Chemistry – An Asian Journal

Cover image for Vol. 4 Issue 1

January 5, 2009

Volume 4, Issue 1

Pages 3–211

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Full Papers
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    1. Cover Picture: Photodynamic Activity of C70 Caged within Surface-Cross-Linked Liposomes (Chem. Asian J. 1/2009) (page 3)

      Atsushi Ikeda, Mai Nagano, Motofusa Akiyama, Masashi Matsumoto, Sayuri Ito, Masaru Mukai, Mineo Hashizume, Jun-ichi Kikuchi, Kiyofumi Katagiri, Takuya Ogawa and Tatsuo Takeya

      Version of Record online: 2 JAN 2009 | DOI: 10.1002/asia.200890044

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      C70 encapsulated into a surface-cross-linked liposome (a morphologically stable cerasome) was prepared by an exchange reaction. The photodynamic activity of the cerasome with incorporated C70 in HeLa cells is described by A. Ikeda et al. They show that the cerasome can be used in photodynamic therapy without the need for prior drug release from the cerasome. This indicates an alternative drug-delivery system with high morphological stability which can increase the residence time in blood and achieve tumor-selective drug delivery by the enhanced permeability and retention effect. For more information, see their Full Paper on page 199 ff.

  2. Editorial

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
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    1. You have free access to this content
      Moving Forward (pages 4–6)

      Brian Johnson

      Version of Record online: 2 JAN 2009 | DOI: 10.1002/asia.200800453

  3. Graphical Abstract

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

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

    1. Top of page
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    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
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    1. Molecular Glasses

      Electro-Optic (E-O) Molecular Glasses (pages 20–31)

      Sei-Hum Jang and Alex K-Y. Jen

      Version of Record online: 12 SEP 2008 | DOI: 10.1002/asia.200800179

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      Chromophores coming together: Molecular glasses are a new class of materials for nonlinear optical applications, especially for electro-optic devices. This Focus Review concentrates on the properties and potential uses of molecular glasses based on dendrimers of multiple chromophores, reversible self-assembly of chromophores, and blends of chromophores in the self-assembled chromophore matrices.

    2. Spiro-Skeleton Ligands

      Spiro Skeletons: A Class of Privileged Structure for Chiral Ligand Design (pages 32–41)

      Kuiling Ding, Zhaobin Han and Zheng Wang

      Version of Record online: 4 SEP 2008 | DOI: 10.1002/asia.200800192

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      A strong backbone makes all the difference: A family of chiral ligands based on spirobiindane (see structure, n=0) and spirobifluorene (n=1) backbones have been successfully applied in a wide range of transition-metal-catalyzed asymmetric reactions with superior or comparable enatioselectivities to those obtained by using the related ligands bearing other backbones, proving the spiro skeleton to be a type of privileged structure for chiral ligand design.

  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
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    1. Photoelectronic Properties

      Synthesis of Dibenzochalcogenaborins and Systematic Comparisons of Their Optical Properties by Changing a Bridging Chalcogen Atom (pages 42–49)

      Junji Kobayashi, Keiko Kato, Tomohiro Agou and Takayuki Kawashima

      Version of Record online: 19 NOV 2008 | DOI: 10.1002/asia.200800302

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      Borins ain′t boring: The π-conjugated molecules bearing a boron atom and chalcogen atoms were synthesized. Systematic comparisons on the structures and optical properties were performed. The nature of chalcogen atoms at the bridging position is shown to strongly affect the optical and electronic properties.

    2. Coordination Polymers

      The Assembly of Supramolecular Boxes and Coordination Polymers Based on Bis-Zinc-Salphen Building Blocks (pages 50–57)

      Mark Kuil, Iris M. Puijk, Arjan W. Kleij, Duncan M. Tooke, Anthony L. Spek and Joost N. H. Reek

      Version of Record online: 17 NOV 2008 | DOI: 10.1002/asia.200800147

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      Polymers and boxes! Bis-zinc(II)-salphen building blocks were used to construct organic coordination polymers using short ditopic nitrogen ligands and to construct supramolecular boxes using slightly longer ditopic nitrogen ligands.

