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Indexed by:期刊论文

Date of Publication:2016-09-14

Journal:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Included Journals:SCIE、EI、PubMed、Scopus

Volume:138

Issue:36

Page Number:11493-11496

ISSN No.:0002-7863

Abstract:Synthesis of stereoregular polyesters with main-chain chirality was achieved for the first time by the asymmetric copolymerization of meso-epoxides and cyclic anhydrides using catalyst systems based on enantiopure bimetallic, complexes. The combination of the biphenol-linked dinuclear aluminum complex with tert-butyl groups-in the phenolate ortho-positions and a nucleophilic co-catalyst was found to be more efficient in catalyzing this asymmetric copolymerization, affording enantiomerically enriched polyesters (up to 91% ee) with completely alternating structure and narrow molecular weight distribution. It was discovered that the isotactic-enriched poly(cyclopentene phthalate) is a typical semicrystalline material with a melting endothermic peak at 221 degrees C. This study is expected to provide a promising route to prepare various stereoregular polyesters having a wide variety of physical properties and degradability.