Jin-Quan Wang

Publications (10) View all

• Source

  Available from: X.P. Zhang

  Article: Experimental and theoretical studies on hydrogen bond-promoted fixation of carbon dioxide and epoxides in cyclic carbonates.

  Jin-Quan Wang, Jian Sun, Wei-Guo Cheng, Kun Dong, Xiang-Ping Zhang, Suo-Jiang Zhang
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  ABSTRACT: The hydrogen bond donor-promoted fixation of CO(2) and epoxides into cyclic carbonates was investigated through experimental and density functional theory studies. A highly effective homogeneous system of 1,2-benzenediol-tetrabutyl ammonium bromide (TBAB) and heterogeneous poly-ionic liquids were developed for the fixation of CO(2) into cyclic carbonates via hydrogen bond activation, based on the understanding of the reaction mechanism and catalyst design. The work hence provides a molecular level understanding of the reaction process and forms the basis for the rational design of catalytic systems for the fixation of CO(2) into useful organic compounds.
  Physical Chemistry Chemical Physics 06/2012; 14(31):11021-6. · 3.57 Impact Factor
• Article: Synthesis of dimethyl carbonate catalyzed by carboxylic functionalized imidazolium salt via transesterification reaction

  Jin-Quan Wang, Jian Sun, Wei-Guo Cheng, Chun-Yan Shi, Kun Dong, Xiang-Ping Zhang, Suo-Jiang Zhang
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  ABSTRACT: We investigated the dependence of cations and anions of ionic liquids (ILs) on catalytic activity for the synthesis of dimethyl carbonate (DMC) via the transesterification of ethylene carbonate (EC) with methanol (CH3OH), and demonstrated that an easily prepared carboxylic functionalized imidazolium salt exhibited higher activity, 82% yield of DMC together with 99% selectivity was obtained under the metal-free and halogen-free conditions. The reaction mechanism was also proposed according to experimental and DFT studies. In addition, in order to simplify the catalyst separation and evaluate the catalyst stability, we also covalently anchored the functionalized imidazolium salt onto a highly cross-linked polystyrene resin (PS) as a heterogeneous catalyst for DMC synthesis, and continuously performed the reaction in a fixed bed reactor for 200 h without obvious loss of activity, which would have potential applications in industry. The process thus represented an environmentally friendly pathway for the synthesis of DMC via a transesterification reaction.
  Catalysis Science & Technology 01/2012; 2(3):600-605.
• Source

  Available from: Jin-Quan Wang

  Article: Insights into quaternary ammonium salts-catalyzed fixation carbon dioxide with epoxidesw

  Jin-Quan Wang, Kun Dong, Wei-Guo Cheng, Jian Sun, Suo-Jiang Zhang
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  ABSTRACT: Chemical fixation of CO 2 into useful organic compounds has attracted much attention in both academia and industry from the standpoint of environmental protection and resource utilization. In this respect, the fixation of CO 2 with epoxides catalyzed by quaternary onium salts has been successfully achieved and commercialized, however, the details of the mechanism are still unclear. In this work, we investigated the mechanism of fixation of CO 2 with ethylene oxide catalyzed by quaternary ammonium salts by experimental and density functional theory (DFT) studies. Through the study, the detailed structural and energetic information about each step of the catalytic cycle were obtained. In addition, several factors, such as the chain length and anion, affected the reaction mechanisms, and the outcomes were also identified by experimental and DFT studies. This work provides a molecular level understanding of the reaction process and forms the basis of rational design of catalytic system.
  Catalysis Science & Technology 01/2012; 2:1480-1484.
• Article: Polyethylene Glycol–Enhanced Chemoselective Synthesis of Organic Carbamates from Amines, CO2, and Alkyl Halides

  De-Lin Kong, Liang-Nian He, Jin-Quan Wang
  Synthetic Communications 11/2011; 41(22):3298-3307. · 1.06 Impact Factor
• Article: Synthesis of bimagnetic ionic liquid and application for selective aerobic oxidation of aromatic alcohols under mild conditions.

  Cheng-Xia Miao, Jin-Quan Wang, Bing Yu, Wei-Guo Cheng, Jian Sun, Sébastien Chanfreau, Liang-Nian He, Suo-Jiang Zhang
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  ABSTRACT: The first bimagnetic ionic liquid based on Fe and TEMPO with cooperative functionalities not only exhibited strong paramagnetic behaviour at room temperature under an applied magnetic field of 5000 Oe but also proved to be an effective catalyst for selective aerobic oxidation of aromatic alcohols under mild and clean conditions.
  Chemical Communications 03/2011; 47(9):2697-9. · 6.17 Impact Factor