved into a thin slice of the gel.

    3. DNA Recognition

      Sequence-Specific DNA Alkylation by Tandem Py[BOND]Im Polyamide Conjugates

      Rhys Dylan Taylor, Yusuke Kawamoto, Kaori Hashiya, Dr. Toshikazu Bando and Prof. Dr. Hiroshi Sugiyama

      Article first published online: 18 JUN 2014 | DOI: 10.1002/asia.201402331

      Thumbnail image of graphical abstract

      Py[BOND]Im the sky: Tandem-hairpin N-methylpyrrole (Py)[BOND]N-methylimidazole (Im) polyamide seco-CBI conjugates were designed with various linker units and compared against hairpin Py[BOND]Im polyamides. High-resolution denaturing gel electrophoresis by using 205 base-pair (bp) DNA fragments was used to compare their alkylating reactivities and selectivities.

  34. Communications

    1. Amination

      Heterogeneously Porous γ-MnO2-Catalyzed Direct Oxidative Amination of Benzoxazole through C[BOND]H Activation in the Presence of O2

      Provas Pal, Arnab Kanti Giri, Harshvardhan Singh, Dr. Subhash Chandra Ghosh and Dr. Asit Baran Panda

      Article first published online: 16 JUN 2014 | DOI: 10.1002/asia.201402057

      Thumbnail image of graphical abstract

      Sorry for being so direct: The heterogeneously catalyzed direct amination of benzoxazole with a wide range of primary and secondary amines, using molecular oxygen as a green oxidant under mild reaction conditions, is reported. The catalyst can easily be separated by filtration and reused. The 2-aminobenzoxazole products are important skeletons in several biologically active compounds.

    2. Heterocycles

      Formal [4+2]-Annulation of Vinyl Azides with N-Unsaturated Aldimines

      Xu Zhu, Dr. Yi-Feng Wang, Feng-Lian Zhang and Prof. Shunsuke Chiba

      Article first published online: 16 JUN 2014 | DOI: 10.1002/asia.201402421

      Thumbnail image of graphical abstract

      Brought to you by the letter­ N: Highly functionalized quinolines and pyridines could be synthesized by BF3⋅OEt2-mediated reactions of vinyl azides with N-aryl and N-alkenyl aldimines, respectively. The reaction mechanism could be characterized as formal [4+2]-annulation, including unprecedented enamine-type nucleophilic attack of vinyl azides to aldimines with subsequent nucleophilic cyclization of the resulting imine intermediates.

    3. Isomerization

      Unprecedented Cobalt-Catalyzed Isomerization Reactions to Single Skipped 2,4,7-Trienes Applied in the Synthesis of Urushiol

      Anastasia Schmidt and Prof. Dr. Gerhard Hilt

      Article first published online: 11 JUN 2014 | DOI: 10.1002/asia.201402323

      Thumbnail image of graphical abstract

      My heart skipped, skipped a beat: The skipped 2,4,7-triene subunit of urushiol was generated from the 1,3,7-triene through a cobalt-catalyzed isomerization reaction in a stereoselective fashion. The double bond configuration of the double bond at position 7 remained unchanged whereas the 2Z,4E-configuration was controlled by the cobalt catalyst.

  35. Full Papers

    1. C[BOND]H Functionalization

      Palladium-Catalyzed Direct C2 Arylation of N-Substituted Indoles with 1-Aryltriazenes

      Can Liu, Tao Miao, Lei Zhang, Prof. Pinhua Li, Yicheng Zhang and Prof. Lei Wang

      Article first published online: 11 JUN 2014 | DOI: 10.1002/asia.201402274

      Thumbnail image of graphical abstract

      Seeing to C2: An efficient Pd-catalyzed C2 arylation of N-substituted indoles with 1-aryltriazenes for the synthesis of 2-arylindoles has been developed. In the presence of BF3OEt2 and palladium(II) acetate, N-substituted indoles reacted with 1-aryltriazenes in N,N-dimethylacetamide to afford the corresponding aryl–indole-type products in good to excellent yields.

