Chinese Journal of Chemistry

Cover image for Vol. 31 Issue 2

February, 2013

Volume 31, Issue 2

Pages 165–282

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      Cover Picture: Design and Fabrication of a Three Dimensional Spiral Micromixer (Chin. J. Chem. 2/2013) (page 165)

      Jun Yang, Li Qi, Yi Chen and Huimin Ma

      Article first published online: 18 FEB 2013 | DOI: 10.1002/cjoc.201390004

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      The cover picture showsa new three dimensional micromixer which consists of two layers of spiral channels overlapped together in the vertical direction. Based on the principle of Dean effects, the topological structure is beneficial to produce, enhance and sustain the Dean vortices, which can perturb the laminar fluid effectively. The detailed parameters have been optimized by using the computational fluid dynamics software. The results indicate that the erect channel which is connected with the two layers of spiral channels plays a critical role for well mixing. Meanwhile, the effect of mixing has been identified in a fabricated glass-micromixer and the mixing ef?ciency of 90% has been achieved. This micromixer has manifested high mixing efficiency and presents good practicability in the versatile microfluidic systems. More details are discussed in the article by Qi et al. on page 209–214.

  2. Contents

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    1. Contents: Chin. J. Chem. 2/2013 (pages 167–171)

      Article first published online: 18 FEB 2013 | DOI: 10.1002/cjoc.201390005

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    1. Synthesis and Bioactivities of Novel N-(4-(2-Aryloxythiazol-5-yl)but-3-yn-2-yl)benzamides (pages 173–181)

      Youquan Zhu, Pei Liu, Danyang Wang, Jin Zhang, Jie Cheng, Yuan Ma, Xiaomao Zou and Huazheng Yang

      Article first published online: 17 DEC 2012 | DOI: 10.1002/cjoc.201200824

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      A series of novel N-(4-(2-aryloxythiazol-5-yl)but-3-yn-2-yl)benzamide derivatives were designed and synthesized. Some of them provided >80% control of Sclerotinia sclerotiorum at 50 µg/mL and >70% herbicidal activities against B. campestris at 100 µg/mL.

    2. Palladium-Catalyzed Cyclocarbonylation of 2-Halobenzaldehyde and Hydrazines: A Facile Synthesis of 2-Aminoisoindolin-1-ones (pages 182–186)

      Chao Han, Yang Shen, Ping Lu and Yanguang Wang

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cjoc.201200798

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      An efficient procedure for the synthesis of 2-aminoisoindolin-1-ones via a palladium-catalyzed cyclocarbonylation of 2-halobenzaldehydes, hydrazines and carbon monoxide (balloon) is reported.

    3. Ligand-Free Synthesis of 1,4-Disubstituted-1,3-diynes by Iron/Copper Cocatalyzed Homocoupling of Terminal Alkynes (pages 187–194)

      Peipei Wang, Xiaoyan Liu and Songlin Zhang

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cjoc.201200878

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      A simple and efficient protocol for Fe/Cu cocatalyzed oxidative homocoupling reaction of terminal alkynes to symmetrical 1,4-disubstituted-1,3-diynes was presented. The results showed that both CuBr and FeCl3 played crucial roles in the reaction. It is noteworthy that this protocol employs mild, efficient, aerobic and ligand free conditions. The alkynes, including aromatic, heteroaromatic and aliphatic alkynes, were transformed into the corresponding 1,3-diynes in good to excellent yields.

    4. A Highly Sensitive and Selective Fluorescence Chemosensor for Cu2+ and Zn2+ Based on Solvent Effect (pages 195–199)

      Xiaobo Huang, Qian Miao, Lu Wang, Jieming Jiao, Xianjing He and Yixiang Cheng

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cjoc.201200619

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      A novel fluorescence chemosensor 1 based on (R)-binaphthyl-salen can exhibit highly sensitive and selective recognition responses toward Cu2+ by "turn-off" fluorescence quench type in THF/H2O, and Zn2+ by "turn-on" fluorescence enhancement type in CHCl3/CH3CN, respectively, suggesting that solvents can dramatically affect the responsive properties of salan-based chemosensor.

    5. Accurate Prediction of Au[BOND]P Bond Strengths by Density Functional Theory Methods (pages 200–208)

      Haizhu Yu, Dingjia Liu, Zhimin Dang, Dongrui Wang and Yao Fu

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cjoc.201200753

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    6. Design and Fabrication of a Three Dimensional Spiral Micromixer (pages 209–214)

      Jun Yang, Li Qi, Yi Chen and Huimin Ma

      Article first published online: 17 DEC 2012 | DOI: 10.1002/cjoc.201200922

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      A unique 3D micromixer was designed in schematic structure (up left) and fabricated in glass (up right) respectively, which displayed high mixing efficiency (bottom).

