Chemistry – An Asian Journal

Cover image for Vol. 6 Issue 9

September 5, 2011

Volume 6, Issue 9

Pages 2181–2563

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
    1. Cover Picture: Solution-Processable n-Type Organic Field-Effect Transistor (OFET) Materials Based on Carbonyl-Bridged Bithiazole and Dioxocyclopentene-Annelated Thiophenes (Chem. Asian J. 9/2011) (page 2181)

      Masashi Nitani, Prof. Yutaka Ie, Prof. Hirokazu Tada and Prof. Yoshio Aso

      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201190035

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      Organic semiconducting materials are an essential component of organic electronic devices. In their Full Paper on page 2352 ff., Y. Ie, Y. Aso et al. report a series of electronegative π-conjugated compounds, composed of carbonyl-bridged bithiazole and alkyl-substituted dioxocyclopenta[b]thiophene, which function as solution-processable n-type organic field-effect transistor (OFET) materials with a high electron mobility of 0.011 cm2 V−1 s−1. Furthermore, OFETs based on these compounds can operate under air-exposed conditions, owing to both the low-lying lowest unoccupied molecular orbital energy level and the formation of well-ordered crystalline films in the solid state.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
    1. Inside Cover: Precise Design of Artificial Cofactors for Enhancing Peroxidase Activity of Myoglobin: Myoglobin Mutant H64D Reconstituted with a “Single-Winged Cofactor” Is Equivalent to Native Horseradish Peroxidase in Oxidation Activity (Chem. Asian J. 9/2011) (page 2182)

      Dr. Takashi Matsuo, Kazuki Fukumoto, Takuro Watanabe and Prof. Dr. Takashi Hayashi

      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201190036

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      Single-winged heme co-factor brings about the drastic enhancement of the catalytic oxidation activity in myoglobin, an oxygen-storage protein. In their Full Paper on page 2491 ff, Matsuo, Hayashi et al. propose a versatile strategy to alter or enhance the functions of naturally occurring hemoproteins using a combination of “genetic mutation” and the “introduction of a synthetic co-factor”. This synergistic strategy develops unique proteins with ultra-native functions.

  3. Society Spotlight

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
    1. You have free access to this content
      The Chemical Society of Thailand (pages 2184–2186)

      Supawan Tantayanon and Supavadee Kiatisevi

      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201100575

    2. You have free access to this content
      Institut Kimia Malaysia (pages 2187–2190)

      Dr. Soon Ting-Kueh

      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201100576

    3. You have free access to this content
      The New Zealand Institute of Chemistry (pages 2191–2192)

      Gordon Rewcastle

      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201100594

  4. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
  5. News

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
  6. Focus Reviews

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
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    1. Crystal Forms

      Dealing with Crystal Forms (The Kingdom of Serendip?) (pages 2214–2223)

      Prof. Dario Braga, Simone d'Agostino, Elena Dichiarante, Dr. Lucia Maini and Prof. Fabrizia Grepioni

      Version of Record online: 27 MAY 2011 | DOI: 10.1002/asia.201100084

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      Crystal buds: This review provides examples of how a bottom-up approach (see picture) to crystalline materials, even when it fails to take on a straight road from design to target, and even when it leads to an undesired target, will still provide new inputs and afford unexpected results. The first set of examples refers to hydrates and polymorph interconversion, whereas the second section deals with co-crystal properties and the formation of co-crystals with ionic solids.

    2. Cycloadditions

      Revisiting Keteniminium Salts: More than the Nitrogen Analogs of Ketenes (pages 2224–2239)

      Dr. Claire Madelaine, Viviana Valerio and Dr. Nuno Maulide

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/asia.201100108

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      More than meets the eye: In this Focus Review, we take a look at recent developments on the chemistry of keteniminium salts, highlighting their versatility as powerful electrophilic heterocumulene reagents. Applications ranging from cycloaddition chemistry to cascade rearrangements and even depolymerization of biomass are presented.

  7. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
    1. Reductive Amination

      An Easy and General Iron-catalyzed Reductive Amination of Aldehydes and Ketones with Anilines (pages 2240–2245)

      Steffen Fleischer, Shaolin Zhou, Dr. Kathrin Junge and Prof. Dr. Matthias Beller

      Version of Record online: 26 JUL 2011 | DOI: 10.1002/asia.201100462

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      A will of iron: An iron-catalyzed reductive amination of aldehydes and ketones with anilines using molecular hydrogen is presented. Under mild conditions, high yields for a broad range of aryl, alkyl, and heterocyclic ketones as well as aldehydes are achieved.

