Chemistry – An Asian Journal

Cover image for Vol. 6 Issue 5

May 2, 2011

Volume 6, Issue 5

Pages 1109–1271

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Focus Review
    8. Communications
    9. Full Papers
    10. Preview
    1. Cover Picture: Self-Assembly of Lead Chalcogenide Nanocrystals (Chem. Asian J. 5/2011) (page 1109)

      Dr. Zewei Quan, Loriana Valentin-Bromberg, Welley Siu Loc and Prof. Jiye Fang

      Article first published online: 29 APR 2011 | DOI: 10.1002/asia.201190015

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      Self-assembly … … of lead-chalcogenide nanocrystals are discussed by J. Fang et al. in their Focus Review on page 1126 ff. These nanocrystals are categorized by their morphologies, which include nanospheres, nanocubes, nanooctahedra, nanostars, various superstructures, lead-chalcogenide-based multi-component nanocrystals, and their in-situ self-assembly into lead-chalcogenide one-dimensional nanostructures. The novel properties and potential applications of these lead-chalcogenide-containing assemblies in thermoelectric and solar cell applications are highlighted.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Focus Review
    8. Communications
    9. Full Papers
    10. Preview
    1. Inside Cover: Diode-Like IV Characteristics of a Nonplanar Polyaromatic Compound: a Spectroscopic Study of Isolated and Stacked Dibenzo[g,p]chrysene (Chem. Asian J. 5/2011) (page 1110)

      Dr. Shern-Long Lee, Min-Jie Huang, Prof. Chun-hsien Chen, Cheng-I Wang and Prof. Rai-Shung Liu

      Article first published online: 29 APR 2011 | DOI: 10.1002/asia.201190016

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      Electrical Rectification … …of dibenzo[g,p]chrysene (DBC), considered as a small portion of graphene, was discussed by C.-h. Chen and R.-S. Liu et al. in their Full Paper on page 1181 ff. The framework of DBC, an all-hydrocarbon polyaromatic compound, is twisted and the non-planarity is illustrated by the tortoise carapace (see picture). Scanning tunneling spectroscopy (STS) of both isolated and close-packed DBC molecules revealed diode-like I/V behaviors. The more-pronounced electric rectification for the latter is attributed to orbital-mediated tunneling through the HOMO levels of π[BOND]π stacked DBC molecules.

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Focus Review
    8. Communications
    9. Full Papers
    10. Preview
    1. You have free access to this content
  4. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Focus Review
    8. Communications
    9. Full Papers
    10. Preview
    1. Graphical Abstract: Chem. Asian J. 5/2011 (pages 1116–1121)

      Article first published online: 29 APR 2011 | DOI: 10.1002/asia.201190017

  5. News

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

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

      Self-Assembly of Lead Chalcogenide Nanocrystals (pages 1126–1136)

      Dr. Zewei Quan, Loriana Valentin-Bromberg, Welley Siu Loc and Prof. Jiye Fang

      Article first published online: 12 APR 2011 | DOI: 10.1002/asia.201000937

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      Self-control: This review focuses on recent developments in the self-assembly of lead-chalcogenide nanocrystals into superstructures (see picture). Rapid assemblies of lead chalcogenide based multicomponent nanocrystals and the in situ self-assembly into 1D lead chalcogenide nanostructures are also described.

  7. Communications

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

      Synthesis of a Base-Stabilized 1-Hydrosilanimine via NHC-Mediated Dehydrohalogenation of Hydrochlorosilane (pages 1138–1141)

      Haiyan Cui and Prof. Dr. Chunming Cui

      Article first published online: 17 MAR 2011 | DOI: 10.1002/asia.201100022

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      Covering all the bases: Donor-stabilized 1-hydrosilanimine was prepared by dehydrohalogenation of Ar(SiMe3)NSiHCl2 with a less-hindered N-heterocyclic carbene. The steric effects of NHCs have significant influences on the dehydrohalogenation reactions.

