Chemistry – An Asian Journal

Cover image for Vol. 8 Issue 6

June 2013

Volume 8, Issue 6

Pages 1045–1330

  1. Cover Pictures

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
    1. You have free access to this content
      Cover Picture: Facile Hydrogen-Bond-Assisted Polymerization and Immobilization Method to Synthesize Hierarchical Fe3O4@Poly(4-vinylpyridine-co-divinylbenzene)@Au Nanostructures and Their Catalytic Applications (Chem. Asian J. 6/2013) (page 1045)

      Wanchun Guo, Qian Wang, Prof. Ge Wang, Mu Yang, Prof. Wenjun Dong and Jie Yu

      Version of Record online: 23 MAY 2013 | DOI: 10.1002/asia.201390016

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      Well-defined core–shell Fe3O4@poly 4-vinylpyridine-co-divinyl benzene (Fe3O4@P(4VP-DVB)) magnetic polymer microspheres have been synthesized with the aid of strong hydrogen-bond interactions between magnetic cores and functional monomers, as reported by Ge Wang et al. in their Full Paper on page 1160 ff. Au nanoparticles were embedded into the outer shell of as-synthesized composite microspheres through reduction of HAuCl4 to finally form the Fe3O4@P(4VP-DVB)@Au nanostructure, which exhibited high catalytic activity, facile magnetic recoverability, and high stability for the reduction of 4-nitrophenol.

    2. You have free access to this content
      Inside Cover: Vibrational Circular Dichroism Spectroscopy of Three Multidentate Nitrogen Donor Ligands: Conformational Flexibility and Solvent Effects (Chem. Asian J. 6/2013) (page 1046)

      Zahra Dezhahang, Mohammad Reza Poopari and Prof. Dr. Yunjie Xu

      Version of Record online: 23 MAY 2013 | DOI: 10.1002/asia.201390017

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      Picolylamine-type ligands are multidentate nitrogen-donor ligands with a wide range of applications. In their Full Paper on page 1205 ff. (highlighted on the Inside Cover), Yunjie Xu et al. report the vibrational circular dichroism (VCD) spectra of three related chiral multidentate nitrogen-donor ligands. VCD spectroscopy measures the differential absorption of right versus left circularly polarized light that accompanies a vibrational transition and is highly sensitive to even minor structural changes. By comparing the experimental and the simulated VCD spectral features, the authors identified the dominant conformers of these ligands in solution and interpreted a VCD sign-reversed phenomenon observed in the amide I region using the explicit solvation model.

  2. Graphical Abstract

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
  3. News

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
  4. Focus Reviews

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
    1. Enzymes

      [Fe]-Hydrogenase and Models that Contain Iron[BOND]Acyl Ligation (pages 1068–1075)

      Dr. Katherine M. Schultz, Prof. Dr. Dafa Chen and Prof. Dr. Xile Hu

      Version of Record online: 17 APR 2013 | DOI: 10.1002/asia.201300232

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      Plenty of [Fe]s in the fire: Recent studies on the structure and properties of [Fe]-hydrogenase have revealed the presence of a mono-iron-containing active site with iron[BOND]acyl ligation. A number of synthetic complexes with this type of ligation have been prepared as models of this active site.

    2. Metal Aminoboranes

      Recent Process and Development of Metal Aminoborane (pages 1076–1089)

      Dr. Kun Wang, Prof. Jian-Guo Zhang, Tian-Tian Man, Man Wu and Chun-Chun Chen

      Version of Record online: 18 APR 2013 | DOI: 10.1002/asia.201201241

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      All to do with H2: This Focus Review discusses the development of metal aminoboranes including their synthesis, structure, chemical characterization, and applications. The lightweight nature of the molecules, the simplified procedures for the synthesis of the target compounds, the reversibility of hydrogen storage and dehydrogenation, and the mechanism of thermal decomposition are also discussed.

      Corrected by:

      Corrigendum: Corrigendum: Recent Process and Development of Metal Aminoborane

      Vol. 8, Issue 11, 2525, Version of Record online: 28 OCT 2013

  5. Communications

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
    1. Photochemistry

      Desulfonylation of Tosyl Amides through Catalytic Photoredox Cleavage of N[BOND]S Bond Under Visible-Light Irradiation (pages 1090–1094)

      Jun Xuan, Bin-Jie Li, Zhu-Jia Feng, Guo-Dong Sun, Huan-Huan Ma, Zhi-Wei Yuan, Dr. Jia-Rong Chen, Dr. Liang-Qiu Lu and Prof. Dr. Wen-Jing Xiao

      Version of Record online: 3 APR 2013 | DOI: 10.1002/asia.201300224

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      All lit up: A novel and efficient desulfonylation method of tosyl amides has been developed by means of visible-light-promoted reductive cleavage of N[BOND]S bonds. This method has a broad substrate scope, good functional group tolerance, and excellent yields.

