Chemistry – An Asian Journal

Cover image for Vol. 5 Issue 1

January 4, 2010

Volume 5, Issue 1

Pages 1–183

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. Cover Picture: Chiral Metallacrown Supramolecular Compartments that Template Nanochannels: Self-Assembly and Guest Absorption (Chem. Asian J. 1/2010) (page 1)

      Choong-Sun Lim, Joseph Jankolovits, Jeff W. Kampf and Vincent L. Pecoraro

      Article first published online: 23 DEC 2009 | DOI: 10.1002/asia.200990045

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      Molecular containers have drawn intense interest for their ability to selectively recognize and influence the chemistry of guest molecules. A host–guest chemistry approach to synthesizing large containers capable of absorbing large guests is presented. V. Pecoraro et al. show that LaIII[15-equation image-5] selectively recognizes saturated C7 and C8 dicarboxylates, with the guests bound to copper ring metals on the hydrophilic face of four metallocrown hosts. This unprecendented tetrameric metallocrown complex dimerizes through ligand side-chain interactions to form a novel octameric hydrophilic compartment that is accessible through a specific sized opening. For further details, turn to their Full Paper on page 46 ff.

  2. Editorial

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    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. You have free access to this content
      In Good Company (pages 4–7)

      Brian Johnson

      Article first published online: 22 DEC 2009 | DOI: 10.1002/asia.200900673

  3. Graphical Abstract

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    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. Graphical Abstract: Chem. Asian J. 1/2010 (pages 8–15)

      Article first published online: 23 DEC 2009 | DOI: 10.1002/asia.200990048

  4. News

    1. Top of page
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    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
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    1. Spotlights on our sister journals: Chem. Asian J. 1/2010 (pages 16–18)

      Article first published online: 23 DEC 2009 | DOI: 10.1002/asia.200990046

  5. Focus Reviews

    1. Top of page
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    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. Clathrate Hydrates

      Physicochemical Properties of Ionic Clathrate Hydrates (pages 22–34)

      Kyuchul Shin, Jong-Ho Cha, Yongwon Seo and Huen Lee

      Article first published online: 16 SEP 2009 | DOI: 10.1002/asia.200900219

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      Icy functional materials: Ionic clathrate hydrates are considered for their potential applicability in various fields, including those that involve solid electrolytes, gas separation, and gas storage. This Focus Review concentrates on the physicochemical properties and the notable characteristics of the ionic clathrate hydrates.

    2. Nanostructures

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      Silica-Coated Metal Nanoparticles (pages 36–45)

      Shuhua Liu and Ming-Yong Han

      Article first published online: 18 SEP 2009 | DOI: 10.1002/asia.200900228

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      Remember your coat! The up-to-date synthesis strategies, improved properties, and emerging applications of silica-coated metal nanoparticles are discussed. In particular, the large scale synthesis of silica-coated metal nanoparticles and the recent development of hollowed-out silica-coated metal nanoparticles by silica dissolution are emphasized for new and practical applications.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
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    1. Host–Guest Systems

      Chiral Metallacrown Supramolecular Compartments that Template Nanochannels: Self-Assembly and Guest Absorption (pages 46–49)

      Choong-Sun Lim, Joseph Jankolovits, Jeff W. Kampf and Vincent L. Pecoraro

      Article first published online: 30 NOV 2009 | DOI: 10.1002/asia.200900612

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      Bigger is better: With the appropriate guest and lanthanide central metal, chiral 15-metallacrown-5 hosts form 11,600 Dalton octameric nanoscale compartments. Notably, these massive molecular containers are accessible to guests in the solid state through the 2.4 nm diameter solvent channels that run through the crystal lattice. The absorption of large guest molecules at the solid–liquid interface is demonstrated.

    2. Nanomaterials

      Flexible and Transparent Silicon Nanoparticle/Polymer Composites with Stable Luminescence (pages 50–55)

      Keisuke Sato, Naoki Fukata, Kenji Hirakuri, Miwa Murakami, Tadashi Shimizu and Yusuke Yamauchi

      Article first published online: 10 DEC 2009 | DOI: 10.1002/asia.200900403

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      Flexible and transparent silicon nanoparticle (Si-NP)/polymer composites possess high quantum yields and robust photostability for luminescence across the entire visible spectrum when stored in a variety of solvents and/or atmospheres. Moreover, the Si-NP/polymer composites in the form of films, fibers, tubes, and bowl shapes, which were prepared by using various molds, enable excellent luminescence performance despite their shape deformation.

