title: pH-Dependence of the Aqueous Phase Room Temperature Brønsted Acid-Catalyzed Chemoselective Oxidation of Sulfides with H₂O₂.
abstract: A pH-dependence of the Brønsted acid-catalyzed oxidation of sulfides to the corresponding sulfoxides with H₂O₂ is reported for the first time based on our systematic investigation of the catalytic performance of a series of Brønsted acids. For all of the Brønsted acids investigated, the catalytic performances do not depend on the catalyst loading (mol ratio of Brønsted acid to substrate), but rather depend on the pH value of the aqueous reaction solution. All of them can give more than 98% conversion and selectivity in their aqueous solution at pH 1.30, no matter how much the catalyst loading is and what the Brønsted acid is. This pH-dependence principle is a very novel perspective to understand the Brønsted-acid catalysis system compared with our common understanding of the subject.
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. haimshen@zjut.edu.cn.
authors.forename: Hai-Min
authors.initials: HM
authors.lastname: Shen
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. zhouwj0716@163.com.
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Zhou
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. shm190726@hotmail.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Ma
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. wuhongke@zjut.edu.cn.
authors.forename: Hong-Ke
authors.initials: HK
authors.lastname: Wu
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. yuwb@zjut.edu.cn.
authors.forename: Wu-Bin
authors.initials: WB
authors.lastname: Yu
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. aining@zjut.edu.cn.
authors.forename: Ning
authors.initials: N
authors.lastname: Ai
authors.affiliation: School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China. jihb@mail.sysu.edu.cn.
authors.forename: Hong-Bing
authors.initials: HB
authors.lastname: Ji
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. shihxin@zjut.edu.cn.
authors.forename: Hong-Xin
authors.initials: HX
authors.lastname: Shi
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. sheyb@zjut.edu.cn.
authors.forename: Yuan-Bin
authors.initials: YB
authors.lastname: She
mesh_terms: D000143:Acids / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D013440:Sulfides / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D000143:Acids; D016877:Oxidants; D013440:Sulfides; D014867:Water; D006861:Hydrogen Peroxide
keywords: Brønsted acid; oxidation; pH-dependence; sulfide; sulfoxide