文献类型：期刊文献

英文题名：Polymerization of methyl methacrylate catalyzed by mono-/bis-salicylaldiminato nickel(II) complexes and methylaluminoxane

作者：Lu, Jihong[1];Zhang, Danfeng[1];Chen, Qian[2];Yu, Buwei[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Daqing Petrochem Res Ctr CNPC, Daqing 163714, Peoples R China

年份：2011

卷号：5

期号：1

起止页码：19

外文期刊名：FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000423446400004)】；

基金：The project was sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China, the Science and Technology Innovation Program of the China National Petroleum Corporation, and the Key Laboratory of Advanced Polymer Materials of Shanghai (Grant No. 08DZ2230500), the Science and Technology Innovation Program of China National Petroleum Corporation.

语种：英文

外文关键词：late transition metal catalyst; methyl methacrylate; polymerization; salicylaldiminato nickel complexes; methylaluminoxane; syndiotactic structure

摘要：Two types of salicylaldiminato-based nickel complexes, mono-ligated Ni(II) complexes ([O-C6H4-oC( H)= N-Ar] Ni(PPh3)(Ph) (5), [O-(3,5-Br-2) C6H2-o-C(H)= N-Ar] Ni(PPh3)(Ph) (6), [O-(3-t-Bu) C6H3-o-C(H)= N-Ar] Ni(PPh3)(Ph) (7)) and bis-ligated Ni(II) complexes ([O( 3,5-Br-2) C6H2-o-C(H)= N-Ar] 2Ni (8), [O-(3,5-Br-2) C6H2O- C(H)= N-2-C6H4(PhO)] 2Ni (9), Ar = 2,6-C6H3(i-Pr)(2)) were synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), mass spectrography (MS) and elemental analysis (EA). In the presence of methylaluminoxane (MAO) as cocatalyst, all the nickel complexes exhibited high activities for the polymerization of methyl methacrylate (MMA) and syndiotactic-rich poly(methyl methacrylate) (PMMA) was obtained. The complexes with less bulky substituents on salicylaldiminato framework possessed higher activities, while with the same salicylaldiminato, the mono-ligated nickel complexes showed higher catalytic activity than bis-ligated ones.