    2. Fluorescence

      Two-Photon-Absorption Technique for Selective Detection of Copper(II) Ions in Aqueous Solution Using a Dansyl–Pyrene Conjugate (pages 2246–2250)

      Prof. Dr. Vadapalli Chandrasekhar, Dr. Mrituanjay D. Pandey, Sandeep Kumar Maurya, Dr. Pratik Sen and Prof. Dr. Debabrata Goswami

      Version of Record online: 1 JUL 2011 | DOI: 10.1002/asia.201100032

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      Rhythm is a dansyl: A novel dansyl–pyrene conjugate functions as a fluorescence signaling unit showing strong fluorescence quenching upon interaction with copper(II) metal ions. On the other hand, the two-photon absorption (TPA) cross-section increased from 374 to 3022 GM (at 770 nm) upon interaction with copper(II) ions, thus allowing their selective detection in aqueous solutions.

    3. Aldol Reactions

      Tandem One-Pot Wittig/Reductive Aldol Reactions in which the Waste from One Process Catalyzes a Subsequent Reaction (pages 2251–2254)

      Jinni Lu and Prof. Dr. Patrick H. Toy

      Version of Record online: 6 JUL 2011 | DOI: 10.1002/asia.201100296

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      Putting waste to work: Tandem one-pot Wittig/reductive aldol reactions have been performed in which the byproduct of the Wittig reaction, Ph3PO, catalyzes the reductive aldol reaction. This methodology is versatile and allows for three different building blocks to be combined in a simple, one-pot procedure.

    4. Asymmetric Synthesis

      Dienamine Activation in the Organocatalytic Asymmetric Synthesis of cis-3,4-Difunctionalized Chromans and Dihydrocoumarins (pages 2255–2259)

      Prof. Dr. Dieter Enders, Xuena Yang, Dr. Chuan Wang, Prof. Dr. Gerhard Raabe and Jan Runsik

      Version of Record online: 6 JUL 2011 | DOI: 10.1002/asia.201100320

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      Dienamine activation wins against oxa-1,4/1,4: By using nitrovinyl phenols and enals, aminocatalysis allows the asymmetric synthesis of chromans and dihydrocoumarins bearing a C[BOND]C double bond at the 3-position (see scheme; TMS=trimethylsilyl). The new protocol takes advantage of the dienamine reactivity of the enal and avoids the known oxa-Michael/Michael sequence.

    5. Total Synthesis

      Efficient Total Synthesis of Dysidenin, Dysidin, and Barbamide (pages 2260–2263)

      Elizabeth A. Ilardi and Prof. Dr. Armen Zakarian

      Version of Record online: 22 JUN 2011 | DOI: 10.1002/asia.201100338

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      The total syntheses of three trichloroleucine-derived marine natural products—dysidenin, dysidin, and barbamide—capitalized on a practical and highly diastereoselective ruthenium catalyzed radical chloroalkylation of N-acyloxazolidinones as the key step.

    6. Fenton Reactions

      An Efficient Anthraquinone–Resin Hybrid Co-Catalyst for Fenton-Like Reactions: Acceleration of the Iron Cycle Using a Quinone Cycle under Visible-Light Irradiation (pages 2264–2268)

      Dr. Jiahai Ma, Dr. Wanhong Ma, Dr. Chuncheng Chen, Dr. Hongwei Ji and Prof. Dr. Jincai Zhao

      Version of Record online: 8 JUL 2011 | DOI: 10.1002/asia.201100347

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      Fenton goes solid: A simple, efficient, and recyclable solid co-catalyst promotes the Fenton-like destruction of organic pollutants by integrating multiple chemical functions (including visible-light harvest, acceleration of the iron cycle, and avoidance of ROS attack) into a stable chemical architecture.

    7. Asymmetric Synthesis

      One-Pot Construction of Multi-Substituted Spiro-Cycloalkanediones by an Organocatalytic Asymmetric Epoxidation/Semipinacol Rearrangement (pages 2269–2272)

      Bao-Sheng Li, Dr. En Zhang, Qing-Wei Zhang, Prof. Dr. Fu-Min Zhang, Prof. Dr. Yong-Qiang Tu and Prof. Dr. Xiao-Ping Cao

      Version of Record online: 15 JUN 2011 | DOI: 10.1002/asia.201100383

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      A one-pot preparation of chiral tri-oxygenated spirocycloalkanediones with up to 99 % ee features high stereoselectivity, the introduction of tri-oxygenated functional groups, and the efficient construction of at least two chiral centers.

    8. Platinum Catalysis

      Efficient Control for the Cationic Platinum(II)-Catalyzed Concise Synthesis of Two Types of Fused Carbocycles with Angular Oxygen Functionality (pages 2273–2277)

      Dr. Hiroyuki Kusama, Eiichi Watanabe, Dr. Kento Ishida and Prof. Dr. Nobuharu Iwasawa

      Version of Record online: 22 JUL 2011 | DOI: 10.1002/asia.201100460

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      Double trouble: An efficient method for the preparation of two types of synthetically useful bicyclo[5.4.0]undecanes with an angular oxygen functionality was realized starting from easily available substrates; this method was based on the [3+2] cycloaddition reaction of the platinum-containing carbonyl ylide (see scheme; R1=alkyl or alkoxy, R2=alkyl, R3=alkyl or vinyl).

