Chemistry – An Asian Journal

Cover image for Vol. 1 Issue 5

November 20, 2006

Volume 1, Issue 5

Pages 637–753

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. Focus Review
    5. Full Papers
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    1. Cover Picture: Metallomacrocycles That Incorporate Cofacially Aligned Diimide Units (Chem. Asian J. 5/2006) (page 637)

      Meisa S. Khoshbin, Maxim V. Ovchinnikov, Khalid S. Salaita, Chad A. Mirkin, Charlotte L. Stern, Lev N. Zakharov and Arnold L. Rheingold

      Version of Record online: 9 NOV 2006 | DOI: 10.1002/asia.200690010

      The weak-link approach is illustrated by the reaction of hemilabile phosphinoalkyl thioether ligands that contain incorporated pyromellitic and naphthalene diimide moieties with [Cu(CH3CN)4]PF6 or [{Rh(norbornadiene)Cl}2]. As a consequence, the two diimide units become cofacially aligned, as shown in the cover picture, within a supramolecular macrocyclic architecture. The introduction of ancillary ligands to the intermediates causes the weak thioether–metal bonds to break, thus generating a large macrocycle in which the distance between diimide units is significantly larger than for the intermediates. For more information, see the Full Paper by C. A. Mirkin and co-workers on page 686 ff.

  2. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. Focus Review
    5. Full Papers
    6. Preview
  3. Focus Review

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. Focus Review
    5. Full Papers
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    1. Carbon-Nanotube-Based Hybrid Materials: Nanopeapods (pages 646–655)

      Ryo Kitaura and Hisanori Shinohara

      Version of Record online: 13 OCT 2006 | DOI: 10.1002/asia.200600162

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      Know your legumes: The structures and properties of various nanopeapods are discussed. Carbon nanotubes can be regarded as excellent templates not only for creating novel hybrid materials with useful properties, but also for exploring theoretical concepts in the physics, chemistry, and materials science of low-dimensional systems.

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. Focus Review
    5. Full Papers
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    1. The Reactive Intermediate of Catalytic Borohydride Reduction by Schiff Base–Cobalt Complexes (pages 656–663)

      Izumi Iwakura, Miho Hatanaka, Ai Kokura, Haruna Teraoka, Taketo Ikeno, Takushi Nagata and Tohru Yamada

      Version of Record online: 24 OCT 2006 | DOI: 10.1002/asia.200600150

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      No longer a bystander: In enantioselective borohydride reduction catalyzed by optically active ketoiminatocobalt(II) complexes, the dichloromethylcobalt hydride is probably the reactive intermediate. The sodium cation also has a crucial effect on the transition state. These conclusions are based on experimental observations and theoretical analysis.

    2. Synthesis of Anatase TiO2 Nanoparticles with β-Cyclodextrin as a Supramolecular Shell (pages 664–668)

      Landong Li, Xiaohong Sun, Yali Yang, Naijia Guan and Fuxiang Zhang

      Version of Record online: 6 OCT 2006 | DOI: 10.1002/asia.200600103

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      CDs for high quality: Homogeneous, highly crystalline pure anatase TiO2 can be made by hydrothermal synthesis in the presence of β-cyclodextrin (β-CD). During this process, the β-CDs self-assemble into long chains and regular clusters, which is crucial for the formation of uniform TiO2 nanoparticles.

    3. Polymer-Assisted Solution-Phase Synthesis and Neurite-Outgrowth-Promoting Activity of 15-Deoxy-Δ12,14-PGJ2 Derivatives (pages 669–677)

      Hiroshi Tanaka, Tsuyoshi Hasegawa, Narumi Kita, Hiroko Nakahara, Takahiro Shibata, Sho Oe, Makoto Ojika, Koji Uchida and Takashi Takahashi

      Version of Record online: 20 OCT 2006 | DOI: 10.1002/asia.200600172

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      A catalogue could come in handy: A library of rac-15-deoxy-Δ12,14-PGJ2 derivatives can be built up efficiently by making use of a cyclopentenone with a vinyl iodide group and polymer-supported catalysts in solution. The side-chains of these PGJ2 derivatives play a major role in modulating their biological activity.

