稀土三元催化剂对二氧化碳/环氧化合物共聚反应的催化机理研究  

CATALYTIC MECHANISM OF TERNARY RARE-EARTH-MATAL COORDINATION CATALYSTS IN THE COPOLYMERIZATION OF CARBON DIOXIDE AND EPOXIDE

作　　者：闵加栋[1,2] 张亚明[1] 陈玉岩[1] 王献红[1] 赵晓江[1] 王佛松[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022 [2]中国科学院研究生院,北京100039

出　　处：《高分子学报》2009年第3期233-237,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号20634040)资助项目

摘　　要：采用X射线光电子能谱(XPS)技术研究了二氧化碳与环氧丙烷共聚反应的稀土三元催化剂,探讨了中心金属的X射线光电子能谱与催化活性间的关系,指出稀土三元催化剂的活性中心在于配位活化后的锌氧键,稀土盐通过与烷氧基锌形成双金属桥键,改变了活性中心的电子云分布,从而提高了反应活性.Ternary rare earth metal coordination catalysts prepared from Y(CCl_3COO)_3,glycerin,and ZnEt_2 were confirmed to be effective for the copolymerization of carbon dioxide and various epoxides.Whereas their precise modification was hampered by the lack of insight into active centers.Here an X-ray photoelectron spectroscopy(XPS) technique was employed to study the interaction of various components,especially the central metal atoms in these catalysts.Copolymerization experiments with typical conditions were al...

关 键 词：二氧化碳 共聚 稀土 X射线光电子能谱 机理 

分 类 号：O643.36[理学—物理化学]