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Bimetallic Nickel Complexes that Bear Diamine‐Bis(Benzotriazole Phenolate) Derivatives as Efficient Catalysts for the Copolymerization of Carbon Dioxide with Epoxides
Author(s) -
Lin PeiMin,
Chang ChiHang,
Chuang HuiJu,
Liu ChengTang,
Ko BaoTsan,
Lin ChuChieh
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201501280
Subject(s) - cyclohexene oxide , copolymer , catalysis , benzotriazole , nickel , bimetallic strip , polymer chemistry , chemistry , diamine , epoxide , polycarbonate , organic chemistry , polymer
We report the facile synthesis and structural characterization of efficient bimetallic nickel catalysts that bear diamine‐bis(benzotriazole phenolate) derivatives for the copolymerization of CO 2 and epoxides. Thermally robust di‐nickel 2 is an effective catalyst for the alternating copolymerization of cyclohexene oxide (CHO) with CO 2 to give turnover numbers of up to >4000 and turnover frequencies of up to >400 h −1 . Ni catalyst 2 leads to not only controlled CO 2 /CHO coupling, but it has also been applied to catalyze the copolymerization of 4‐vinyl‐1,2‐cyclohexene oxide (VCHO) and CO 2 to obtain the corresponding polycarbonate with the vinyl functionality on the side chains. This is the first example of a dinuclear Ni complex that is efficient for both CO 2 /VCHO copolymerization and the formation of a high‐molecular‐weight copolymer with a large amount of carbonate linkages.