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论文类型：期刊论文

发表时间：2018-09-24

发表刊物：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录刊物：PubMed、SCIE

卷号：57

期号：39

页面范围：12670-12674

ISSN号：1433-7851

关键字：carbonyl sulfide; desymmetrization; cobalt; polymers; synthetic methods

摘要：Synthesis of chiral sulfur-containing polymers was realized for the first time by the asymmetric alternating copolymerization of achiral meso-epoxides with carbonyl sulfide (COS) using catalyst systems based on enantiopure binaphthol-linked dinuclear Co-III complexes under mild reaction conditions. The resultant poly(monothiocarbonate)s have main-chain chirality and more than 99% isotacticity. Notably, the stereoregular copolymers are typical semicrystalline thermoplastics with high melting temperatures up to 232 degrees C. Additionally, these sulfur-containing polymers have good optical properties with refractive indices of up to 1.56 and Abbe's numbers of up to 43.