Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (10): 2321.

• Preface • Previous Articles     Next Articles

Selective Oxidation of Sulfides with Hydrogen Peroxide Catalyzed by Supported Ionic Liquid Brush / Peroxophosphotungstate

SHI Xian-Ying, MA Wen-Juan, HAN Xiao-Yan, ZHANG Wen, LÜ Ai-Feng, WEI Jun-Fa*   

  1. School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Normal University, Xi'an 710062, China
  • Received:2010-10-28 Revised:2010-12-27 Online:2011-10-10 Published:2011-09-11
  • Contact: WEI Jun-Fa E-mail:weijf@snnu.edu.cn
  • Supported by:

    国家自然科学基金(批准号:  20906059和21072123)和陕西省自然科学基金(批准号:  2009JQ2007)资助.

Abstract: A heterogeneous catalyst composed of peroxotungstates immobilized on bis-layered ionic liquid brush-modified silica has been synthesized and characterized by elemental analysis, IR and SEM-EDAX. The catalytic property of the system was examined for the oxidation of sulfides to sulfoxides or sulfones with 30% hydrogen peroxide at room temperature. The results showed that this recoverable catalyst exhibited both high catalytic activity and excellent selectivity. The sulfides were selectively oxidized to sulfoxides with traces of sulfones using 1.1 times of H2O2. Changing the amount of H2O2 to 2.5 times, sulfones were given as the main products. It is noteworthy that the catalyst afforded high chemoselectivity towards sulfur groups with unsaturated double bonds even though excess hydrogen peroxide was used. There was no apparent loss of catalytic efficiency through seven cycles.

Key words: Hydrogen peroxide, Heterogeneous catalysis, Supported ionic liquid, Selective oxidation, Sulfide

CLC Number: 

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