    9. Carbon Nanotubes

      CNTs@SnO2@Carbon Coaxial Nanocables with High Mass Fraction of SnO2 for Improved Lithium Storage (pages 2278–2281)

      Shujiang Ding, Jun Song Chen and Xiong Wen (David) Lou

      Version of Record online: 21 JUN 2011 | DOI: 10.1002/asia.201100057

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      The nanoCable Guy: Carbon nanotubes (CNTs)@SnO2@carbon have been fabricated using a simple procedure. The material exhibits greatly enhanced lithium-storage capacities and excellent cycling performance over extended cycles owing to their unique structural configuration and chemical composition.

    10. Nanoporous Materials

      Synthesis of a Titanium-Containing Prussian-Blue Analogue with a Well-Defined Cube Structure and Its Thermal Conversion into a Nanoporous Titanium–Iron-Based Oxide (pages 2282–2286)

      Dr. Ming Hu and Prof. Dr. Yusuke Yamauchi

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/asia.201100075

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      Out of the blue: Ti-containing Prussian blue analogues with well-defined cube structures were synthesized using a commercially available block copolymer (F127). The successful conversion of Ti-containing PB analogues into nanoporous Ti–Fe-based oxide cubes was also demonstrated.

    11. Nucleophilic Additions

      “On Water” Nucleophilic Addition of Formaldehyde N,N-Dialkylhydrazones to α-Keto Esters (pages 2287–2290)

      Ana Crespo-Peña, Prof. Eloísa Martín-Zamora, Prof. Rosario Fernández and Dr. José M. Lassaletta

      Version of Record online: 26 JUL 2011 | DOI: 10.1002/asia.201100174

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      Water solves the problem: The use of pure water as the reaction mixture is key for the nucleophilic addition of formaldehyde hydrazones to α-keto esters, leading to highly functionalized carbinols in high yields and short reaction times. The need for heterogeneous conditions and the observed solvent kinetic isotope effect are in agreement with the proposed “on water” activation.

    12. Cross-Coupling Reactions

      Base-Free Palladium-Catalyzed Sonogashira Coupling Using Organogold Complexes (pages 2291–2295)

      Dr. Sreekumar Pankajakshan and Prof. Dr. Teck-Peng Loh

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/asia.201100263

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      Turn to gold: An effective protocol for base-free Sonogashira coupling reactions using organogold complexes as nucleophilic partners has been developed. The palladium-catalyzed methodology offers a general synthesis of aryl–alkynes under operationally simple conditions in good to excellent yields.

    13. OLEDs

      Bis(carbazolyl)benzodifuran has a High Triplet Energy Level for Application in Blue Phosphorescent OLED (pages 2296–2300)

      Dr. Chikahiko Mitsui, Dr. Hideyuki Tanaka, Dr. Hayato Tsuji and Prof. Dr. Eiichi Nakamura

      Version of Record online: 11 JUL 2011 | DOI: 10.1002/asia.201100326

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      Ambipolar semiconducting material o-MeCZBDF, which has a high excited triplet energy level (ET), has been synthesized. This compound has high carrier mobilities for both holes and electrons in the amorphous state. Such characteristics are attributed to the electronegative character of the oxygen atom incorporated in the π-electron system.

    14. Mixed-Valent Compounds

      Fluorination Reaction of a Ditelluride Bearing Bulky Aryl Substituents: Formation of Mixed-Valent TeIV[BOND]TeII Ditelluride Difluoride (pages 2301–2303)

      Koh Sugamata, Dr. Takahiro Sasamori and Prof. Dr. Norihiro Tokitoh

      Version of Record online: 29 JUN 2011 | DOI: 10.1002/asia.201100368

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      Te for two: Fluorination reaction of a ditelluride bearing bulky substituents resulted in the formation of a mixed-valent TeIV-TeII ditelluride difluoride derivative.

    15. Nanostructures

      Metallic Impurities are Responsible for Electrocatalytic Behavior of Carbon Nanotubes Towards Sulfides (pages 2304–2307)

      Elaine Lay Khim Chng and Prof. Martin Pumera

      Version of Record online: 10 JUN 2011 | DOI: 10.1002/asia.201100318

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      The observed “electrocatalytic” effect for the electrochemical oxidation of the sulfide group in sodium hydrogen sulfide on the SWCNTs-modified electrodes can be attributed to the presence of nickel-based metallic impurities present within the CNTs.

