Highly Robust Yttrium Bis(phenolate) Ether Catalysts for Excellent Isoselective Ring-Opening Polymerization of Racemic Lactide
Highly Robust Yttrium Bis(phenolate) Ether Catalysts for Excellent Isoselective Ring-Opening Polymerization of Racemic Lactide
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高鲁棒性双(酚)钇醚催化剂,可实现外消旋丙交酯的出色同选择性开环聚合
DOI:
10.1021/acs.macromol.6b02439
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发表时间:
2017-01
期刊:
影响因子:
5.5
通讯作者:
Lu Xiaobing
中科院分区:
文献类型:
--
作者:
Xu Tieqi;Yang Guanwen;Liu Chuang;Lu Xiaobing
The highly isoselective ring-opening polymerization (ROP) of racemic lactide is regarded as a valuable strategy for the synthesis of stereocomplex polylactide. In the present contribution, we report the novel yttrium bis(phenolate) ether complexes for catalyzing ROP of racemic lactide in high activity (TOF) and excellent isotactic selectivity (Pi) (Pi = 0.90, TOF = 120 h–1 at −15 °C; Pi = 0.84, TOF = 2280 h–1 at 25 °C). Kinetic and computational studies provide a fundamental understanding of the stereocontrol mechanism governing polymerization reactions mediated by yttrium catalysts.
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