    2. Polymers

      A Smart Cyclic Azobenzene as Pendant Groups on Polymer Chains: Topological Effect of the Cyclization on Thermal and Photoresponsive Properties of the Azobenzene and the Polymer (pages 1095–1100)

      Jiangyu Li, Prof. Nianchen Zhou, Prof. Zhengbiao Zhang, Ying Xu, Prof. Xinrong Chen, Prof. Yingfeng Tu, Prof. Zhijun Hu and Prof. Xiulin Zhu

      Version of Record online: 15 APR 2013 | DOI: 10.1002/asia.201300154

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      Put a ring on it: A cyclic azobenzene has a much higher melting point, stronger fluorescence, and better film-forming and SRG-formation ability than its linear precursor. Pcyclic-AzoMMA, with cyclic azobenzene pendant groups, has a much higher Tg value (100 °C) than Plinear-AzoMMA, with linear pendants groups (58 °C), and the modulation depth of the photoinduced SRG of Pcyclic-AzoMMA is thirty times larger than that of Plinear-AzoMMA.

    3. Hydrogenation

      Highly Enantioselective Hydrogenation of 2,4-Diaryl-1,5-Benzodiazepines Catalyzed by Dendritic Phosphinooxazoline Iridium Complexes (pages 1101–1104)

      Baode Ma, Ziyuan Ding, Ji Liu, Yanmei He and Prof. Dr. Qing-Hua Fan

      Version of Record online: 28 MAR 2013 | DOI: 10.1002/asia.201300150

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      A PHOX with arms: A series of dendrimers with Ir phosphinooxazoline (PHOX) cores were designed and synthesized and found to be highly effective and recoverable catalysts for asymmetric hydrogenation of 2,4-diaryl-1,5-benzodiazepines. An obvious positive dendritic effect on reactivity was observed, leading to chiral nitrogen-containing heterocycles with excellent enantioselectivities.

    4. Alkaloids

      Formal Synthesis of (±)-Morphine (pages 1105–1109)

      Jing Li, Guo-Liang Liu, Xian-He Zhao, Ji-Yuan Du, Hu Qu, Wen-Dao Chu, Ming Ding, Cong-Yang Jin, Meng-Xue Wei and Prof. Dr. Chun-An Fan

      Version of Record online: 18 MAR 2013 | DOI: 10.1002/asia.201300139

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      The pain ends here: A novel synthetic strategy for the construction of (±)-morphine rings B and E was developed, in which SmI2-promoted reductive coupling/desulfurization and tandem alcoholysis/oxa-Michael addition featured as the key steps for the assembly of the C9[BOND]C14 and C5[BOND]O bonds, respectively. Asymmetric tandem alcoholysis/oxa-Michael addition was also feasible for the enantiocontrolled synthesis of morphine.

    5. Supported Catalysts

      A Self-Supported Polymeric MacMillan Catalyst for Homogeneous Organocatalysis and Heterogeneous Recycling (pages 1110–1114)

      Chang An Wang, Dr. Yuan Zhang, Dr. Jiao Yi Shi and Prof. Dr. Wei Wang

      Version of Record online: 9 APR 2013 | DOI: 10.1002/asia.201300152

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      Lean on me: A soluble, “self-supported” chiral organosilica polymer (ChiOSP) with embedded imidazolidinone catalytic moieties was synthesized by a bottom-up strategy and applied as a highly efficient and recyclable organocatalyst for the asymmetric Diels–Alder reaction.