    2. Amines

      Ruthenium-Catalyzed One-Pot Aromatic Secondary Amine Formation from Nitroarenes and Alcohols (pages 1142–1146)

      Yong Liu, Wen Chen, Chao Feng and Prof. Dr. Guojun Deng

      Article first published online: 4 MAR 2011 | DOI: 10.1002/asia.201000945

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      Beg, steal, or borrow: The synthesis of aromatic secondary amines has been developed using commercially available [Ru(acac)3]/dppe as the catalyst. Chlorobenzene solvent gave high selectivity, with only trace amounts of imine and tertiary amine observed.

    3. Porphyrins

      Tetraacenaphthoporphyrin: A π-Conjugated Porphyrin with Efficient Light-Activated Anticancer Activity (pages 1147–1150)

      Gaomai Yang, Dr. Libing Liu, Dr. Qiong Yang and Prof. Dr. Shu Wang

      Article first published online: 7 MAR 2011 | DOI: 10.1002/asia.201000892

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      A new π-conjugated porphyrin (TATMPyP) with the Soret band red-shifted to 600 nm has been synthesized and characterized. It shows minimal cytotoxicity even at higher concentration (50 μM) in darkness, while efficiently killing cancer cells (IC50: 0.20 μM) under low-dose light (1.2 J cm−2). π-Conjugated TATMPyP shows great potential in photodynamic therapy applications.

    4. Graphene

      Fast Synthesis of Graphene Sheets with Good Thermal Stability by Microwave Irradiation (pages 1151–1154)

      M. Zhang , S. Liu, X. M. Yin, Z. F. Du, Q. Y. Hao, D. N. Lei, Prof.  Q. H. Li and Prof.  T. H. Wang

      Article first published online: 4 MAR 2011 | DOI: 10.1002/asia.201000776

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      The high microwave adsorption of graphene oxide was used to rapidly prepare graphene sheets. The temperature of highest combustion rate of these sheets in air was 50 K higher than those reduced by an oil bath, thus showing their thermal stability.

  8. Full Papers

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

      Protein-Directed Solution-Phase Green Synthesis of BSA-Conjugated MxSey (M=Ag, Cd, Pb, Cu) Nanomaterials (pages 1156–1162)

      Dr. Peng Huang, Le Bao, Dr. Dapeng Yang, Dr. Guo Gao, Dr. Jing Lin, Dr. Zhiming Li, Chunlei Zhang and Prof. Daxiang Cui

      Article first published online: 21 FEB 2011 | DOI: 10.1002/asia.201000818

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      Green giants: Bovine serum albumin (BSA)-conjugated MxSey (M=Ag, Cd, Pb, Cu) nanomaterials with different shapes and sizes were synthesized in water at room temperature by the protein-directed, solution-phase, green synthesis method.

    2. Polymorphism

      Polymorphism of Amino Acid-Based Dendrons: From Organogels to Microcrystals (pages 1163–1170)

      Dr. Gui-Chao Kuang, Ming-Jun Teng, Prof. Xin-Ru Jia, Prof. Dr. Er-Qiang Chen and Prof. Dr. Yen Wei

      Article first published online: 24 FEB 2011 | DOI: 10.1002/asia.201000529

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      In the balance: Two amino acid-based naphthalene-dendrons display different polymorphic properties in organic solvents. Nap-G1 developed a fibrous network with β-sheet architecture in cyclohexane but exhibited a spherulitic network in mixed solvents while Nap-G2 acts as an efficient organogelator in chloroform but formed crystalline fibers in relatively high polarity solvents (see picture).

    3. Proteins

      HMGB1–Carbenoxolone Interactions: Dynamics Insights from Combined Nuclear Magnetic Resonance and Molecular Dynamics (pages 1171–1180)

      Luca Mollica, Giulia Morra, Giorgio Colombo and Dr. Giovanna Musco

      Article first published online: 3 FEB 2011 | DOI: 10.1002/asia.201000726

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      Drugged and bound: A combination of NMR relaxation and residual dipolar coupling measurements with molecular dynamics simulations have been used to investigate the influence of the anti-inflammatory drug carbenoxolone (CBNX) on the conformational ensemble of box A of high-mobility group B protein (HMGB1; see picture).

