期刊
POLYHEDRON
卷 29, 期 12, 页码 2404-2408出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2010.05.009
关键词
Pyrazole; Zinc; Polylactide; Polymerization; Bio-compatible polymer
资金
- Ministry of Education, Science and Technology [331-2008-1-C00145]
The reaction between ZnCl(2) and N,N-bis[(3,5-dimethyl-1H-pyrazol-1-yl)methyl]-1-phenylethylamine (bdmppea) affords [bdmppea)ZnCl(2)], whose structure has been determined by X-ray crystallography. The [(bdmppea)ZnEt(2)] complex in situ prepared by the reaction between (bdmppeal and ZnEt(2) exhibited high activity toward the polymerization reaction of rac-lactide at room temperature. However, its activity decreased sharply with decreasing temperature. Stereospecificity of this catalyst characterized by heterotacticity (P(r)) was determined by homonuclear decoupled NMR spectroscopy, which value was similar to 0.58. (C) 2010 Elsevier Ltd. All rights reserved.
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