    6. Manganese Complexes

      Manganese(II) Semiquinonato and Manganese(III) Catecholato Complexes with Tridentate Ligand: Modeling the Substrate-Binding State of Manganese-Dependent Catechol Dioxygenase and Reactivity with Molecular Oxygen (pages 1115–1119)

      Prof. Dr. Hidehito Komatsuzaki, Akihiko Shiota, Shogo Hazawa, Muneaki Itoh, Noriko Miyamura, Nahomi Miki, Yoichi Takano, Dr. Jun Nakazawa, Dr. Akiko Inagaki, Prof. Dr. Munetaka Akita and Prof. Dr. Shiro Hikichi

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/asia.201300029

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      Catecholate catwalk: Monomeric manganese(III) catecholato and manganese(II) semiquinonato complexes as the substrate-binding model of catechol dioxygenase have been synthesized and structurally characterized. The semiquinonato complex reacted with molecular oxygen to give ring-cleaved products and benzoquinone in the catalytic condition.

  6. Full Papers

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Focus Reviews
    6. Communications
    7. Full Papers
    1. Nanostructures

      Conversion of CuO Nanoplates into Porous Hybrid Cu2O/Polypyrrole Nanoflakes through a Pyrrole-Induced Reductive Transformation Reaction (pages 1120–1127)

      You Xu, Huan Wang, Rongjiao Zhu, Cuibo Liu, Xuan Wu and Prof. Dr. Bin Zhang

      Version of Record online: 22 APR 2013 | DOI: 10.1002/asia.201300078

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      Flaking out: Porous hybrid Cu2O/polypyrrole nanoflakes were synthesized through reductive transformation of CuO nanoplates in the presence of pyrrole. The as-prepared porous hybrid nanostructures exhibited efficient catalytic activity and high stability towards an oxygen reduction reaction in alkaline solution.

    2. Heterometallic Complexes

      Electronic Structure of Monodithiolated Iron[BOND]Oxotungsten Heterometallic Complexes: Integer-Spin Fe[BOND]W Assembly (pages 1128–1138)

      Dr. Moumita Bose, Dr. Golam Moula and Prof. Dr. Sabyasachi Sarkar

      Version of Record online: 15 APR 2013 | DOI: 10.1002/asia.201300245

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      A Fe[BOND]W good men: Mössbauer and EPR spectroscopy, magnetism, electrochemistry, and electronic structural analysis based on DFT and TD-DFT calculations of a series of Fe[BOND]W bimetallic complexes show the presence of a ferromagnetically coupled FeIII[BOND]WV unit, along with antiferromagnetic intermolecular interactions, from the starting FeII and WVI compounds. A net spin of a S=3 ground state displays a rare X-band EPR in normal mode at g≈7.

    3. Solid-State Structures

      Structure, Optical, and Magnetic Properties of (PPN+)2(C702−)⋅2 C6H4Cl2, which Contains Dianionic Polymeric (C702−)n Chains (pages 1139–1143)

      Dr. Dmitri V. Konarev, Prof. Sergey I. Troyanov, Dr. Salavat S. Khasanov, Dr. Akihiro Otsuka, Prof. Hideki Yamochi, Prof. Gunzi Saito and Prof. Rimma N. Lyubovskaya

      Version of Record online: 11 MAR 2013 | DOI: 10.1002/asia.201300086

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      The cocoon chain: A new salt, (PPN+)2(C702−)2 C6H4Cl2 (1), which contains polymeric zigzag (C702−)n chains, was obtained; the fullerene C702− units are bonded in the polymer through single C[BOND]C bonds of length 1.581(5)–1.586(6) Å. Salt 1 shows broad absorption in the NIR region, with maxima at 890, 1200, and 1550 nm. The (C702−)n polymer is diamagnetic and EPR silent, with a negative molar magnetic susceptibility of −3.82×10−4 emu mol−1.

    4. Sensors

      Structure–Property Investigations of Substituted Triarylamines and Their Applications as Fluorescent pH Sensors (pages 1144–1151)

      Binbin Hu, Xiaopeng Chen, Yifei Wang, Prof. Dr. Ping Lu and Prof. Dr. Yanguang Wang

      Version of Record online: 5 APR 2013 | DOI: 10.1002/asia.201300028

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      A good sense o pH humor: Various triphenylamine derivatives functionalized with fluorophenyl, methoxyphenyl, and pyridinyl groups as respective donors and acceptors were synthesized and characterized. Their photophysical properties were systematically investigated in solvents of different polarities. Several synthesized compounds, especially tris(4-(pyridin-4-yl)phenyl) amine, exhibited significant pH-dependent absorptions and emissions, thus indicating that these compounds might be used as pH sensors.

