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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:吉林大学
学位:博士
所在单位:化学学院
学科:有机化学. 高分子化学与物理
办公地点:大连理工大学化学楼501
联系方式:Email:tqxu@dlut.edu.cn Phone:(0411)84708904
电子邮箱:tqxu@dlut.edu.cn
From Stereochemically Tunable Homopolymers to Stereomultiblock Copolymers: Lewis Base Regulates Stereochemistry in the Coordination Polymerization of 2-Vinylpyridine
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论文类型:期刊论文
发表时间:2018-03-27
发表刊物:MACROMOLECULES
收录刊物:SCIE、EI
卷号:51
期号:6
页面范围:2240-2246
ISSN号:0024-9297
摘要:Excellent isoselectivity (mmmm > 99%) and high activity (TOF > 4000 h(-1) were achieved for the first time in the polymerization of the polar 2-vinylpyridine by using the simple lutetium-based catalysts, Lu(CH2SiMe3)(3)(THF)(x)(Py)(2-x) (x = 0, 1, 2). The isoselectivity (mm) of the polymer could be varied between 37% and 99% through simply altering the quantity of Lewis base (tetrahydrofuran, 1,4-diazabicyclo [2.2.2] octane, 3-bromopyridine, and pyridine) added. Moreover, a novel method for preparing isotactic-atactic stereomultiblock poly(2-vinylpyridine)s was developed by the addition and removal of THE during polymerization. The polymerization process including stereoselective control mechanism was deduced by DFT calculations.