    16. Hydroxymethylation

      Kinetics Studies of the Enantioselective Hydroxymethylation of Silicon Enolates Using Aqueous Formaldehyde in the Presence of Sc(OTf)3 and a Chiral 2,2′-Bipyridine Ligand (pages 2308–2311)

      Dr. Chandan Mukherjee, Taku Kitanosono and Prof. Dr. Shū Kobayashi

      Version of Record online: 14 JUL 2011 | DOI: 10.1002/asia.201100353

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      The kinetics of chiral scandium(III)-catalyzed hydroxymethylation of silicon enolates using aqueous formaldehyde have been investigated, and a reaction mechanism of this process in organic/aqueous medium is proposed.

    17. Fullerenes

      Inhibition of Amyloid β Aggregation and Cytotoxicity by Photodegradation Using a Designed Fullerene Derivative (pages 2312–2315)

      Yasunori Ishida, Tomohiko Fujii, Prof. Dr. Kotaro Oka, Dr. Daisuke Takahashi and Prof. Dr. Kazunobu Toshima

      Version of Record online: 20 JUL 2011 | DOI: 10.1002/asia.201100421

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      Photos allowed: Upon photoirradiation, a purpose-designed fullerene derivative effectively inhibited the cytotoxicity of Aβ42 peptide in neuron-like PC12 cells by degrading the Aβ42 monomer and oligomers, which are key compounds in Alzheimer's disease.

    18. Donor–Acceptor Systems

      Anion[BOND]π Interactions in Flavoproteins (pages 2316–2318)

      Carolina Estarellas, Dr. Antonio Frontera, Dr. David Quiñonero and Prof. Dr. Pere M. Deyà

      Version of Record online: 29 JUN 2011 | DOI: 10.1002/asia.201100285

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      Flavo of the week: Anion[BOND]π interactions play a fundamental role either in inhibiting enzymatic activity or in the binding of the substrate to some flavin-dependent enzymes, prior to the enzymatic reaction. The interaction has been studied using high-level ab initio calculations.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Society Spotlight
    5. Graphical Abstract
    6. News
    7. Focus Reviews
    8. Communications
    9. Full Papers
    10. Preview
    1. Nanostructures

      Hydrothermal Synthesis and Properties of Controlled α-Fe2O3 Nanostructures in HEPES Solution (pages 2320–2331)

      Hui Li, Dr. Zhong Lu, Qin Li, Dr. Man-Ho So, Prof. Chi-Ming Che and Prof. Rong Chen

      Version of Record online: 9 JUN 2011 | DOI: 10.1002/asia.201100204

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      HEPES helps or hinders: Different α-Fe2O3 nanostructures have been successfully synthesized by means of a facile hydrothermal method in the HEPES solution (see picture). HEPES/FeCl3 molar ratio and pH value of HEPES solution influenced the morphologies and sizes remarkably. The α-Fe2O3 nanostructures possess different optical, magnetic properties, and photocatalytic activities.

    2. Nanoparticles

      Small Mesoporous Silica Nanoparticles as Carriers for Enhanced Photodynamic Therapy (pages 2332–2338)

      Jie Zhu, Huixiang Wang, Lei Liao, Lingzhi Zhao, Liang Zhou, Meihua Yu, Prof. Yunhua Wang, Prof. Baohong Liu and Prof. Chengzhong Yu

      Version of Record online: 8 JUL 2011 | DOI: 10.1002/asia.201100064

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      Small mesoporous silica nanoparticles (diameters ca. 37 nm) have a high loading capacity for a hydrophobic photosensitizer, SiPcCl2, and excellent endocytosis property. Thus, the amount of SiPcCl2 delivered to cancer cells increased by approximately two orders of magnitude compared to pure SiPcCl2, and the photodynamic therapy (PDT) efficiency was enhanced by over fourfold.

    3. Self-Assembly

      Tuning the Excited State of Photoactive Building Blocks for Metal-Templated Self-Assembly (pages 2339–2351)

      Dr. Haslina Ahmad, Dr. Anthony J. H. M. Meijer and Dr. Jim A. Thomas

      Version of Record online: 6 JUL 2011 | DOI: 10.1002/asia.201100091

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      From little things, big things grow! The nature of co-ligands in a series of Ru(qtpy)-based complexes affects the electrochemical and photophysical properties of the resultant systems and also affects the solvent sensitivity of the excited states. Therefore, electrochemical and photophysical properties of self-assembled metallomacrocycles constructed from the mononuclear complexes can be tuned through judicious selection of building blocks.