    5. Single-Molecule Magnets

      Structural Tailoring Effects on the Magnetic Behavior of Symmetric and Asymmetric Cubane-Type Ni complexes (pages 1152–1159)

      Alexey N. Ponomaryov, Namseok Kim, Jaewon Hwang, Prof. Hiroyuki Nojiri, Dr. Johan van Tol, Dr. Andrew Ozarowski, Jena Park, Prof. Zeehoon Jang, Byoungjin Suh, Prof. Sungho Yoon and Prof. Kwang-Yong Choi

      Version of Record online: 18 MAR 2013 | DOI: 10.1002/asia.201300054

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      Cubane Libre: The structures of FeII and NiII cubanes were tuned by changing the steric size of peripheral ligands. The resulting asymmetric and symmetric metallocubanes possess different magnetic properties, as assessed by detailed electron paramagnetic resonance (EPR) measurements.

    6. Nanocatalysts

      Facile Hydrogen-Bond-Assisted Polymerization and Immobilization Method to Synthesize Hierarchical Fe3O4@Poly(4-vinylpyridine-co-divinylbenzene)@Au Nanostructures and Their Catalytic Applications (pages 1160–1167)

      Wanchun Guo, Qian Wang, Prof. Ge Wang, Mu Yang, Prof. Wenjun Dong and Jie Yu

      Version of Record online: 5 APR 2013 | DOI: 10.1002/asia.201201186

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      Stringing them along: Hierarchical Fe3O4@poly(4-vinylpyridine-co-divinylbenzene)@Au nanostructures were synthesized through a series of simple hydrogen-bond-assisted polymerization and immobilization processes (see scheme). The nanocatalysts exhibited outstanding activity, magnetic recoverability, and high stability for reduction of 4-nitrophenol.

    7. Diversity-Oriented Synthesis

      Synthesis of Privileged Scaffolds by Using Diversity-Oriented Synthesis (pages 1168–1176)

      Ramu Surakanti, Sumalatha Sanivarapu, Chiranjeevi Thulluri, Pravin S. Iyer, Raghuram S. Tangirala, Rambabu Gundla, Dr. Uma Addepally, Y. L. N. Murthy, Lakshmi Velide and Dr. Subhabrata Sen

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/asia.201201203

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      DOS and don′ts: A reagent-controlled strategy for the generation of biologically active scaffolds from a chiral lactam has been developed. In silico studies were used to estimate the drug-like properties of these compounds, such as spiroindoline.

      Corrected by:

      Corrigendum: Corrigendum: Synthesis of Privileged Scaffolds by Using Diversity-Oriented Synthesis

      Vol. 9, Issue 7, 1706, Version of Record online: 20 JUN 2014

    8. Cyclophanes

      Structural Fluctuation of Disilanyl Double-Pillared Bisheteroarenes (pages 1177–1181)

      Dr. Waka Nakanishi, Yusuke Shimada and Prof. Hiroyuki Isobe

      Version of Record online: 7 MAR 2013 | DOI: 10.1002/asia.201300098

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      One, two, three: Three congeners of disilanyl double-pillared bisheteroarenes have been synthesized by a concise one-pot synthetic procedure. The step-like structures of the silacyclophanes were revealed by X-ray crystallographic analysis. The step-like structures, however, fluctuated in a solution phase in the presence of steric congestions, and the dynamics were disclosed by NMR spectroscopy.

    9. Cooperative Catalysis

      Molecular Assembly of an Achiral Phosphine and a Chiral Primary Amine: A Highly Efficient Supramolecular Catalyst for the Enantioselective Michael Reaction of Aldehydes with Maleimides (pages 1182–1190)

      Wei Yang, Dr. Ke-Zhi Jiang, Xing Lu, Hua-Meng Yang, Dr. Li Li, Prof. Dr. Yixin Lu and Prof. Dr. Li-Wen Xu

      Version of Record online: 3 APR 2013 | DOI: 10.1002/asia.201300141

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      Good, phosphine! An achiral phosphine is an ideal partner in the chiral-primary-amine-catalyzed enantioselective Michael reaction of aliphatic aldehydes with maleimides, thus enabling enantioselective induction in a dual organocatalytic system.

    10. Heterogeneous Catalysis

      Alkane Oxidation by an Immobilized Nickel Complex Catalyst: Structural and Reactivity Differences Induced by Surface-Ligand Density on Mesoporous Silica (pages 1191–1199)

      Dr. Jun Nakazawa, Tomoaki Hori, Prof. Dr. T. Daniel P. Stack and Prof. Dr. Shiro Hikichi

      Version of Record online: 12 APR 2013 | DOI: 10.1002/asia.201300165

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      Going nowhere fast: An immobilized SBA*-L-x/Ni complex was prepared with various ligand loadings and used in the oxidation of cyclohexane. The importance of site-density control for the development of immobilized catalysts has been demonstrated.