    3. Photochromic Diarylethenes

      Self-Assembly of Photochromic Diarylethenes with Amphiphilic Side Chains: Core-Chain Ratio Dependence on Supramolecular Structures (pages 58–66)

      Takashi Hirose, Masahiro Irie and Kenji Matsuda

      Version of Record online: 8 DEC 2008 | DOI: 10.1002/asia.200800340

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      Coming together: Diarylethene derivatives having different lengths and numbers of poly(ethylene glycol) side chains are synthesized and their photochromic property and self-assembling behavior are investigated. The self-assembling behavior of the derivatives is highly dependent upon the proportion of the amphiphilic side chain against the hydrophobic core moiety.

    4. Nanoparticle Uptake

      Inorganic Metal Hydroxide Nanoparticles for Targeted Cellular Uptake Through Clathrin-Mediated Endocytosis (pages 67–73)

      Jae-Min Oh, Soo-Jin Choi, Go-Eun Lee, Jung-Eun Kim and Jin-Ho Choy

      Version of Record online: 5 NOV 2008 | DOI: 10.1002/asia.200800290

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      Small vehicles with big effects! Layered double hydroxide, a potential candidate as a drug-delivery nanovehicle, was synthesized in different sizes and labelled with a fluorophore through a silane coupling reaction. The size-dependent targeted cellular uptake of the nanoparticles through clathrin-mediated endocytosis has been studied.

    5. Heterogeneous Oxidation

      Kinetic Evidence for the Influence of Subsurface Oxygen on Palladium Surfaces Towards CO Oxidation at High Temperatures (pages 74–80)

      Chinnakonda S. Gopinath, Kandasamy Thirunavukkarasu and Sankaranarayanan Nagarajan

      Version of Record online: 10 OCT 2008 | DOI: 10.1002/asia.200800278

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      Oxygen helps: Molecular beam studies with a CO+O2 mixture provide direct proof for CO adsorption on Pd surfaces exhibiting a significant surface and subsurface oxygen coverage (O coverage), with a significant reactive sticking coefficient (rsCO) above 600 K. Subsurface O coverage increases the CO adsorption capacity and the measured rsCO values vary between 0.02 and 0.25. It is likely that a partially oxidized Pd surface might be the reason for its oxidation capacity at high temperatures.

    6. DFT Calculations

      A DFT Study on the Reaction Pathways for Carbon[BOND]Carbon Bond-Forming Reactions between Propargylic Alcohols and Alkenes or Ketones Catalyzed by Thiolate-Bridged Diruthenium Complexes (pages 81–88)

      Ken Sakata, Yoshihiro Miyake and Yoshiaki Nishibayashi

      Version of Record online: 10 OCT 2008 | DOI: 10.1002/asia.200800236

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      Finding common ground: The reaction pathways of two types of carbon–carbon bond-forming reactions catalyzed by thiolate-bridged diruthenium complexes have been investigated by density functional calculations. It is clarified that both carbon[BOND]carbon bond-forming reactions proceed through a ruthenium–allenylidene complex as a common reactive intermediate.

    7. Organic Light-Emitting Diodes

      Phosphorescence Color Tuning by Ligand, and Substituent Effects of Multifunctional Iridium(III) Cyclometalates with 9-Arylcarbazole Moieties (pages 89–103)

      Cheuk-Lam Ho, Qi Wang, Ching-Shan Lam, Wai-Yeung Wong , Dongge Ma, Lixiang Wang, Zhi-Qiang Gao, Chin-Hsin Chen, Kok-Wai Cheah and Zhenyang Lin

      Version of Record online: 10 OCT 2008 | DOI: 10.1002/asia.200800226

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      Fine tuning: Highly efficient color-tunable iridium-based phosphors with 9-arylcarbazole moieties improve the hole-injection/hole-transporting traits and electrophosphorescence efficiency (up to 12 %) relative to the benchmark complex with 2-phenylpyridine. This synthesis offers a new channel for the rational design of heavy-metal electrophosphors by simple derivatization of a rigid carbazole chromophore, which is desirable for various display applications.