    4. Semiconductors

      Solution-Processable n-Type Organic Field-Effect Transistor (OFET) Materials Based on Carbonyl-Bridged Bithiazole and Dioxocyclopentene-Annelated Thiophenes (pages 2352–2361)

      Masashi Nitani, Prof. Yutaka Ie, Prof. Hirokazu Tada and Prof. Yoshio Aso

      Version of Record online: 28 JUN 2011 | DOI: 10.1002/asia.201100098

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      Field work: A series of electronegative π-conjugated compounds (see scheme) were synthesized as a candidate for solution-processable n-type organic semiconductor materials and characterized on the basis of photophysical and electrochemical properties. Organic field-effect transistor devices based on these compounds showed good electron mobility even in air.

    5. Adsorption Configurations

      Coverage-Dependent Variation of Adsorption Configurations of Methionine on Ge(100) (pages 2362–2367)

      Sena Yang, Yaewon Kim, Sunmin Park, Dr. Ki-jeong Kim and Prof. Dr. Hangil Lee

      Version of Record online: 17 MAY 2011 | DOI: 10.1002/asia.201100004

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      Variations in the adsorption structure of methionine on the Ge(100) surface were investigated by using DFT calculations and core-level photoelectron spectroscopy (see figure). At low coverage, the N 1s core-level spectra showed a charged amine feature that indicated the dative bonging feature (marked as N1). At higher coverage, the N 1s core-level spectra displayed two distinct peaks (marked as N1 and N2; neutralized amine feature).

    6. Supramolecular Chemistry

      Stiff, Multistimuli-Responsive Supramolecular Hydrogels as Unique Molds for 2D/3D Microarchitectures of Live Cells (pages 2368–2375)

      Harunobu Komatsu, Dr. Shinya Tsukiji, Dr. Masato Ikeda and Prof. Itaru Hamachi

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/asia.201100134

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      Zwitterionic supramolecular hydrogels exhibiting multistimuli-responsive properties, dual-pH and light response, with sufficient stiffness were developed. This stiff and multistimuli-responsive hydrogel is very useful as a unique molding template to fabricate various substrates including a collagen gel into 2D/3D microarchitectures for spatially patterning, culturing, and differentiation of live cells (see scheme).

    7. Sensors

      Tetraphenylethylene-based Glycoconjugate as a Fluorescence “Turn-On” Sensor for Cholera Toxin (pages 2376–2381)

      Xin-Ming Hu, Dr. Qi Chen, Jin-Xiang Wang, Qian-Yi Cheng, Prof. Chao-Guo Yan, Prof. Jie Cao, Prof. Yu-Jian He and Prof. Bao-Hang Han

      Version of Record online: 11 JUL 2011 | DOI: 10.1002/asia.201100141

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      Tale of the TPE: Tetraphenylethylene-based glycoconjugates bearing lactosyl moieties can serve as a fluorescence “turn-on” sensor for cholera toxin by virtue of aggregation-induced emission characteristics of TPE motif.

    8. Oxidation

      Oxyfold: A Simple and Efficient Solid-Supported Reagent for Disulfide Bond Formation (pages 2382–2389)

      Dr. Pascal Verdié, Dr. Luisa Ronga, Dr. Michèle Cristau, Dr. Muriel Amblard, Dr. Sonia Cantel, Prof. Christine Enjalbal, Dr. Karine Puget, Prof. Jean Martinez and Dr. Gilles Subra

      Version of Record online: 7 JUN 2011 | DOI: 10.1002/asia.201100202

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      Polymer-supported reagents: The synthesis and use of novel polymer-supported reagents for disulfide bond formation has been described (see scheme). This family of supported reagents consists of a series of oxidized methionines grafted onto a solid support.

    9. Cyclodextrins

      Solubilization of Polycyclic Aromatics in Water by γ-Cyclodextrin Derivatives (pages 2390–2399)

      Hai Ming Wang and Prof. Dr. Gerhard Wenz

      Version of Record online: 7 JUL 2011 | DOI: 10.1002/asia.201100217

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      Solving the solubility: A high solubilization of polycyclic aromatic molecules in aqueous solution was achieved by utilizing hydrophilic γ-cyclodextrin (CD) thioethers. The formation of water-soluble 1:2 inclusion compounds between γ-CD derivatives and aromatic guests (see graphic) was confirmed by solubility studies, excimer fluorescence, and quantum mechanical calculations.

    10. Photochromism

      Photoinduced Reversible Topographical Changes on Diarylethene Microcrystalline Surfaces with Biomimetic Wetting Properties (pages 2400–2406)

      Naoki Nishikawa, Ayaka Uyama, Dr. Takashi Kamitanaka, Dr. Hiroyuki Mayama, Dr. Yuko Kojima, Dr. Satoshi Yokojima, Prof. Dr. Shinichiro Nakamura, Prof. Dr. Kaoru Tsujii and Prof. Dr. Kingo Uchida

      Version of Record online: 29 JUN 2011 | DOI: 10.1002/asia.201100218

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      Flower power: Lotus leaf and rose petal wetting surfaces were designed and repeatedly realized on a microcrystalline photochromic diarylethene film by a sequence of photo-control. The difference between the surfaces was characterized by the size-distribution of the microcrystals.