    4. Anions and Polyanions of Oligoindenopyrenes: Modes of Electron Delocalization and Dimerization (pages 678–685)

      Ivan Aprahamian, Hermann A. Wegner, Tamar Sternfeld, Karsten Rauch, Armin de Meijere, Tuvia Sheradsky, Lawrence T. Scott and Mordecai Rabinovitz

      Version of Record online: 13 OCT 2006 | DOI: 10.1002/asia.200600174

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      Take charge of the ring: The charge density calculated for dianions of oligoindenopyrenes by using 13C NMR chemical shifts show that the added charge resides mainly in the five-membered rings. This phenomenon in turn affects the aromaticity of the anions.

    5. Metallomacrocycles That Incorporate Cofacially Aligned Diimide Units (pages 686–692)

      Meisa S. Khoshbin, Maxim V. Ovchinnikov, Khalid S. Salaita, Chad A. Mirkin, Charlotte L. Stern, Lev N. Zakharov and Arnold L. Rheingold

      Version of Record online: 11 OCT 2006 | DOI: 10.1002/asia.200600205

      Thumbnail image of graphical abstract

      Face to face: Pyromellitic diimide and naphthalene diimide moieties can be incorporated into hemilabile ligands, which react with RhI and CuI sources by the weak-link approach to form metallomacrocycles. These complexes also exhibit reversible ligand-induced redox behavior.

    6. Coordination Behavior of Sterically Protected Phosphaalkenes on the AuCl Moiety Leading to Catalytic 1,6-Enyne Cycloisomerization (pages 693–700)

      Matthias Freytag, Shigekazu Ito and Masaaki Yoshifuji

      Version of Record online: 13 OCT 2006 | DOI: 10.1002/asia.200600155

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      All keen on gold: Novel monomeric gold(I) complexes can be synthesized by use of kinetically stabilized phosphaalkene ligands that contain a P[DOUBLE BOND]C[BOND]C[DOUBLE BOND]P, P[DOUBLE BOND]C[BOND]S, or P[DOUBLE BOND]C[BOND]P group. The coordination to gold and structural characteristics correlate with the phosphaalkenes employed. Some phosphaalkene–gold complexes catalyze the cycloisomerization of 1,6-enynes.

    7. Crystalline Vanadium Pentoxide with Hierarchical Mesopores and Its Capacitive Behavior (pages 701–706)

      Hongtao Liu, Ping He, Zhiying Li, Danzi Sun, Haiping Huang, Jinghong Li and Guoyi Zhu

      Version of Record online: 13 OCT 2006 | DOI: 10.1002/asia.200600169

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      Two's better than one: The cotemplate consisting of a cationic surfactant called CTAB and an ionic liquid called BMIC can be used to synthesize crystalline vanadium pentoxide with hierarchical mesopores. The product formed with equimolar quantities of the template reagents has a large capacitance and could be useful in electrochemical capacitors.

    8. Kinetic Studies Prove High Catalytic Activity of a Diene–Rhodium Complex in 1,4-Addition of Phenylboronic Acid to α,β-Unsaturated Ketones (pages 707–711)

      Asato Kina, Yuichi Yasuhara, Takahiro Nishimura, Hiroshi Iwamura and Tamio Hayashi

      Version of Record online: 9 NOV 2006 | DOI: 10.1002/asia.200600184

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      The War of the Rhodiums: In the 1,4-addition of phenylboronic acid to α,β-unsaturated ketones, a diene–rhodium catalyst has a much higher catalytic activity than a phosphine–rhodium catalyst. The rate-determining transmetalation step in the catalytic cycle has a large rate constant when the diene–rhodium catalyst is used. [Rh]=Rh(binap) or Rh(1,5-cyclooctadiene), Sol=solvent.