    8. Photosensitizers

      Preparation, Spectroscopic Properties, and Stability of Water-Soluble Subphthalocyanines (pages 104–110)

      Hu Xu and Dennis K. P. Ng

      Version of Record online: 4 NOV 2008 | DOI: 10.1002/asia.200800369

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      Water lover: A new series of subphthalocyanines with a water-solubilizing axial group have been prepared and spectroscopically characterized. They can sensitize the formation of singlet oxygen, both in EtOH and in water, rendering them to be potentially used in various photosensitizing applications.

    9. Total Synthesis

      Total Synthesis of (−)-Apratoxin A, 34-Epimer, and Its Oxazoline Analogue (pages 111–125)

      Yoshitaka Numajiri, Takashi Takahashi and Takayuki Doi

      Version of Record online: 25 NOV 2008 | DOI: 10.1002/asia.200800365

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      18-step plan: Total synthesis of the marine natural product apratoxin A and related synthetic analogues is described. Apratoxin A is prepared with an overall yield of 18 % through a synthetic route with a longest linear sequence of eighteen steps.

    10. Diels–Alder Reactions

      On the Effect of Tether Composition on cis/trans Selectivity in Intramolecular Diels–Alder Reactions (pages 126–134)

      Michael N. Paddon-Row, Alistair I. Longshaw, Anthony C. Willis and Michael S. Sherburn

      Version of Record online: 12 NOV 2008 | DOI: 10.1002/asia.200800352

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      Is stereoselectivity at the end of its tether? The influence of tether composition upon stereoselectivity in the intramolecular Diels–Alder reaction is explored computationally and experimentally. The stereochemical outcomes of known reactions are explained and predictions are made for newly designed tethers.

    11. Biospecific Recognition

      Asymmetrically Functionalized, Four-Armed, Poly(ethylene glycol) Compounds for Construction of Chemically Functionalizable Non-Biofouling Surfaces (pages 135–142)

      Young Shik Chi, Bong Soo Lee, Munjae Kil, Hyuk-jun Jung, Eugene Oh and Insung S. Choi

      Version of Record online: 27 NOV 2008 | DOI: 10.1002/asia.200800344

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      Twenty Tween! Asymmetrically functionalized, four-armed, Tween 20 derivatives were designed and synthesized to form stable monomolecular films on Au and SiO2 surfaces. These structurally modified Tween 20 compounds gave the original characteristics of Tween 20, non-biofouling (from ethylene glycol groups) and functionalizable (from OH groups) properties, to each substrate.

    12. Polynuclear Complexes

      Controlling the Structure of Manganese(II) Phosphates by the Choice and Ratio of Organophosphate and Auxiliary Ligands (pages 143–153)

      Ramaswamy Murugavel, Subramaniam Kuppuswamy, Nayanmoni Gogoi, Alexander Steiner, John Bacsa, Ramamoorthy Boomishankar and K. G. Suresh

      Version of Record online: 28 NOV 2008 | DOI: 10.1002/asia.200800317

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      Shapely clusters: Medium-sized metal phosphate clusters were produced by the introduction of a chelating auxiliary ligand, such as 2,2′-bipyridine (bpy), or monodentate N-donor ligands, such as pyridine or pyrazole. The first example of a tetrameric phosphate with D4R secondary building unit structure containing five-coordinate metal ions on the vertices of the cubane and the first tetrameric {(bpy)Mn4} cluster in a staircase conformation are reported.

    13. Triazolyl Ligands

      2-(1 H-1,2,3-Triazol-4-yl)-Pyridine Ligands as Alternatives to 2,2′-Bipyridines in Ruthenium(II) Complexes (pages 154–163)

      Bobby Happ, Christian Friebe, Andreas Winter, Martin D. Hager, Richard Hoogenboom and Ulrich S. Schubert

      Version of Record online: 17 NOV 2008 | DOI: 10.1002/asia.200800297

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      Click on to it: Click chemistry provides a method of straightforward access to versatile functionalized (1H-1,2,3-triazole)-pyridines, which can be considered as analogues to 2,2′-bipyridines. The coordination of these groups to RuII leads to homoleptic and heteroleptic complexes with electro-optical properties that depend on the number of ligands attached to the RuII core.

