共 47 条
Metal-promoted hydrolysis of bis(p-nitrophenyl)phosphate by trivalent manganese complexes with Schiff base ligands in Gemini micellar solution
被引:45
作者:
Jiang, Weidong
[1
,2
]
Xu, Bin
[2
]
Lin, Qi
[1
]
Li, Jianzhang
[2
]
Liu, Fuan
[2
]
Zeng, Xiancheng
[1
]
Chen, Hua
[1
]
机构:
[1] Sichuan Univ, Otganomet Homogeneous Catalyt Inst, Chengdu 610064, Peoples R China
[2] Sichuan Univ Sci & Technol, Dept Chem, Key Lab Green Chem & Technol, Sichuan Zigong 643000, Peoples R China
基金:
中国国家自然科学基金;
关键词:
BNPP hydrolysis;
kinetics;
micelles;
gemini surfactant;
crowned Schiff base complexes;
D O I:
10.1016/j.colsurfa.2007.07.018
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Two crowned Schiff base manganese(III) complexes (MnL2Cl, L = L-1, L-2) were used to catalyze the hydrolysis of bis(p-nitrophenyl)phosphate (BNPP) in Gemini surfactants [bis(hexadecyidimethylammonium)hexane bromide (abbreviation 16-6-16, 2Br(-))] solution. In comparison with the rate of BNPP spontaneous hydrolysis, a six orders of magnitude in rate enhancement was observed in (MnL2Cl)-Cl-1/16-6-16 and (MnL2Cl)-Cl-2/16-6-16 systems. Owing to the different structure, (MnL2Cl)-Cl-2 shows better activity than (MnL2Cl)-Cl-1. Especially, the effects of three different micelles, i.e., 16-6-16 micelles, CTAB (hexadecyltrimethylammonium bromide) micelles, LSS (n-lauroooylsarcosine sodium) micelles, on the hydrolysis of BNPP catalyzed by (MnL2Cl)-Cl-2 were evaluated at pH7.50. Experimental observations clearly demonstrate that Gemini 16-6-16 micelle is the best one for BNPP hydrolysis among three kinds of micellar media. (C) 2007 Elsevier B.V. All rights reserved.
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页码:103 / 109
页数:7
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