    9. One-Pot Synthesis of Lactams from Cycloalkanes and tert-Butyl Nitrite by Using N-Hydroxyphthalimide as Key Catalyst (pages 712–716)

      Masaharu Hashimoto, Satoshi Sakaguchi and Yasutaka Ishii

      Version of Record online: 20 OCT 2006 | DOI: 10.1002/asia.200600187

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      Cooking without salt: The synthesis of commercially important lactams from cycloalkanes without the formation of any salt by-products such as ammonium sulfate is a long-term goal in industrial chemistry. The one-pot reaction of cycloalkanes with tBuONO in the presence of N-hydroxyphthalimide as a key catalyst is environmentally benign and leads to lactams and/or oximes in good yields.

    10. Synthesis of Urea-Tethered Disaccharides in Water (pages 717–723)

      Yoshiyasu Ichikawa, Yohei Matsukawa, Mari Tamura, Fumiyo Ohara, Minoru Isobe and Hiyoshizo Kotsuki

      Version of Record online: 20 OCT 2006 | DOI: 10.1002/asia.200600190

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      U rea-lly can! A novel approach to the synthesis of urea-tethered disaccharides in aqueous media has been developed. Reaction of Steyermark-type gluco- and galactopyranosyl oxazolidinones with 4-aminohexopyranose in water proceeds smoothly to afford the urea-tethered lactose and cellobiose analogues. PMP=p-methoxyphenyl.

    11. Asymmetric Baylis–Hillman Reactions Promoted by Chiral Imidazolines (pages 724–729)

      Junye Xu, Yanyi Guan, Shihui Yang, Yurui Ng, Guangrong Peh and Choon-Hong Tan

      Version of Record online: 19 OCT 2006 | DOI: 10.1002/asia.200600191

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      Slow but steady: Novel chiral imidazolines promote the asymmetric Baylis–Hillman reactions of aromatic aldehydes with alkyl vinyl ketones or unactivated acrylates, resulting in high yields and ee. The chiral imidazolines are easy to synthesize and can be readily recovered for reuse without loss of product enantioselectivity.

    12. Metallodielectric Hollow Shells: Optical and Catalytic Properties (pages 730–736)

      Isabel Pastoriza-Santos, Jorge Pérez-Juste, Susana Carregal-Romero, Pablo Hervés and Luis M. Liz-Marzán

      Version of Record online: 20 OCT 2006 | DOI: 10.1002/asia.200600194

      Thumbnail image of graphical abstract

      As good as gold: A method to synthesize metallodielectric hollow shells with tunable optical properties in the visible and the NIR has been developed through the combination of the layer-by-layer technique and sol–gel processes (see scheme). The presence of gold nanoparticles and the porosity of the SiO2 or TiO2 shell make these materials interesting as catalysts.

    13. Nd-Doped TiO2 Nanorods: Preparation and Application in Dye-Sensitized Solar Cells (pages 737–741)

      Qiaohong Yao, Junfeng Liu, Qing Peng, Xun Wang and Yadong Li

      Version of Record online: 20 OCT 2006 | DOI: 10.1002/asia.200600195

      Thumbnail image of graphical abstract

      Catching sun: Monodispersed Nd-doped TiO2 nanorods (20 nm×2 nm) were synthesized by solvothermal methods and characterized by TEM (shown), XRD, and EDS. The nanorods were used to modify conventional TiO2 photoanodes in dye-sensitized solar cells. The modification led to a greater efficiency in the conversion of incident photons into current.

    14. Amine-Templated One-Dimensional Metal Sulfates Including a Mixed-Valent Fe Compound with a Half-Kagome Structure (pages 742–750)

      J. N. Behera and C. N. R. Rao

      Version of Record online: 9 NOV 2006 | DOI: 10.1002/asia.200600083

      Thumbnail image of graphical abstract

      Wired up: Six organic-amine-templated transition-metal sulfates with one-dimensional wirelike structures, one of which is a mixed-valent Fe compound with the half-kagome structure ([C4N2H12][H3O][FeIIIFeII F6(SO4)], see picture), were synthesized under solvo/hydrothermal conditions and characterized. The sulphate group was shown to play an important role in building the different architectures.

  5. Preview

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. Focus Review
    5. Full Papers
    6. Preview
    1. You have free access to this content
      Preview: Chem. Asian J. 6/2006 (page 753)

      Version of Record online: 9 NOV 2006 | DOI: 10.1002/asia.200690012

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