Chinese Journal of Chemistry

Cover image for Vol. 32 Issue 8

Early View (Online Version of Record published before inclusion in an issue)

Editors: Guozhen Ji, Shengming Ma

Online ISSN: 1614-7065

Associated Title(s): Chemistry - A European Journal, Chemistry – An Asian Journal, Israel Journal of Chemistry, The Chemical Record

VIEW

  1. 1 - 18
  1. Full Papers

    1. Impact of Magnesium(II) on Beryllium Fluorides in Solutions Studied by 19F NMR Spectroscopy

      Yixiang Liu, Xian Mao, Maili Liu and Ling Jiang

      Article first published online: 25 AUG 2014 | DOI: 10.1002/cjoc.201400265

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      The impact of magnesium(II) on beryllium fluorides was systematically elucidated by 19F NMR spectroscopy. BeF42− was found to be most affected by magnesium(II) after ionic strength correction. Mechanism of the effects is proposed involving ion pair formation between Mg2+ and beryllium fluoride.

    2. Sonochemical Synthesis of Graphene Oxide-Wrapped Gold Nanoparticles Hybrid Materials: Visible Light Photocatalytic Activity

      Yi Cui, Ding Zhou, Zhuyin Sui and Baohang Han

      Article first published online: 25 AUG 2014 | DOI: 10.1002/cjoc.201400309

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      Graphene oxide (GO)-wrapped gold nanoparticles (Au NPs) hybrid materials are constructed via one-pot sonochemical synthesis and self-assembly, using ethylene glycol as the reducing agent. The obtained materials possess enhanced photocatalytic activity under visible light irradiation, owing to the synergistic effect of the two components in the hybrid materials.

    3. Theoretical Studies on the Reactions of 1,1,2,2,3,3,4-Heptafluorocyclopentane with Hydroxyl and Hydrogen Free Radicals

      Dayong Lu, Mingyong Chao and Xiaomeng Zhou

      Article first published online: 25 AUG 2014 | DOI: 10.1002/cjoc.201400319

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      Ab inito and density functional theory are used to deduce the possible reaction pathways for the reactions of 1,1,2,2,3,3,4-heptafluorocyclopentane (F7A) with hydroxyl and hydrogen free radicals at the CCSD/cc-pVDZ//B3LYP/6-311++G(d,p) level of theory.

    4. N-Heterocyclic Carbene-catalyzed Reactions of o-Aminonitriles with Carbonyl Compounds Approach to 2,3-Dihydroquinazolin-4(1H)-ones

      Hongxin Chai, Jiarong Li, Liupan Yang, Mingxing Liu, Deli Yang, Qi Zhang and Daxin Shi

      Article first published online: 25 AUG 2014 | DOI: 10.1002/cjoc.201400381

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      Efficient procedure for the synthesis of 2,3-dihydroquinazolin-4(1H)-one derivates catalyzed by N-heterocyclic carbene.

    5. Enantioselective Construction of Functionalized Thiochromans via Squaramide-Catalyzed Asymmetric Cascade Sulfa-Michael/Michael Addition

      Yi Yang and Daming Du

      Article first published online: 25 AUG 2014 | DOI: 10.1002/cjoc.201400391

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      An efficient enantioselective cascade sulfa-Michael/Michael addition reaction of trans-3-(2-mercaptophenyl)-2-propenoic acid ethyl ester with nitroalkenes catalyzed by a chiral squaramide catalyst was disclosed. This cascade reaction afforded thiochroman derivatives with three contiguous stereocenters in high yields (up to 94%), excellent diastereoselectivities (up to >25:1 dr) and enantioselectivities (up to 99% ee).

    6. Polyvinylpyrrolidone as an Efficient Stabilizer for Silver Nanoparticles

      Weidong Huang, Linxia Zhang, Qiuping Yang and Zhimin Wang

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400349

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      Surfactants screening demonstrated that PVP was an satisfactory stabilizer for AgNPs, which not only was effective at low concentration (0.1%, V/V), but also could protect silver colloids from aggregation for a long period at 1 mol·L−1 NaCl, and 6 h even at 3 mol·L−1 NaCl. It is worth pointing out that aggregation induced by salt is an irreversible process, that is, if sufficient NaCl solution was first added to silver colloids, the aggregated nanoparticles would not disperse nomatter which surfactant was added. The blue and red in the syringes represent surfactants and NaCl, respectively.

    7. A New Cyclization/Decarboxylation Reaction of Isatins with Acyl Chlorides for the Facile Synthesis of 3-Alkenyl-Oxindoles

      Lin Chen, Zhijun Wu, Lin Peng, Qilin Wang, Xiaoying Xu and Lixin Wang

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400320

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      The first cyclization/decarboxylation reaction of isatins with acyl chlorides promoted by 4-dimethylaminopyridine (DMAP) was described and a series of desired 3-alkenyl-oxindoles were obtained in good yields (up to 80%) and E/Z selectivities (up to 6.4/1).

    8. Catalyst-Free Reaction in Water: Synthesis of Functionalized Tetrahydroindole Derivatives via Three-Component Domino Reaction

      Xian Feng, Jianjun Wang, Wei Lin, Juanjuan Zhang, Zhibin Huang and Daqing Shi

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400312

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      An environmentally benign and efficient method has been developed for the synthesis of functionalized tetrahydroindole derivatives in aqueous media under catalyst-free conditions, by simply combining a phenylglyoxal monohydrate, an enaminone, and a barbituric acid. The advantages of this method are that it is catalyst free, has an easy workup, provides good yields, and uses water as solvent, which make this procedure facile and practical.

