徐铁齐

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

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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.