    11. DNA Cleavage

      Manipulation of Single-Stranded DNA by Using an Artificial Site-Selective DNA Cutter Composed of Cerium(IV)/EDTA and Phosphonate–Oligonucleotide Conjugates (pages 2407–2411)

      Dr. Yuichiro Aiba, Dr. Tuomas Lönnberg and Prof. Dr. Makoto Komiyama

      Version of Record online: 13 JUL 2011 | DOI: 10.1002/asia.201100238

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      Breaking point: By using an artificial site-selective DNA cutter that can manipulate long, single-stranded DNA, the BFP gene is selectively cut at its chromophore-coding site and converted into the closely related GFP. The desired protein is successfully expressed from the recombinant construct in E. coli, emitting green fluorescence as planned (see picture).

    12. Fullerenes

      Capturing the Most-Stable C56 Fullerene Cage by In Situ Chlorination (pages 2412–2418)

      Karolin Ziegler, Andreas Mueller, Dr. Konstantin Yu. Amsharov and Prof. Dr. Martin Jansen

      Version of Record online: 14 JUL 2011 | DOI: 10.1002/asia.201100293

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      The most-stable #916C56 carbon cage was captured by in situ chlorination during the radio frequency furnace process. This discovery provides evidence for a thermodynamically controlled mechanism for fullerene formation, and shows that the in situ chlorination does not significantly influence the fullerene formation itself.

    13. Diels–Alder Reactions

      Dynamic Covalent Chemistry: A Facile Room-Temperature, Reversible, Diels–Alder Reaction between Anthracene Derivatives and N-Phenyltriazolinedione (pages 2419–2425)

      Dr. Nabarun Roy and Prof. Jean-Marie Lehn

      Version of Record online: 8 JUL 2011 | DOI: 10.1002/asia.201100244

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      In reverse: By employing the concept of a reversible Diels–Alder (DA) reaction between anthracene and phenyltriazolinedione, a series of DA cycloadducts were synthesized. These adducts can be reversibly switched, by temperature control, from nonfluorescent to fluorescent materials, thus paving the way towards the optodynamer synthesis.

    14. Self-Assembly

      Shape-Persistent Two-Component 2 D Networks with Atomic-Size Tunability (pages 2426–2430)

      Jia Liu, Xu Zhang, Prof. Dr. Dong Wang, Dr. Jie-Yu Wang, Prof. Dr. Jian Pei, Prof. Peter J. Stang and Prof. Dr. Li-Jun Wan

      Version of Record online: 13 JUL 2011 | DOI: 10.1002/asia.201100431

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      A series of two-component nanoporous networks with a 3-fold symmetry were constructed on graphite. The hydrogen-bonding partner-recognition-induced 2D crystallization of alkyl chains makes the flexible alkyl chains act as rigid spacers to continuously tune the pore size of the networks with an accuracy of one carbon atom per step.

    15. Calixarenes

      Bis(metallo) Capsules Based on Two Ionic Diphosphines (pages 2431–2443)

      Dr. Tehila S. Koblenz, ing. Henk L. Dekker, Prof. Dr. Chris G. de Koster, Prof. Dr. Piet W. N. M. van Leeuwen and Prof. Dr. Joost N. H. Reek

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/asia.201100073

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      Pair-up! Simultaneous encapsulation of two different transition metals is achieved by self-assembly of a transition-metal complex containing a tetracationic ligand (Pd, Pt) and a transition-metal complex containing a tetraanionic ligand (Rh). These complexes may be useful to invoke new reactions (see figure).

    16. Supramolecular Capsules

      Diphosphine Capsules for Transition-Metal Encapsulation (pages 2444–2462)

      Dr. Tehila S. Koblenz, Henk L. Dekker, Prof. Dr. Chris G. de Koster, Prof. Dr. Piet W. N. M. van Leeuwen and Prof. Dr. Joost N. H. Reek

      Version of Record online: 9 JUN 2011 | DOI: 10.1002/asia.201100092

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      From ligands to capsules! It is shown that functionalized diphosphine ligands form capsules with calix[4]arenes that have complementary functional groups (see picture). The approach is general; it has been demonstrated for a series of ligands. Metal complexes of these ligands also form capsules, thus setting the stage for capsule-controlled catalysis.

