Indexed by:
Journal Papers
First Author:
Liu, Ye
Correspondence Author:
Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
Co-author:
Ren, Wei-Min,Zhang, Wei-Ping,Zhao, Rong-Rong,Lu, Xiao-Bing
Date of Publication:
2015-10-01
Journal:
NATURE COMMUNICATIONS
Included Journals:
SCIE、PubMed、Scopus
Document Type:
J
Volume:
6
Page Number:
8594
ISSN No.:
2041-1723
Abstract:
The crystalline stereocomplexed polycarbonates can be prepared by mixing enantiopure polymers with opposite configuration, which derived from the asymmetric copolymerization with CO2 using enantiopure catalyst or/and chiral epoxides. Herein, we develop a powerful strategy for producing crystalline intramolecular stereocomplexed polycarbonates from racemic catalysts, which possess similar thermal stability and crystalline behaviour in comparison with the stereocomplexes by mixing opposite enantiopure polymers. Living polymer chains shuttle between catalyst molecules with different configurations to produce diastereomeric active species which is suggested to be responsible for the formation of isotactic multiblock polycarbonates in racemic bimetallic cobalt catalyst-mediated stereoselective copolymerization of CO2 and meso-epoxides. Solid-state NMR spectroscopy study suggests that the interaction in the carbonyl and methine regions is responsible for the strong crystallization capacity and compact package structure in the crystalline polycarbonates.
Translation or Not:
no