    3. Aptamers

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      Engineering Dendritic Aptamer Assemblies as Superior Inhibitors of Protein Function (pages 56–59)

      Youngmi Kim, Donn M. Dennis, Tim Morey, Liu Yang and Weihong Tan

      Article first published online: 4 DEC 2009 | DOI: 10.1002/asia.200900421

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      Branching out: A new method has been developed for designing superior inhibitors of protein function by assembling heterogeneous aptamers into dendritic aptamer assemblies composed of two different functional domains: an anchor and a dendrimer-like inhibitor (27Apt and 15Apt, respectively). The engineering of this heterogeneous ligand assembly enhances molecular function for thrombin binding, and provides novel advantages and further improves inhibitory efficacy.

    4. Electron Transfer

      Organoplatinum(II) Complexes with Chromophore–Acceptor Dyad Studied by Ultrafast Time-Resolved Absorption Spectroscopy (pages 60–65)

      Siu-Wai Lai, Yong Chen, Wai-Ming Kwok, Xi-Juan Zhao, Wai-Pong To, Wen-Fu Fu and Chi-Ming Che

      Article first published online: 11 DEC 2009 | DOI: 10.1002/asia.200900304

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      Femtosecond time-resolved absorption revealed the formation of charged-separated [ClPtIII{CNN(PhMV+⋅)}] species (left) with a forward rate constant of about 1012 s−1, which is more rapid than that of the back electron-transfer process (k−1=1.6×109 s−1). Similar slower back ET reaction than forward light-induced ET reaction of [Pt(MV-bpy)(C[TRIPLE BOND]CPh)2](PF6)2 (right) has been observed. MV=methyl viologen.

    5. Photocatalysis

      MoO3 in Self-Organized TiO2 Nanotubes for Enhanced Photocatalytic Activity (pages 66–69)

      Pankaj Agarwal, Indhumati Paramasivam, Nabeen K. Shrestha and Patrik Schmuki

      Article first published online: 11 DEC 2009 | DOI: 10.1002/asia.200900369

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      Self-organized nanostructures (nanotubes and nanopores) consisting of TiO2-MoO3 were grown on Ti-Mo substrates with different Mo contents (7 wt % Mo, 20 wt % Mo, and 35 wt % Mo) by electrochemical anodization. The photocatalytic activity of these oxide layers was compared with TiO2 nanotubes. The results show clearly that MoO3 doping of about 7 wt % (Ti 7Mo in picture) strongly enhances the achievable photodegradation ability of titania nanotubes.

    6. Nanomaterials

      Biomodulation Approach for Gold Nanoparticles: Synthesis of Anisotropic to Luminescent Particles (pages 70–73)

      Jadab Sharma, Yian Tai and Toyoko Imae

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200900316

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      Fruit salad nanoparticles: A simple biomodulation approach has been developed using extracts of apple (Malus domestica), lemon (Citrus limonia), tomato (Lycopersicon esculentum), and banana peel (Musa cavendish) to generate various nanostructures of gold, for example, spherical, marigold-like, and triangular plates. The synthesis of luminescent gold nanoparticles using fluorescent catabolites of chlorophyll is also demonstrated.

    7. Substituted Furans

      CuI/L-Proline-Catalyzed Coupling of Substituted 3-Iodoprop-2-en-1-ols with 1-Alkynes and Subsequent Cyclization: A Convenient Approach for Synthesizing Polysubstituted Furans (pages 74–76)

      You Wang, Lanting Xu and Dawei Ma

      Article first published online: 10 DEC 2009 | DOI: 10.1002/asia.200900523

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      Coming full circle: CuI/L-proline-catalyzed coupling of substituted 3-iodoprop-2-en-1-ols and terminal alkynes followed by copper-mediated cycloisomerization produced furans in good yields. This method allows the assembly of 2,3,4- and 2,3,5-trisubstituted furans, as well as 2,3,4,5-tetrasubstituted furans.

  7. Full Papers

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

      Mechanistic Insights into Selectivity Control for Heterogeneous Olefin Oxidation: StyreneOxidation on Au(111) (pages 78–86)

      Ryan G. Quiller, Xiaoying Liu and Cynthia M. Friend

      Article first published online: 14 DEC 2009 | DOI: 10.1002/asia.200900399

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      One way or the other: This work establishes important reaction mechanisms of styrene oxidation on gold involving two oxametallacycles that undergo ring-closure to form epoxide and competing tranformations to form acetophenone, phenylketene, and benzeneacetic acid. Coverage-dependent studies suggest that the selectivity toward epoxidation strongly depends on the surface concentrations of styrene and oxygen, proving insight into selectivity control for heterogeneous olefin oxidation.