    17. Organocatalysis

      Linking Conformational Flexibility and Kinetics: Catalytic 1,4-Type Friedel–Crafts Reactions of Phenols Utilizing 1,3-Diamine-Tethered Guanidine/Bisthiourea Organocatalysts (pages 2463–2470)

      Dr. Yoshihiro Sohtome, Bongki Shin, Natsuko Horitsugi, Prof. Dr. Keiichi Noguchi and Prof. Dr. Kazuo Nagasawa

      Version of Record online: 14 JUL 2011 | DOI: 10.1002/asia.201100363

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      Tied together: Our mechanistic studies on the chemo-, regio-, and enantioselective Friedel–Crafts reaction of phenols catalyzed by 1,3-diamine-tethered guanidine/bisthiourea organocatalysts are described (see scheme).

    18. Tandem Reactions

      Microwave-Assisted Tandem Transformation on an Ionic-Liquid Support: Efficient Synthesis of Pyrrolo/Pyridobenzimidazolones and Isoindolinone-Fused Benzimidazoles (pages 2471–2480)

      Suman Thummanagoti, Gorakh S. Yellol and Prof. Dr. Chung-Ming Sun

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/asia.201100277

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      Supporting role: A tandem one-pot transformation (see scheme) that involves the formation of three bonds and two heterocyclic rings has been explored and utilized to develop a rapid and efficient method to synthesize various pyrrolo/pyrido[1,2-a]benzimidazolones and isoindolo[1,2-a]benzimidazolones on an ionic-liquid support under microwave irradiation.

    19. Nanomaterials

      Adsorption of N719 Dye on Anatase TiO2 Nanoparticles and Nanosheets with Exposed (001) Facets: Equilibrium, Kinetic, and Thermodynamic Studies (pages 2481–2490)

      Dr. Jiajie Fan, Dr. Weiquan Cai and Prof. Jiaguo Yu

      Version of Record online: 15 JUN 2011 | DOI: 10.1002/asia.201100188

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      A sticky situation! Adsorption kinetics, isotherms, and thermodynamics of N719 dye on TiO2 nanosheets (TiO2 NS) with dominant (001) facets and TiO2 nanoparticles (TiO2 NP) with dominant (101) facets are investigated. A new understanding is achieved regarding the adsorption process and mechanism of N719 molecules onto TiO2 NS and NP, which should be of great importance for enhancing the performance of dye-sensitized solar cells.

    20. Oxidation

      Precise Design of Artificial Cofactors for Enhancing Peroxidase Activity of Myoglobin: Myoglobin Mutant H64D Reconstituted with a “Single-Winged Cofactor” Is Equivalent to Native Horseradish Peroxidase in Oxidation Activity (pages 2491–2499)

      Dr. Takashi Matsuo, Kazuki Fukumoto, Takuro Watanabe and Prof. Dr. Takashi Hayashi

      Version of Record online: 9 JUN 2011 | DOI: 10.1002/asia.201100107

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      Winging it: Two types of synthetic heme cofactors, “single-winged cofactor” and “double-winged cofactor,” were used to reconstitute H64D myoglobin to enhance the peroxidase activity of the protein. The reconstituted H64D mutant myoglobin with single-winged cofactor exhibits enhancement of peroxidase activity with a small Km value and a large kcat value (see picture).

    21. Nanowires

      Stereoaligned Epitaxial Growth of Single-Crystalline Platinum Nanowires by Chemical Vapor Transport (pages 2500–2505)

      Youngdong Yoo, Sol Han, Minjung Kim, Taejoon Kang, Juneho In and Prof. Bongsoo Kim

      Version of Record online: 18 MAY 2011 | DOI: 10.1002/asia.201100028

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      Go nano! Epitaxial Pt nanowire (NW) arrays are synthesized for the first time by a chemical vapor transport method. Epitaxial growth direction of NWs can be steered by seed crystal morphology. Half-octahedral seeds grow into vertical and horizontal NWs and octahedral seeds grow into inclined NWs possessing six growth directions (see figure).

    22. Nanoparticles

      Oxidative Dissolution of Silver Nanoparticles by Dioxygen: A Kinetic and Mechanistic Study (pages 2506–2511)

      Dr. Chi-Ming Ho, Chi-Kit Wong, Dr. Sammi King-Woon Yau, Dr. Chun-Nam Lok and Prof. Chi-Ming Che

      Version of Record online: 23 MAY 2011 | DOI: 10.1002/asia.201100034

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      Dissolution is the solution! Parameters that govern the dissolution of AgNPs by O2 were investigated. The reaction rate is first-order with respect to [Ag0], [O2], and [Tris]T, and inverse first-order with respect to [Ag+]. On the basis of kinetic and trapping experiments, an amine-activated pathway for the oxidation of AgNPs by O2 is proposed.