    7. Direct Electrochemistry of Hemoglobin on Vertically Aligned Carbon Hybrid TiO2 Nanotubes and Its Highly Sensitive Biosensor Performance (pages 215–220)

      Meichuan Liu, Guohua Zhao, Yiting Tang, Huijie Shi and Nianjun Yang

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cjoc.201200883

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      Controllable hybridization of vertically aligned TiO2 nanotubes (TiO2 NTs) with conductive amorphous carbon is successfully realized using a simple surfactant-assisted method and the in-situ anodic oxidation way. The obtained carbon hybrid TiO2 NTs (C-TiO2 NTs) is proven to serve as an ideal "vessel" for hemoglobin (Hb) immobilization and biosensor applications. Enhanced direct electron transfer (DET) of Hb is well observed on the constructed Hb/C-TiO2 NTs biosensor. The biosensor further exhibits fast response, high sensitivity and stability for the amperometric biosensing of H2O2 with a low detection limit of 3.1×10−8 mol/L.

    8. Electrochemical Determination of Phenylethanolamine A Based on Nafion/MWCNTs/AuNPs Modified Carbon Electrode (pages 221–229)

      Yanjun Lai, Jing Bai, Wei Zhu, Yuezhong Xian and Litong Jin

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cjoc.201200805

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      A novel electrochemical method was developed to detect PEA based on Nafion/MWCNTs/AuNPs/GCE. The synergetic effects of AuNPs, MWCNTs and Nafion amplify the electrochemical signal, achieving high sensitivity and a wide linear range of 0.01 to 10 µmol/L with a detection limit of 0.005 (mol/L.

    9. Enhanced Photocatalytic Activity of Thienyl-Porphyrins-TiO2 for Degradation of 4-Nitrophenol (pages 230–236)

      Wangyang Ma, Jun Li, Jingzhou Liu and Meng Feng

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cjoc.201200420

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      TiO2-based photocatalysts impregnated with Cu(II), Zn(II), Co(II) 5-mono-(2-thienyl)-10,15,20-triphenyl metalloporphyrins respectively, were prepared and characterized. The experiment of photodegradation of 4-nitrophenol in water showed that three photocatalysts all exhibited much higher photoactivity under the visible light irradiation. In addition, the first order rate constants of these photocatalytic reactions were calculated.

    10. An Efficient Method for the Synthesis of Indolo[3,2-c]quinoline Derivatives Catalyzed by Iodine (pages 237–242)

      Yujing Zhou, Meimei Zhang, Mingyue Yin and Xiangshan Wang

      Article first published online: 8 JAN 2013 | DOI: 10.1002/cjoc.201200993

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      The reaction of Schiff base and indole catalyzed by iodine in DMA, subsequently treated with DDQ, gave indolo[3,2-c]quinoline derivatives in good yields.

    11. Synthesis and Characterization of Some N-Aryl-4-nitroimidazoles as Potential Insensitive Energy Materials (pages 243–246)

      Kehui Hou and Zuliang Liu

      Article first published online: 8 JAN 2013 | DOI: 10.1002/cjoc.201201001

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      N-Aryl derivatives of 4-nitroimidazole have been synthesized under CuI/TBAB catalytic system in excellent yields, using KOH as base in DMF solvent.

    12. Direct Asymmetric Aldol Reaction Co-catalyzed by Amphiphilic Prolinamide Phenol and Lewis Acidic Metal on Water (pages 247–255)

      Tao Zhang, Yunxiao Zhang, Zaichun Li, Zhongtai Song, Hao Liu and Jingchao Tao

      Article first published online: 8 JAN 2013 | DOI: 10.1002/cjoc.201201017

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      An approach based on combinations of various water compatible Lewis acids and lipophilic group containing amphiphilic prolinamide co-catalysts has been evaluated for the direct asymmetric Aldol reaction. From the broad screening chloride salts from alkali metal to transition metal lead to the highest stereoselectivities. The optimized catalytic conditions gave anti-products in high enantioselectivities (up to 99% ee) compared to the moderately stereoselective procedure based on prolinamide activation only.

    13. 3D Ni(II)/Cu(II) Supermolecular Frameworks Based on Pyridylamine and Fumarate Co-ligands Containing a Trinodal (4,5,6)-Connected Network and a (H2O)16 Water Cluster (pages 256–262)

      Yifan Kang, Qing Liu, Wenting Yin, Wentao Zhang and Ping Liu

      Article first published online: 8 JAN 2013 | DOI: 10.1002/cjoc.201200851

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      N-Aryl derivatives of 4-nitroimidazole have been synthesized under CuI/TBAB catalytic system in excellent yields, using KOH as base in DMF solvent.

    14. Synthesis of 2-Aminoindole Derivatives with Hantzsch Ester Catalyzed by Pd/C (pages 263–266)

      Ruiguang Xing, Qiuping Tian, Qiang Liu and Yanan Li

      Article first published online: 17 DEC 2012 | DOI: 10.1002/cjoc.201200834

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    15. A Simple and Efficient Copper(II) Complex as a Catalyst for N-Arylation of Imidazoles (pages 267–270)

      Yanli Jiao, Nannan Yan, Jianwei Xie, Xiaowei Ma, Ping Liu and Bin Dai

      Article first published online: 8 JAN 2013 | DOI: 10.1002/cjoc.201201121

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    16. A Highly Selective Colorimetric Sensor for Cu2+ Based on Phenolic Group Biscarbonyl Hydrazone (pages 271–276)

      Junjian Li, Ying Guo, Hong Yao, Qi Lin, Yongqiang Xie, Taibao Wei and Youming Zhang

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cjoc.201200741

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