Highly active cobalt(II) and copper(II) complexes supported by aminomethylquinoline mediating stereoselective ring-opening polymerization of rac-lactide

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-17 DOI:10.1002/bkcs.12828

Jaegyeong Lee, Saira Nayab, Ameet Kumar, Dongil Kim, Hyewon Jung, Sang-Ho Lee, Daeheum Cho, Hyosun Lee

引用次数: 0

Abstract

Cobalt(II) and copper(II) complexes supported by 4-(quinolin-2-ylmethyl)morpholine (L) were characterized, and their reactivity toward the ring-opening polymerization (ROP) of rac-lactide (rac-LA) was studied. The use of [LMCl₂]/LiOⁱPr and [LMCl₂]/LiMe (M = Co, Cu) resulted in over 95% conversion within 10 min at 25 °C. The effect of the initiating group and geometry of the metal complexes steered the heterotactic enchainment of the resultant polylactide(PLA). The Co(II)/LiMe system represents the first example of the ROP of rac-LA with high heterotactic enchainment (P_r = 0.92) with 98% conversion at 0 °C.

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氨甲基喹啉支持的高活性钴（II）和铜（II）配合物介导 rac-lactide 的立体选择性开环聚合反应

对 4-(喹啉-2-基甲基)吗啉（L）支持的钴（II）和铜（II）配合物进行了表征，并研究了它们对 rac-内酰胺（rac-LA）开环聚合（ROP）的反应活性。使用 [LMCl2]/LiOiPr 和 [LMCl2]/LiMe （M = Co、Cu）可在 25 °C 下 10 分钟内实现 95% 以上的转化率。金属配合物的引发基团和几何形状影响了生成的聚乳酸（PLA）的异actic链。Co(II)/LiMe体系是rac-LA的第一个ROP实例，具有较高的异actic链结（Pr = 0.92），在0 °C时转化率为98%。

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来源期刊

Bulletin of the Korean Chemical Society Chemistry-General Chemistry

自引率

23.50%

发文量

182

期刊介绍： The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.