    11. Graphene

      Could Carbonaceous Impurities in Reduced Graphenes be Responsible for Some of Their Extraordinary Electrocatalytic Activities? (pages 1200–1204)

      Lu Wang, Dr. Adriano Ambrosi and Prof. Martin Pumera

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/asia.201300122

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      Impure and simple: Thermally and chemically reduced graphene materials contain significant amounts of carbonaceous impurities that are similar in structure to amorphous carbon. Herein, the claimed electrocatalytic activities of these materials for the oxidation of NADH, acetaminophen, and hydroquinone are shown to mainly be due to the presence of carbonaceous impurities.

    12. Structure Determination

      Vibrational Circular Dichroism Spectroscopy of Three Multidentate Nitrogen Donor Ligands: Conformational Flexibility and Solvent Effects (pages 1205–1212)

      Zahra Dezhahang, Mohammad Reza Poopari and Prof. Dr. Yunjie Xu

      Version of Record online: 5 APR 2013 | DOI: 10.1002/asia.201300070

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      Good vibrations! Vibrational circular dichroism spectra of three related chiral multidentate nitrogen donor ligands allow the identification of the dominant conformers of these ligands in solution (see picture). Different degrees of conformational flexibility of these ligands are also investigated.

    13. Total Synthesis

      Total Synthesis of Tubulysin U and Its C-4 Epimer (pages 1213–1222)

      Xiu-dong Yang, Chang-ming Dong, Jian Chen, Ya-hui Ding, Qi Liu, Xiao-yan Ma, Dr. Quan Zhang and Prof. Yue Chen

      Version of Record online: 10 APR 2013 | DOI: 10.1002/asia.201300051

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      Talking Tuv: The Tup and Tuv fragments of tubulysins were obtained using chiral sulfinimines, and then tubulysin U and its C-4 epimer were synthesized in a highly selective and efficient manner. C-4 epi-tubulysin U maintained significant growth inhibition activities against cancer cell lines, as assessed by MTT assay.

    14. Amphiphiles

      Synthesis, Crystal Structures, and Optical/Electronic Properties of Sphere–Rod Shape Amphiphiles Based on a [60]Fullerene[BOND]Oligofluorene Conjugate (pages 1223–1231)

      Fu-Ai Teng, Dr. Yan Cao, Yuan-Jiang Qi, Mingjun Huang, Prof. Zhe-Wen Han, Prof. Stephen Z. D. Cheng, Dr. Wen-Bin Zhang and Prof. Hui Li

      Version of Record online: 11 MAR 2013 | DOI: 10.1002/asia.201300043

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      Shape matters: Sphere–rod shape amphiphiles, in which a [60]fullerene sphere was connected to an oligofluorene rod through a rigid linkage, were synthesized. The spheres and rods packed into an alternating layered structure in the crystals, resembling a “double-cable” structure

    15. Platinum Complexes

      Exploring Nitrogen Ligand Diversity in trans-N-Heterocyclic Carbene–Amine Platinum Complexes : Synthesis, Characterization, and Application to Fluorescence (pages 1232–1242)

      Dr.  Edith Chardon, Dr.  Georges Dahm, Dr.  Gilles Guichard and Dr.  Stéphane Bellemin-Laponnaz

      Version of Record online: 4 APR 2013 | DOI: 10.1002/asia.201201148

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      Expand and diversify your Ptfolio: N-Heterocyclic carbene-Pt-pyridine complexes have been used to generate an expanded and diversified set of trans NHC-Pt complexes with various amines, polyamines, hydroxylamines, or hydrazine as ligands. Attachment of a fluorophore moiety has also been successfully achieved.

    16. Total Synthesis

      Total Synthesis of Diaporthichalasin by Using the Intramolecular Diels–Alder Reaction of an α,β-Unsaturated γ-Hydroxylactam in Aqueous Media (pages 1243–1252)

      Nobuhiro Shionozaki, Naoki Iwamura, Ryo Tanaka, Prof. Kimiko Makino and Prof. Hiromi Uchiro

      Version of Record online: 28 MAR 2013 | DOI: 10.1002/asia.201201230

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      Livin′ the IMDA loca: The total synthesis of diaporthichalasin has been achieved for the first time. It features an intramolecular Diels–Alder (IMDA) reaction between the diene side chain on a decalin and an α,β-unsaturated lactam in aqueous media. Our findings suggest a novel biosynthetic pathway for diaporthichalasin.