    4. Self-Assembly

      Diode-Like IV Characteristics of a Nonplanar Polyaromatic Compound: a Spectroscopic Study of Isolated and Stacked Dibenzo[g,p]chrysene (pages 1181–1187)

      Dr. Shern-Long Lee, Min-Jie Huang, Prof. Chun-hsien Chen, Cheng-I Wang and Prof. Rai-Shung Liu

      Article first published online: 29 MAR 2011 | DOI: 10.1002/asia.201000859

      Thumbnail image of graphical abstract

      Electric Rectification: DBC (dibenzo[g,p]chrysene), an all hydrocarbon polyaromatic compound, exhibits diode-like IV behavior that is significantly enhanced by intermolecular π[BOND]π stacking. This electric rectification is attributed to orbital-mediated tunneling through the HOMO levels of DBC.

    5. Neutral Radicals

      Electronic Stabilization Effect of a Spin-Delocalized Neutral Radical: Synthesis of an 8-Cyano-6-oxophenalenoxyl Derivative and Quantitative Evaluation of the Electronic Spin Structure in terms of Resonance Structures (pages 1188–1196)

      Dr. Shinsuke Nishida , Kazuki Kariyazono, Azusa Yamanaka, Dr. Kozo Fukui, Prof. Kazunobu Sato, Prof. Takeji Takui, Prof. Kazuhiro Nakasuji and Prof. Yasushi Morita

      Article first published online: 1 MAR 2011 | DOI: 10.1002/asia.201000793

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      Solid as a rock: A new 6-oxophenalenoxyl derivative with a cyano group at the 8-position, where large spin density resides, was synthesized and isolated. This neutral radical exhibits remarkably high stability in the solid state in air despite the low steric protection at the 8-position (see picture).

    6. Radicals

      Radical-Transfer Hydroamination of Olefins with N-Aminated Dihydropyridines (pages 1197–1209)

      Dr. Chih-Ming Chou, Dr. Joyram Guin, Dr. Christian Mück-Lichtenfeld, Prof. Dr. Stefan Grimme and Prof. Dr. Armido Studer

      Article first published online: 7 MAR 2011 | DOI: 10.1002/asia.201000881

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      Festival of amination: We have presented an efficient synthesis of N-phthalimidyl, benzamidyl, acetamidyl, carbamoyl, and ureayl derivatives of dihydropyridines and the application of these reagents as precursors for N-centered radicals (see scheme). These aminated dihydropyridines can be used in radical-transfer hydroamination reactions.

    7. Electrochemical Analysis

      Determination of Explosives Using Electrochemically Reduced Graphene (pages 1210–1216)

      Dr. Ti-Wei Chen, Zhen-Huan Sheng, Kang Wang, Feng-Bin Wang and Prof. Xing-Hua Xia

      Article first published online: 8 MAR 2011 | DOI: 10.1002/asia.201000836

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      Explosive discovery: A graphene-based electrochemical sensing platform for sensitive determination of explosive nitroaromatic compounds (NACs) was constructed through electrochemical reduction (ER) of graphene oxide (GO). The ER-GO-modified glassy carbon electrode showed a greatly improved signal that could be ascribed to several factors (see picture).

    8. Hybrid Materials

      Design of Interpenetrated Networks of Mesostructured Hybrid Silica and Nonconductive Poly(vinylidene fluoride)–Cohexafluoropropylene (PVdF–HFP) Polymer for Proton Exchange Membrane Fuel Cell Applications (pages 1217–1224)

      Dr. Franck Pereira, Dr. Alida Chan, Dr. Karine Vallé, Dr. Pascal Palmas, Dr. Janick Bigarré, Dr. Philippe Belleville and Prof. Clément Sanchez

      Article first published online: 24 FEB 2011 | DOI: 10.1002/asia.201000784

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      Hybrid materials: The up-to-date synthetic strategies, sulfonation routes, and conducting properties of hybrid membranes are discussed. In particular, the in situ growth of a functionalized mesoporous silica network inside a hydrophobic polymer is emphasized for new and practical applications (see picture).