  36. Communications

    1. Oxidative Coupling

      Ligand-Free Palladium-Catalyzed Aerobic Oxidative Coupling of Carboxylic Anhydrides with Arylboronic Acids

      Dr. Weiyan Yin, Dr. Haifeng He, Yani Zhang and Tong Long

      Article first published online: 6 JUN 2014 | DOI: 10.1002/asia.201402314

      Thumbnail image of graphical abstract

      O2 can do: A ligand-free, palladium-catalyzed aerobic oxidative coupling between carboxylic anhydrides and arylboronic acids has been developed to selectively prepare aryl benzoates. The reaction proceeds with a PdCl2 loading of 1 mol % under mild conditions.

  37. Full Papers

    1. Electrochemistry

      Mesoporous Spherical Li4Ti5O12 as High-Performance Anodes for Lithium-Ion Batteries

      Guojun Du, Dr. Zhaolin Liu, Dr. Siok Wei Tay, Prof. Xiaogang Liu and Prof. Aishui Yu

      Article first published online: 6 JUN 2014 | DOI: 10.1002/asia.201402224

      Thumbnail image of graphical abstract

      Clumped together: Porous microspherical Li4Ti5O12 aggregates (LTO-PSA) can be prepared from porous spherical TiO2 as a titanium source and lithium acetate as a lithium source. The synthesized LTO-PSA possess outstanding morphology (see picture), with nanosized, porous, and spherical distributions, and exhibit high reversible capacity, good cycling stability, and impressive rate performance.

  38. Communications

    1. Photocatalysis

      Direct Synthesis of Hexagonal NaGdF4 Nanocrystals from a Single-Source Precursor: Upconverting NaGdF4:Yb3+,Tm3+ and Its Composites with TiO2 for Near-IR-Driven Photocatalysis

      Ying Chen, Dr. Shashank Mishra, Dr. Gilles Ledoux, Dr. Erwann Jeanneau, Marlene Daniel, Prof. Jinlong Zhang and Prof. Stéphane Daniele

      Article first published online: 6 JUN 2014 | DOI: 10.1002/asia.201402347

      Thumbnail image of graphical abstract

      Up, up, and away! Using a novel single-source precursor, the most efficient hexagonal phase of the upconverting NaGdF4:Yb3+,Tm3+ nanocrystals was obtained under mild conditions. These nanocrystals were used to form a composite with TiO2 as a new photocatalyst, enabling titania to extend its absorption range from ultraviolet to the near-infrared region.

    2. DNA

      Label-Free Logic Modules and Two-Layer Cascade Based on Stem-Loop Probes Containing a G-Quadruplex Domain

      Yahui Guo, Junjie Cheng, Jine Wang, Xiaodong Zhou, Prof. Dr. Jiming Hu and Prof. Dr. Renjun Pei

      Article first published online: 6 JUN 2014 | DOI: 10.1002/asia.201402199

      Thumbnail image of graphical abstract

      Do you have any input? With three disease-specific sequences as inputs, a full set of logic gates (YES, NOT, OR, NAND, AND, INHIBIT, NOR, XOR, XNOR) and a logic cascade (an AND-AND two-layer circuit) were constructed by using stem-loop probes and toehold-mediated strand displacement. The probes contain a G-quadruplex domain, which was blocked or unfolded through inputs initiating strand displacement. The fluorescent signal of the G-quadruplex/NMM complex was used as the output readout.

  39. Focus Reviews

    1. Nanoporous Membranes

      Block Copolymer-Derived Monolithic Polymer Films and Membranes Comprising Self-Organized Cylindrical Nanopores for Chemical Sensing and Separations

      Takashi Ito

      Article first published online: 6 JUN 2014 | DOI: 10.1002/asia.201402136

      Thumbnail image of graphical abstract

      Alternative channels: Block copolymer-derived nanoporous monoliths have attracted considerable interest for various applications owing to their ordered, well-defined nanostructures of uniform and tunable dimensions. This focus review highlights recent efforts to apply such monolithic films/membranes comprising cylindrical nanopores for highly selective chemical sensing and separations.