    17. Organic Light-Emitting Diodes

      A Versatile Triphenylamine/Fluoranthene-Based Derivative as a Nondoped Green-Emitting, Hole-Transporting Interlayer for Electroluminescent Devices (pages 1253–1258)

      Yi Yuan, Guo-Qiang Zhang, Feng Lu, Prof.  Qing-Xiao Tong, Qing-Dan Yang, Hin-Wai Mo, Dr.  Tsz-Wai Ng, Dr.  Ming-Fai Lo, Dr.  Zheng-Qing Guo, Chuan Wu and Prof.  Chun-Sing Lee

      Version of Record online: 21 MAR 2013 | DOI: 10.1002/asia.201300002

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      Hidden depths: A new versatile material, 4-(7,10-diphenylfluoranthen-8-yl)-N-[4-(7,10-diphenylfluoranthen-8-yl)phenyl]-N-phenylaniline, with a high glass transition temperature of 220 °C has been synthesized and characterized. Its applications in organic light-emitting diodes have also been investigated (see picture).

    18. Surface Plasmon Resonance

      Observation of a Quadrupole Surface Plasmon Mode for Au Nanorods: Effects of Surface Roughness and Crystal Facets (pages 1259–1264)

      Soonchang Hong, Prof. Dr. Kevin L. Shuford and Prof. Dr. Sungho Park

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/asia.201300004

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      A la mode: Au nanorods (NRs) that were synthesized through two different synthetic methods displayed different surface crystallinity and smoothness. Au NRs that were synthesized by using a wet-chemical method showed a smoother surface, {111} single crystallinity, and a much stronger longitudinal surface plasmon (LSP) quadrupole mode than Au NRs that were prepared by using an anodized aluminum oxide (AAO)-template-assisted method.

    19. Heterogeneous Catalysis

      Cu[BOND]Cu2O[BOND]TiO2 Nanojunction Systems with an Unusual Electron–Hole Transportation Pathway and Enhanced Photocatalytic Properties (pages 1265–1270)

      Jun Xing, Zu Peng Chen, Fang Yuan Xiao, Xue Yan Ma, Ci Zhang Wen, Dr. Zhen Li and Prof. Hua Gui Yang

      Version of Record online: 12 MAR 2013 | DOI: 10.1002/asia.201300019

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      Powerful separation: Multicomponent Cu[BOND]Cu2O[BOND]TiO2 nanojunction systems were successfully synthesized by a mild chemical process (see picture) and exhibited prolonged lifetimes of photogenerated carriers and enhanced photocatalytic properties. An unusual electron–hole transmission pathway for the photocatalytic reaction over Cu[BOND]Cu2O[BOND]TiO2 was also identified.

    20. Chromogenic Probes

      Turn-On Fluorogenic Probes for the Selective and Quantitative Detection of the Cyanide Anion from Natural Sources (pages 1271–1278)

      Dr. Teresa Gómez, Dr. Daniel Moreno, Borja Díaz de Greñu, A. Cristina Fernández, Dr. Teresa Rodríguez, Dr. Josefa Rojo, Dr. José V. Cuevas and Prof. Dr. Tomás Torroba

      Version of Record online: 11 MAR 2013 | DOI: 10.1002/asia.201300049

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      Shining almonds! A new indene derivative is a highly selective and sensitive fluorogenic probe for the fluorescent detection and quantification of cyanide anions from aqueous extracts of green almond seeds, with a 103-fold increase of fluorescence and low detection limit (see figure), thus proving that the system is suitable for fast detection and quantification of cyanide from natural sources.

    21. Two-Photon Absorption

      Bright, Fluorescent Dyes Based on Imidazo[1,2-a]pyridines that are Capable of Two-Photon Absorption (pages 1279–1294)

      Dikhi Firmansyah, Adina I. Ciuciu, Vincent Hugues, Dr. Mireille Blanchard-Desce, Dr. Lucia Flamigni and Prof. Daniel T. Gryko

      Version of Record online: 5 APR 2013 | DOI: 10.1002/asia.201300058

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      Mr. Brightside: Imidazo[1,2-a]pyridine derivatives show blue, green, or yellow fluorescence depending on the nature of the substituents. Quadrupolar dyes that feature this scaffold as an electron donor display an advantageous combination of optical properties, including two-photon brightness (40 GM).

