Volume 57, Issue 39 pp. 12670-12674
Communication

Synthesis of Chiral Sulfur-Containing Polymers: Asymmetric Copolymerization of meso-Epoxides and Carbonyl Sulfide

Tian-Jun Yue

Tian-Jun Yue

State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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Prof. Dr. Wei-Min Ren

Corresponding Author

Prof. Dr. Wei-Min Ren

State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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Li Chen

Li Chen

Faculty of Machenical Engineering Materials and Energy, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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Ge-Ge Gu

Ge-Ge Gu

State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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Dr. Ye Liu

Dr. Ye Liu

State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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Prof. Dr. Xiao-Bing Lu

Corresponding Author

Prof. Dr. Xiao-Bing Lu

State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024 China

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First published: 08 August 2018
Citations: 67

Graphical Abstract

A worthy COS: Chiral sulfur-containing polymers with good thermal and optical properties were synthesized for the first time by stereoselective desymmetrization copolymerization of achiral meso-epoxides and COS. The reaction is catalyzed by an enantiopure binaphthol-linked bimetallic catalyst and provides the polymers with >99 % isotacticity.

Abstract

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 CoIII 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 °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.

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