    2. Click Chemistry

      Calixarene-Based Chemosensors by Means of Click Chemistry

      Miaomiao Song, Dr. Zhongyue Sun, Cuiping Han, Demei Tian, Prof. Haibing Li and Prof. Jong Seung Kim

      Article first published online: 4 JUN 2014 | DOI: 10.1002/asia.201400024

      Thumbnail image of graphical abstract

      I get a click out of you: Click chemistry has been widely used in the chemical modification of calixarenes because of its reliability, specificity, biocompatibility, and efficiency. This in-depth review provides an overview of calixarene-based chemosensors that incorporate click-derived triazoles, and their three characteristics (chromogenic, fluorescence, and wettability) are reviewed (see figure).

    3. Nanomaterials

      The Microwave-Assisted Ionic-Liquid Method: A Promising Methodology in Nanomaterials

      Prof. Ming-Guo Ma, Dr. Jie-Fang Zhu, Prof. Ying-Jie Zhu and Prof. Run-Cang Sun

      Article first published online: 4 JUN 2014 | DOI: 10.1002/asia.201402288

      Thumbnail image of graphical abstract

      Synthesis synopsis: This review focuses on the recent development of the synthesis of nanomaterials by means of the microwave-assisted ionic-liquid method (see figure), which is a promising synthetic route that complies with the principles of green chemistry.

  40. Full Papers

    1. Fluorescence

      Vertically π-Expanded Imidazo[1,2-a]pyridine: The Missing Link of the Puzzle

      Dikhi Firmansyah, Marzena Banasiewicz, Irena Deperasińska, Artur Makarewicz, Prof. Boleslaw Kozankiewicz and Prof. Daniel T. Gryko

      Article first published online: 27 MAY 2014 | DOI: 10.1002/asia.201402201

      Thumbnail image of graphical abstract

      Flat beat: The fusion of imidazo[1,2-a]pyridine with naphthalene can only be achieved under anion-radical coupling conditions. The resulting, flat imidazo[1,2-a]pyridine, which was fused with naphthalene at the 3,5 positions, was weakly fluorescent. Shpol′skii matrix and DFT calculations revealed that relaxation by intersystem crossing between the S1 state and a lower-lying triplet state was responsible for the low fluorescent quantum yield.

  41. Focus Reviews

    1. Metal–Organic Frameworks

      Stimulus-Responsive Metal–Organic Frameworks

      Sanjog S. Nagarkar, Aamod V. Desai and Dr. Sujit K. Ghosh

      Article first published online: 20 MAY 2014 | DOI: 10.1002/asia.201402004

      Thumbnail image of graphical abstract

      Get smart: Stimulus-responsive “smart” materials that respond to applied stimuli in a predictable and controlled manner are attractive for the development of intelligent technology. This Focus Review throws light on recent developments in the rapidly increasing field of stimulus-responsive metal–organic frameworks (MOFs), or smart MOFs, with representative examples.

    2. Organocatalysis

      Applications of Chiral Phosphine-Based Organocatalysts in Catalytic Asymmetric Reactions

      Dr. Yin Wei and Prof. Dr. Min Shi

      Article first published online: 12 MAY 2014 | DOI: 10.1002/asia.201402109

      Thumbnail image of graphical abstract

      Out with the old: The design and synthesis of new chiral phosphines, as well as their application in catalytic asymmetric reactions, have recently drawn a lot of attention. This review summarizes the advances in the field of enantioselective phosphine organocatalysis within the last couple of years.

  42. Full Papers

    1. Sensors

      Retracted: Nanoporous PdCu Near-Surface Alloy for Nonenzymatic Glucose Biosensing

      Qiaolin Lang, Liang Li, Aihua Liu and Huajun Qiu

      Article first published online: 16 APR 2012 | DOI: 10.1002/asia.201200016

      Thumbnail image of graphical abstract

      Sugar sugar: Nanoporous PdCu near-surface alloys that were prepared by two-step dealloying exhibited significantly enhanced electrocatalytic activity for glucose oxidation, which could be used for enhanced nonenzymatic glucose biosensing.

      Corrected by:

      Retraction: Retraction: Nanoporous PdCu Near-Surface Alloy for Nonenzymatic Glucose Biosensing

      Vol. 7, Issue 12, 2746, Article first published online: 26 NOV 2012

VIEW

  1. 1 - 91

SEARCH

SEARCH BY CITATION