    9. Host–Guest Systems

      Metal–Organic Cyclohelicates as Optical Receptors for Glutathione: Syntheses, Structures, and Host–Guest Behaviors (pages 1225–1233)

      Jian Wang, Dr. Hongmei Wu, Cheng He, Liang Zhao and Prof. Chunying Duan

      Article first published online: 1 MAR 2011 | DOI: 10.1002/asia.201000733

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      Sensors: Two trinuclear Zn-based cyclohelicates were achieved by incorporating two amide-containing tridentate chelators in meta-positions of a substituted phenyl ring (see scheme; R=dibenzylamino (PDB) and BODIPY groups (PMB)). The host–guest behavior of the cyclohelical hosts towards GSH (γ-glutamyl-cysteinyl-glycine) and its component amino acids was investigated by spectroscopic titrations.

    10. Fluorescent Probes

      Two-Photon Probes for Zn2+ Ions with Various Dissociation Constants. Detection of Zn2+ Ions in Live Cells and Tissues by Two-Photon Microscopy (pages 1234–1240)

      Dr. Isravel Antony Danish, Chang Su Lim, Dr. Yu Shun Tian, Ji Hee Han, Min Young Kang and Prof. Dr. Bong Rae Cho

      Article first published online: 17 FEB 2011 | DOI: 10.1002/asia.201000720

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      A-tissue a-tissue, we all fall down: A series of Zn2+-ion selective two-photon fluorescent probes with a wide range of dissociation constants (KdTP=8 nM–12 μM) were developed to be able to detect the Zn2+ ions in live cells and intact tissues at a depth of>80 μm without the drawbacks of mistargeting and photobleaching.

    11. Chemical Ligation

      Theoretical Analysis of the Detailed Mechanism of Native Chemical Ligation Reactions (pages 1241–1251)

      Chen Wang, Qing-Xiang Guo and Prof. Yao Fu

      Article first published online: 1 MAR 2011 | DOI: 10.1002/asia.201000760

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      Two becomes one: A systematic theoretical investigation was carried out to fully understand the detailed mechanism of ligation (see scheme). Based on the elucidated mechanism, the reactivity of native chemical ligation (NCL) reactions for various C-terminal amino acids was compared through calculation. The detailed mechanism of auxiliary-mediated peptide ligation was also studied.

    12. Oligomers

      Mapping the Landscape of Potentially Primordial Informational Oligomers: (3′[RIGHTWARDS ARROW]2′)-D-Phosphoglyceric Acid Linked Acyclic Oligonucleotides Tagged with 2,4-Disubstituted 5-Aminopyrimidines as Recognition Elements (pages 1252–1262)

      Dr. Marcos Hernández-Rodríguez, Dr. Jian Xie, Dr. Yazmin M. Osornio and Prof. Dr. Ramanarayanan Krishnamurthy

      Article first published online: 8 MAR 2011 | DOI: 10.1002/asia.201000828

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      Prehistoric pairs: The (3′[RIGHTWARDS ARROW]2′)-phosphodiester glyceric acid backbone containing an acyclic oligomer tagged with 2,4-dioxo-5-aminopyrimidine pairs (see scheme) strongly with complementary adenine-containing DNA and RNA sequences. An eliminative degradation of the acyclic phosphate backbone owing to the acidic hydrogen at the 2′-position hampered studies of the corresponding 2,4-diamino- and 2-amino-4-oxo-5-aminopyrimidine series.

    13. Bioimaging Probes

      Visible Light-Triggered Photoswitchable Diarylethene-Based Iridium(III) Complexes for Imaging Living Cells (pages 1263–1268)

      Wenjuan Tan, Jing Zhou, Prof. Fuyou Li, Prof. Tao Yi and Prof. He Tian

      Article first published online: 10 MAR 2011 | DOI: 10.1002/asia.201000820

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      Switch on your chemistry! Diarylethene-based iridium(III) complexes were developed as phosphorescence probes for imaging living cells. The switchable phosphorescence was controlled by two distinguishable visible-light irradiations in living cells, which showed little damage to the biological sample (see picture).

  9. Preview

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Focus Review
    8. Communications
    9. Full Papers
    10. Preview
    1. You have free access to this content
      Preview: Chem. Asian J. 6/2011 (page 1271)

      Article first published online: 29 APR 2011 | DOI: 10.1002/asia.201190019

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