    2. Solar Cells

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      1-Alkyl-1H-imidazole-Based Dipolar Organic Compounds for Dye-Sensitized Solar Cells (pages 87–96)

      Marappan Velusamy, Ying-Chan Hsu, Jiann T. Lin, Che-Wei Chang and Chao-Ping Hsu

      Article first published online: 18 NOV 2009 | DOI: 10.1002/asia.200900244

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      Shining through: Donor–π–acceptor-type organic dyes based on 1-alkyl-1H-imidazole spacers 15 have been developed and characterized. Detailed investigation on the relationship between the structure, spectral and electrochemical properties, and performance of dye-sensitized solar cell (DSSC) is described here. Good efficiencies are observed, with respect to that of a N719-based device fabricated and measured under similar conditions.

    3. Polyoxometalates

      Towards the Accurate Calculation of 183W NMR Chemical Shifts in Polyoxometalates: The Relevance of the Structure (pages 97–104)

      Laia Vilà-Nadal, José Pedro Sarasa, Antonio Rodríguez-Fortea, Joan Igual, Leonid P. Kazansky and Josep M. Poblet

      Article first published online: 4 DEC 2009 | DOI: 10.1002/asia.200900263

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      Alleviation of a deviation: To have precise structures is a sine qua non condition to compute accurate tungsten NMR chemical shifts in polyoxometalates. Using optimal structures computed with large basis sets of QZ4P quality, we have found average deviations lower than 10 ppm for a series of typical polyoxometalates.

    4. Photovoltaic Cells

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      Solution-Processed Bulk Heterojunction Photovoltaic Cells from Gradient π-Conjugated Thienylene Vinylene Dendrimers (pages 105–113)

      Jin-Liang Wang, Chengmei Zhong, Zheng-Ming Tang, Hongbin Wu, Yuguo Ma, Yong Cao and Jian Pei

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200900245

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      A series of gradient π-conjugated dendrimers and their corresponding models based on 5,5,10,10,15,15-hexahexyltruxene moieties as nodes and oligo(thienylene vinylene) (OTVs) units with different lengths as branching arms was developed as active materials for photovoltaic cells. The power conversion efficiency of the devices based on G0-4-2 (see picture) was 0.40 %, which is the highest recorded value for OTV-based materials to date.

    5. Corroles

      Pyridyl-Substituted Corrole Isomers: Synthesis and their Regulation to G-quadruplex Structures (pages 114–122)

      Heng Ma, Ming Zhang, Dan Zhang, Rong Huang, Yang Zhao, Hao Yang, Yijing Liu, Xiaocheng Weng, Yangyang Zhou, Minggang Deng, Liang Xu and Xiang Zhou

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200900270

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      Act and interact: Surface plasmon resonance (SPR) is used to compare the interactions of five cationic methylpyridylium corroles with different types of G-quadruplexes such as cmyc, htelo, and bcl2. The analysis shows a high selectivity of the G-quadruplexes to double-stranded DNA. These interactions are investigated with CD, Tm, PCR-stop (PCR=polymerase chain reaction), and polymerase-stop assays.

    6. Gold Microstructures

      Synthesis of Gold Microplates Using Bovine Serum Albumin as a Reductant and a Stabilizer (pages 123–129)

      Leslie Au, Byungkwon Lim, Peter Colletti, Young-Shin Jun and Younan Xia

      Article first published online: 4 DEC 2009 | DOI: 10.1002/asia.200900468

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      A double agent exposed: Bovine serum albumin (BSA), a globular protein, was employed as both the reductant and stabilizer in the preparation of Au microplates with a narrow size distribution through a facile synthetic approach.The hydroxyl groups in BSA served as a weak reducing agent at mild temperatures, thus providing a kinetically controlled pathway to generate seeds with planar defects, which then grow into Au microplates.

