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
Lu Xiaobing
中科院分区:
化学1区
文献类型:
--
作者:
Xu Tieqi;Yang Guanwen;Liu Chuang;Lu Xiaobing

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外消旋丙交酯的高度同选择性开环聚合(ROP)被认为是合成立体络合物聚丙交酯的一种有价值的策略。在本论文中,我们报道了新型钇双(酚盐)醚配合物,用于催化外消旋丙交酯的ROP,具有高活性(TOF)和优异的全同立构选择性(Pi)(Pi = 0.90,TOF = 120 h–1 at -15 °C;Pi = 0.84,TOF = 2280 h–1 at 25 °C)。动力学和计算研究提供了对钇催化剂介导的聚合反应的立体控制机制的基本理解。
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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