    14. Macrocycles

      Tetramethyl-m-benziporphodimethene and Isomeric α,β-Unsaturated γ-Lactam Embedded N-Confused Tetramethyl-m-benziporphodimethenes (pages 164–173)

      Gao-Fong Chang, Anil Kumar, Wei-Min Ching, Han-Wei Chu and Chen-Hsiung Hung

      Version of Record online: 4 NOV 2008 | DOI: 10.1002/asia.200800279

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      A little confused: The synthesis of tetramethyl-m-benziporphodimethene isolated two γ-lactam ring containing by-products. The O-down structure forms stronger intermolecular hydrogen bonding in the solid state and gives a higher association constant in solution. DFT calculations confirmed that the keto form is more stable than the enol form.

    15. Microspheres

      Morphogenesis and Crystallization of ZnS Microspheres by a Soft Template-Assisted Hydrothermal Route: Synthesis, Growth Mechanism, and Oxygen Sensitivity (pages 174–180)

      Liangbao Yang, Jun Han, Tao Luo, Minqiang Li, Jiarui Huang, Fanli Meng and Jinhuai Liu

      Version of Record online: 26 SEP 2008 | DOI: 10.1002/asia.200800231

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      Hard from soft: Almost monodisperse ZnS microspheres were synthesized by a hydrothermal route with tungstosilicate acid (TSA) used as a soft template. The structure of the microspheres can be tuned by controlling reaction conditions such as temperature, pH value, and reaction medium. Oxygen sensing is demonstrated for ZnS microspheres deposited on gold electrodes under UV illumination.

    16. Protein Folding

      Synthesis of β-Peptides with β-Helices from New C-Linked Carbo-β-Amino Acids: Study on the Impact of Carbohydrate Side Chains (pages 181–193)

      Gangavaram V. M. Sharma, Kota Sudhakar Rao, Rapolu Ravi, Kongari Narsimulu, Pendem Nagendar, Chirutha Chandramouli, Singarapu Kiran Kumar and Ajit C. Kunwar

      Version of Record online: 12 NOV 2008 | DOI: 10.1002/asia.200800249

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      Helical handedness: Peptides derived from C-linked carbo-β-amino acids (β-Caa) with a D-galactopyranoside side chain and homo-β-Caas with a D-xylofuranoside side chain provide an opportunity to understand the impact of carbohydrate side chains on the formation and stability of helical structures. The study indeed provides useful information on the role of the carbohydrate side chains.

    17. Intermolecular Interactions

      Solid-State Structures and Solution Analyses of a Phenylpropylpyridine N-Oxide and an N-Methyl Phenylpropylpyridine (pages 194–198)

      Isabella Richter, Mark R. Warren, Jusaku Minari, Souad A. Elfeky, Wenbo Chen, Mary F. Mahon, Paul R. Raithby, Tony D. James, Kazuo Sakurai, Simon J. Teat, Steven D. Bull and John S. Fossey

      Version of Record online: 27 OCT 2008 | DOI: 10.1002/asia.200800255

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      It doesn′t always stack up! The crystal structures, fluorescence and NOESY spectra of phenylpropylpyridine-N-oxide and N-methyl-phenylpropylpyridinium iodide are obtained and compared. They all indicate that intramolecular π-stacking is not present in the N-oxide compound.

    18. Photosensitizers

      Photodynamic Activity of C70 Caged within Surface-Cross-Linked Liposomes (pages 199–205)

      Atsushi Ikeda, Mai Nagano, Motofusa Akiyama, Masashi Matsumoto, Sayuri Ito, Masaru Mukai, Mineo Hashizume, Jun-ichi Kikuchi, Kiyofumi Katagiri, Takuya Ogawa and Tatsuo Takeya

      Version of Record online: 1 OCT 2008 | DOI: 10.1002/asia.200800271

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      A fierce fullerene in a cage: C70 encapsulated into a surface-cross-linked liposome (a morphologically stable cerasome) was prepared by an exchange reaction. The photodynamic activity of the cerasome with incorporated C70 in HeLa cells was similar to that of a lipid membrane with incorporated C70, indicating that the cerasome can be used in photodynamic therapy without the need for prior drug release from the cerasome.

  7. Preview

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Full Papers
    8. Preview
    1. Preview: Chem. Asian J. 2/2009 (page 211)

      Version of Record online: 2 JAN 2009 | DOI: 10.1002/asia.200890043

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