    23. C[BOND]H Activation

      Synthesis, Structure, and Reactivity of Hydridoiridium Complexes Bearing a Pincer-Type PSiP Ligand (pages 2512–2521)

      Dr. Hongyun Fang, Dr. Yoong-Kee Choe, Dr. Yonghua Li and Dr. Shigeru Shimada

      Version of Record online: 15 JUN 2011 | DOI: 10.1002/asia.201100085

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      A pincer-type bis(phosphino)silyl ligand ([{2-(R2P)C6H4}2MeSi], PSiP[BOND]R) gives unusually stable iridium(III) N2 complexes [IrIII(H)2(N2)(PSiP[BOND]R)] (see scheme). Substitution of the N2 ligand with PMe3 requires heating at 150 °C. [IrV(H)4(PSiP[BOND]R)] is a useful source of [IrI(PSiP[BOND]R)] and reacts with benzene to form [IrIII(H)(Ph)(PSiP[BOND]R)], which catalyzes a direct borylation reaction of the benzene C[BOND]H bond.

    24. Boron–ate Complexes

      “Design” of Boron-Based Compounds as Pro-Nucleophiles and Co-Catalysts for Indium(I)-Catalyzed Allyl Transfer to Various Csp3-Type Electrophiles (pages 2522–2529)

      Hai Thanh Dao, Dr. Uwe Schneider and Prof. Dr. Shū Kobayashi

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/asia.201100096

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      Getting your carbs! We have developed InI-catalyzed allylations of challenging acetals and ethers by using allyl boronate 2 a as a pro-nucleophile and borinic ester 4 a as a co-catalyst. This conceptually new approach correlates the Lewis acidity of “electrophilic” boron-based compounds with their “nucleophilic” reactivity in Csp3–Csp3 couplings. Our concept is applicable to the selective synthesis of carbohydrate derivatives.

    25. Nanotubes

      Dispersible Shortened Boron Nitride Nanotubes with Improved Molecule-Loading Capacity (pages 2530–2535)

      Dr. Chunyi Zhi, Prof. Nobutaka Hanagata, Prof. Yoshio Bando and Prof. Dmitri Golberg

      Version of Record online: 15 JUN 2011 | DOI: 10.1002/asia.201100114

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      Short and sweet! A controllable oxidation process was utilized to shorten boron nitride nanotubes. The shortened boron nitride nanotubes possess remarkably improved dispersibility and molecule-loading capacity (see figure).

    26. Fluorescence

      Synthesis and Photophysical Properties of Dimethoxybis(3,3,3-trifluoropropen-1-yl)benzenes: Compact Chromophores Exhibiting Violet Fluorescence in the Solid State (pages 2536–2544)

      Prof. Dr. Masaki Shimizu, Dr. Youhei Takeda, Masahiro Higashi and Prof. Dr. Tamejiro Hiyama

      Version of Record online: 30 JUN 2011 | DOI: 10.1002/asia.201100176

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      Materials science: Benzene derivatives substituted by two methoxy groups and two (3,3,3-trifluoropropenyl) moieties are found to exhibit violet fluorescence both in solution and in the solid state (see figure). Trifluoromethyl groups participate in the HOMO and LUMO through σ* orbitals of the C[BOND]F bonds and are essential for attaining visible light emission with the compact chromophore.

    27. Aldol Reactions

      Highly Active Copper-Network Catalyst for the Direct Aldol Reaction (pages 2545–2549)

      Dr. Hidetoshi Ohta, Prof. Dr. Yasuhiro Uozumi and Prof. Dr. Yoichi M. A. Yamada

      Version of Record online: 12 JUL 2011 | DOI: 10.1002/asia.201100284

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      When will I Cu again? A highly active solid-phase catechol–copper-network catalyst () promotes the direct aldol reaction of carbonyl compounds and methyl isocyanoacetate. 0.1–1 mol % [Cu] catalyst gave the corresponding oxazolines in yields of up to 99 % with a trans/cis ratio of>99:1.

    28. Cycloaddition Reactions

      Chiral Silver Amides as Effective Catalysts for Enantioselective [3+2] Cycloaddition Reactions (pages 2550–2559)

      Dr. Yasuhiro Yamashita, Takaki Imaizumi, Dr. Xun-Xiang Guo and Prof. Dr. Shū Kobayashi

      Version of Record online: 20 JUL 2011 | DOI: 10.1002/asia.201100246

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      Chiral silver amides: A highly exo-selective asymmetric [3+2] cycloaddition of α-amino ester and α-amino phosphonate Schiff bases with several activated olefins has been demonstrated. A silver complex prepared from silver bis(trimethylsilyl)amide (AgHMDS) and (R)-DTBM-SEGPHOS worked as an efficient chiral base catalyst without any additional bases (see scheme).

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      Version of Record online: 9 AUG 2011 | DOI: 10.1002/asia.201190039

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