Alternating Copolymerization of Carbon Dioxide and Propylene Oxide by Single-Component Cobalt Salen Complexes with Various Axial group, Polymer (2009), doi:10.1016/j.polymer.2009.08.034-Liu Binyuan

Alternating Copolymerization of Carbon Dioxide and Propylene Oxide by Single-Component Cobalt Salen Complexes with Various Axial group, Polymer (2009), doi:10.1016/j.polymer.2009.08.034

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writer：12. Binyuan Liu*， Xin Zhao, Yanhao Gao, Hongfei Guo, Min Yang, Xianhong Wang*
keywords：CO2, PO
source：期刊
specific source：Polymer (2009), doi:10.1016/j.polymer.2009.08.034
Issue time：2009年

A series of single-component cobalt salen complexes, N,N0-bis(salicylidene)-1,2phenylenediaminocobaltX were prepared for alternating copolymerization of carbon dioxide and propylene oxide(PO) under mild condition. The axial anion X group of the SalenphCoX played important role in tailoring the catalytic activity, polymeric/ cyclic carbonate selectivity, as well as stereochemistry of carbonate unit sequence in the polymer chain. SalenphCoX with an electron-withdrawing axial X group (complex 1c) was an ideal catalyst for the copolymerization of CO2 and PO to selectively produce polycarbonate with w99% carbonate linkage and over 81% head-to-tail structure.