硫酸存在时N-溴代苯二甲酰亚胺对甘露糖的胶束催化氧化(英文)

作     者：KATRE Yokraj SINGH Minu PATIL Sangeeta SINGH Ajaya K. 

作者机构：Department of Chemistry Kalyan Post Graduate College Bhilai Nagar Department of Chemistry Vishwanath Yadav Tamaskar Post Graduate Autonomous College 

出 版 物：《物理化学学报》 (Acta Physico-Chimica Sinica)

年 卷 期：2009年第25卷第2期

页      面：319-326页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：The project was supported by the Found of Chhattisgarh Council of Science and Technology (CGCOST)  Raipur  (Chhattisgarh)  India (621/CCOST/MRP/07) 

主　　题：胶枣催化 氧化 动力学 甘露糖 

摘      要：The kinetics of micellar-catalyzed oxidation of mannose by N-bromophthalimide was studied in the presence of sulfuric acid at 313 K. The orders of reaction with respect to [mannose], [oxidant], and [H+] were found to be fractional, first, and negative fractional order, respectively. Anionic micelles of sodium dodecyl sulfate showed a partial inhibitory effect, while cationic micelles of cetyltrimethylammonium bromide increased the reaction rate with the same kinetic behavior. The reaction was catalyzed by cationic micelles, because of favorable electrostatic/thermodynamic/ hydrophobic/hydrogen bonding between reactants and cationic micelles. Their catalytic roles are best explained by Berezin′s model. A variation of [phthalimide] showed that the rate of reaction decreased with increasing [phthalimide]. It was observed that, an increase of [mercuric acetate] had no effect on reaction velocity. The influence of salts on the reaction rate was also studied. The rate constant (kW), binding constants (KS+KO), and corresponding activation parameters (Ea, △H#, △S#, and △G#) were determined. A detailed mechanism with associated reaction kinetics is presented and discussed.