Copolymerization of CO2 and cyclohexene oxide using a lysine-based (salen)CrIIICl catalyst

被引：37

作者：

Guo, Liping ^{[1
]}

Wang, Congmin ^{[1
]}

Zhao, Wenjia ^{[1
]}

Li, Haoran ^{[1
]}

Sun, Weilin ^{[2
]}

Shen, Zhiquan ^{[2
]}

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

DALTON TRANSACTIONS | 2009年 / 27期

关键词：

CARBON-DIOXIDE; ALTERNATING COPOLYMERIZATION; PROPYLENE-OXIDE; CO2/EPOXIDE COPOLYMERIZATION; COPPER(II) COMPLEXES; CYCLIC CARBONATE; SALEN COMPLEXES; EPOXIDES; POLYCARBONATES; COCATALYST;

D O I：

10.1039/b821184a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new, natural lysine-based (salen)(CrCl)-Cl-III ((lys-salen)(CrCl)-Cl-III) complex was prepared and its catalytic activity for the copolymerization of CO2 and cyclohexene oxide (CHO) was described in the presence of PPNCl (PPN+ = bis(triphenylphosphoranylidene) ammonium) as cocatalyst. The influence of the reaction time, operating temperature and the molar ratio of the catalyst components on the copolymerization was investigated in detail. The results showed that the (lys-salen) (CrCl)-Cl-III, synthesized from non-ortho-diamine, could effectively catalyze the alternating copolymerization (carbonate linkages = 94.6-99.0%). The selectivity was >95%, and was less sensitive to the temperature and the molar ratio of catalyst components, compared to that of the copolymerization catalyzed by traditional salen-metal complexes. The ESI-MS analyses of oligomer and (lys-salen) (CrCl)-Cl-III indicated that a possible chain-transfer reaction had taken place, which might be induced by the water coordinating to the central metal ion.

引用

页码：5406 / 5410

页数：5

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