    7. Corroles

      Trans-A2B-corroles Bearing a Coumarin Moiety - From Synthesis to Photophysics (pages 130–140)

      Mariusz Tasior, Daniel T. Gryko, Dominika J. Pielacińska, Alberto Zanelli and Lucia Flamigni

      Article first published online: 18 NOV 2009 | DOI: 10.1002/asia.200900345

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      Showdown at the ET corrole! Several dyads comprised of corrole and coumarin units are synthesized, mainly through a one-pot condensation of coumarincarboxaldehydes with 5-(pentafluorophenyl)-dipyrromethane. An efficient energy transfer from the coumarin moiety to corrole takes place in the dyads investigated.

    8. One-Pot Synthesis

      Platinum-Catalyzed Multi-Step Reaction of Propargyl Alcohols with N-Heteroaromatics (pages 141–146)

      Sivakolundu Bhuvaneswari, Masilamani Jeganmohan and Chien-Hong Cheng

      Article first published online: 26 NOV 2009 | DOI: 10.1002/asia.200900318

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      Cooking in only one pot: N-Heteroaromatics including indoles and pyrroles efficiently react with propargyl alcohols in the presence of PtCl2 leading to carbon-3 alkylation of indoles and carbon-2 alkylation of pyrrole.

    9. Nucleophilic Cyclopropanation

      Stereospecific Construction of Chiral Tertiary and Quaternary Carbon by Nucleophilic Cyclopropanation with Bis(iodozincio)methane (pages 147–152)

      Kenichi Nomura and Seijiro Matsubara

      Article first published online: 17 NOV 2009 | DOI: 10.1002/asia.200900289

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      Clear-cut arrangement: When an optically active α,β-epoxy ketone or α-sulfonyloxy ketone is treated with the dizinc, a zinc alkoxide of cyclopropanol having a chiral tertiary or quaternary carbon in the cyclopropane ring is obtained. When it is treated with an electrophile in the presence of copper cyanide, an optically active α-tertiary or -quaternary ketone that retains high optical purity is afforded.

    10. Hydroaromatics

      Synthesis of N-Arylated 1,2-Dihydroheteroaromatics Through the Three-Component Reaction of Arynes with N-Heteroaromatics and Terminal Alkynes or Ketones (pages 153–159)

      Masilamani Jeganmohan, Sivakolundu Bhuvaneswari and Chien-Hong Cheng

      Article first published online: 10 DEC 2009 | DOI: 10.1002/asia.200900324

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      Three-component synthesis: The reaction of benzynes with N-heteroaromatics and pronucleophiles including terminal alkynes and ketones that have an α-hydrogen is shown to give various N-arylated 1,2-dihydro-N-heteroaromatics in good yields.

    11. Organostannonic Acids

      New Insights into the Formation and Reactivity of Molecular Organostannonic Acids (pages 160–168)

      S. Usman Ahmad, Jens Beckmann and Andrew Duthie

      Article first published online: 8 DEC 2009 | DOI: 10.1002/asia.200900436

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      Cluster around: Reaction with (tBu2SnO)3/CO2/H2O, Ph2P(O)OH, and NaH/H2O gives rise to the formation of multinuclear hypercoordinated organostannoxane clusters [tBu2Sn(OH)OSnR(OH)2OC(OSntBu2OH)2(O)SnR(OH)(H2O)]2, [RSn(OH)2(O2PPh2)]2, and Na3(RSn)4O6(OH)3, respectively (R=2,6-Mes2C6H3). In wet solvents, trans-[2,6-Mes2C6H3Sn(O)OH]3 undergoes hydration to give the mononuclear arylstannonic acid 2,6-Mes2C6H3Sn(OH)3.

    12. Tetrathiafulvalenes

      Redox Multifunctionality in a Series of PtII Dithiolene Complexes of a Tetrathiafulvalene-Based Diphosphine Ligand (pages 169–176)

      Su-Kyung Lee, Kyong-Soon Shin, Dong-Youn Noh, Olivier Jeannin, Frédéric Barrière, Jean-François Bergamini and Marc Fourmigué

      Article first published online: 10 DEC 2009 | DOI: 10.1002/asia.200900310

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      One site at a time: The electron-rich Pt dithiolene complex of a tetrathiafulvalene-based chelating diphosphine exhibits four sequential redox processes assigned to the successive oxidations of the two covalently linked but electronically uncoupled Pt/dddt and TTF electrophores.

  8. Preview

    1. Top of page
    2. Cover Picture
    3. Editorial
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    5. News
    6. Focus Reviews
    7. Communications
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    1. Preview: Chem. Asian J. 2/2010 (page 183)

      Article first published online: 23 DEC 2009 | DOI: 10.1002/asia.200990047

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