    9. Water-Promoted Ring-Opening Reactions of N-Substituted Saccharins and Phthalimides by Amines

      Lisha Bai, Xuan Zhang and Ning Ma

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400253

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      Reactions of N-substituted saccharins and phthalimides with amines could be promoted by water. Various o-sulfamoyl benzamides and N,N′-disubstituted phthalamides were prepared in moderate to good yields. These reactions have prominent advantages, such as short reaction time, less by-products and simple isolation of the products.

    10. Copper(II)-Catalyzed Synthesis of N-Substituted-3-amino-4-cyano-isoquinoline-1(2H)-ones by the Reaction of N-Substituted-2-iodobenzamides with Malononitrile

      Yeye Liu, Runsheng Zeng, Jie Pan and Jianping Zou

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400237

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      A novel Cu(OAc)2·H2O catalyzed coupling reaction of 2-iodobenzamides with malononitrile to afford 2-substituted-3-amino-4-cyano-isoquinoline-1(2H)-ones is described. The reaction proceeded in DMSO at 90°C for 5 h in nitrogen without external ligands.

  2. Communications

    1. Copper-Catalyzed Three-Component Azidotrifluoromethylation/Difunctionalization of Alkenes

      Mingbo Yang, Wenlu Wang, Yin Liu, Lijie Feng and Xuexia Ju

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400167

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      The intermolecular azidotrifluoromethylation of alkenes under copper catalysis is presented here. The reaction proceeded smoothly under gentle temperature, which gave the bifunctional olefins in high yields. Furthermore, 1,3-dipolar reactions between azide-containing products and phenylacetylene revealed great potential in molecular modification by using this method.

    2. Imine-Linked Covalent Organic Framework on Surface for Biosensor

      Peiyuan Wang, Mengmeng Kang, Shumin Sun, Qiang Liu, Zhihong Zhang and Shaoming Fang

      Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400260

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      Imine-linked covalent organic frameworks on amino functionalized silicon substrate were constructed via the reaction between 1,3,5-benzenetricarboxaldehyde and 1,4-diaminobenzene and used as biosensor for BSA adsorption and probe DNA immobilization.

  3. Full Papers

    1. Enhanced Salt Tolerance of Polyurethane Based Multilayer Films

      Xiaoxia Hu, Jie Xu, Shimei Xu, Jide Wang and Shun Feng

      Article first published online: 3 JUL 2014 | DOI: 10.1002/cjoc.201400303

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      Polyurethane based multilayer films fabricated by Layer-by-Layer technique showed improved salt tolerance after introducing strong polyelectrolyte poly(styrene sulfonic acid) sodium (PSS), which exhibits potential usage in controlled drug delivery, especially in the tissues or organs with high salt concentration (like kidney) for sustained drug release.

    2. Ordered Ultrathin Films of Perylene Anions and Layered Double Hydroxide Using Exfoliation-coassembly Method

      Yingkui Zhang, Ming Song, Rongping Yun, Qingyun Meng and Dongpeng Yan

      Article first published online: 3 JUL 2014 | DOI: 10.1002/cjoc.201400284

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      Perylene 3,4,9,10-tetracarboxylate (PTCB) and polymer anions (such as poly 4-styrene sulfonate (PSS) and poly vinyl sulfonate (PVS)) were co-assembled with layered double hydroxides (LDHs) nanosheets to obtain orderly ultrathin films, which show polarized luminescence.

  4. Communications

    1. Modulating the Helicity of Sugar-Substituted Perylene Diimide Self-assemblies by Solvent Polarilities

      Qiang Guo, Junchao Wang, Lingyun Zhu and Zhixiang Wei

      Article first published online: 13 JUN 2014 | DOI: 10.1002/cjoc.201400218

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      The energy difference of systems in which molecules are coaxially arranged is small, leading to the phenomenon of the helical morphology of sugar-substituted perylene diimide being easily affected by the polarity of the solutions.

  5. Full Papers

    1. Carboxylatopillarene-Modified Reduced Graphene Oxides with High Water Dispersibility for Fluorescent Dye Sensing

      Ting Zhou, Hao Yu, Mingqiang Liu and Ying-Wei Yang

      Article first published online: 5 JUN 2014 | DOI: 10.1002/cjoc.201400238

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      Carboxylated pillar[5]arene (CP5) macrocycles were modified onto the surface of reduced graphene oxide (RGO) via covalent bonds to form new pillarene-functionalized RGO nanosheets, i.e., RGO-CP5, showing great potentials in the sensing and detection of analytes in aqueous solutions.

  6. Communications

    1. A BINOL Based Fluorescence Sensor for Distinction of D-Glucose

      Bangyu Xu, Jiting Hou, Kun Li, Zhengwei Lu and Xiaoqi Yu

      Article first published online: 5 JUN 2014 | DOI: 10.1002/cjoc.201400120

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      A BINOL-based fluorescent probe for glucose was presented, which could distinct D-glucose from other monosaccharides.

  7. Notes

    1. Self-Assembly of Chiral Nano-bowl from Chiral Pd-complex Building Corners and 4,7-Phenanthroline Linkers

      Lina Yu, Xuanfeng Jiang and Shuyan Yu

      Article first published online: 4 APR 2014 | DOI: 10.1002/cjoc.201400085

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      A chiral [M3L3]6+-type metallo-nanobowl was constructed from cis-protected mono-palladium complexes as chiral corners and 4,7-phenanthroline ligand (L) as linkers by metal-directed self-assembly in aqueous media.

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