    22. Electrochemistry

      Transition Metal (Mn, Fe, Co, Ni)-Doped Graphene Hybrids for Electrocatalysis (pages 1295–1300)

      Rou Jun Toh, Hwee Ling Poh, Prof. Zdeněk Sofer and Prof. Martin Pumera

      Version of Record online: 11 MAR 2013 | DOI: 10.1002/asia.201300068

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      Performance-enhancing doping: Transition metal-doped graphene hybrids were prepared by exfoliation of metal-doped graphite oxide precursors in either H2 or N2 atmosphere. The electrocatalytic activities of the transition metal-doped graphene hybrids were reflected in an enhancement of the kinetics of oxygen reduction under alkaline conditions, which is important for renewable energy applications such as fuel cells. It was found that hybrid materials exfoliated in N2 atmosphere exhibited greater electrocatalytic activities than those exfoliated in H2 atmosphere.

    23. Drug Delivery

      Inorganic–Organic Hybrid Nanoparticles with Biocompatible Calcium Phosphate Thin Shells for Fluorescence Enhancement (pages 1301–1305)

      Dr. Bishnu Prasad Bastakoti, Yin-Chu Hsu, Shih-Hsiang Liao, Prof. Kevin C.-W. Wu, Dr. Masamichi Inoue, Prof. Shin-ichi Yusa, Kenichi Nakashima and Prof. Yusuke Yamauchi

      Version of Record online: 25 MAR 2013 | DOI: 10.1002/asia.201300072

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      Facile strategy delivers: Polymeric micelles consisting of asymmetric triblock copolymers were successfully used for fabrication of robust hybrid nanoparticles with highly biocompatible calcium phosphate shells. Fluorescent dyes can be used as imaging agents for determining the location of the nanoparticles and to give an observable indication of drug delivery, while the calcium phosphate shell can enhance the fluorescence of the encapsulated dye.

    24. Calcium Phosphate Hybrid Nanoparticles: Self-Assembly Formation, Characterization, and Application as an Anticancer Drug Nanocarrier (pages 1306–1312)

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

      Version of Record online: 15 APR 2013 | DOI: 10.1002/asia.201300083

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      Exerting control: A simple, room-temperature synthesis of calcium phosphate hybrid nanoparticles (CaP-HNPs) by using poly(diallyldimethylammonium chloride) (PDADMAC) and poly(acrylate sodium) (PAS) as dual templates is described (see picture). The as-prepared CaP-HNPs are promising anticancer drug (docetaxel; Dtxl) nanocarriers for cancer therapy.

    25. Hierarchical Hollow Hydroxyapatite Microspheres: Microwave-Assisted Rapid Synthesis by Using Pyridoxal-5′-Phosphate as a Phosphorus Source and Application in Drug Delivery (pages 1313–1320)

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

      Version of Record online: 3 APR 2013 | DOI: 10.1002/asia.201300142

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      Bon apatite: Hierarchical hydroxyapatite nanostructures that were constructed by the self-assembly of nanorods or nanosheets, including nanorod-assembled hierarchical hollow microspheres, nanorod-assembled hierarchical microspheres, and nanosheet-assembled hierarchical microspheres, have been prepared by using biocompatible biomolecule pyridoxal-5′-phosphate (PLP) as an organic phosphorus source in a rapid microwave-assisted hydrothermal method.

    26. Chemosensors

      Colorimetric and Fluorescent Chemosensors for the Detection of 2,4,6-Trinitrophenol and Investigation of their Co-Crystal Structures (pages 1321–1330)

      Ming Dong, Prof. Dr. Ya-Wen Wang, Dr. Ai-Jiang Zhang and Prof. Dr. Yu Peng

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/asia.201300159

      Thumbnail image of graphical abstract

      Glowing recommendation: We have demonstrated the selective, sensitive recognition of 2,4,6-trinitrophenol (TNP) with remarkable visual changes in a series of N-acylhydrazone fluorescent chemosensors (see figure). Their host–guest interactions were established from 1H NMR spectroscopic titrations and the corresponding co-crystal structures. An intramolecular charge-transfer process during fluorescence quenching was further disclosed through DFT calculations.

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