文化大學機構典藏 CCUR:Item 987654321/48809
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/48809


    题名: Highly active bimetallic nickel catalysts for alternating copolymerization of carbon dioxide with epoxides
    作者: Su, YC (Su, Yu-Chia)
    Tsui, CH (Tsui, Chih-Hsiang)
    Tsai, CY (Tsai, Chen-Yen)
    Ko, BT (Ko, Bao-Tsan)
    贡献者: 化學系
    关键词: RING-OPENING POLYMERIZATION
    CYCLOHEXENE OXIDE
    MECHANISTIC INSIGHTS
    TRIBLOCK COPOLYMERS
    ZINC-COMPLEXES
    MESO-EPOXIDES
    ONE-POT
    CO2
    COBALT
    CYCLOADDITION
    日期: 2020-05-14
    上传时间: 2020-11-09 10:58:52 (UTC+8)
    摘要: We reported a series of well-characterized di-nuclear nickel catalysts containing 1,3-diamine-bis(benzotriazole phenolate) derivatives for high-performance copolymerization of CO2 and epoxides. The di-nickel di-acetate complex 1 was found to be a highly active catalyst to alternatingly copolymerize CO2 with cyclohexene oxide (CHO), producing poly(cyclohexene carbonate)s (PCHCs) with a high turnover frequency (TOF) up to 7800 h(-1) under optimized conditions. Interestingly, complex 1 also appears to be the first example of nickel-catalyzed CO2-copolymerization with CHO that could proceed at 1 atm CO2 pressure. Not only has the excellent catalysis of CO2/CHO copolymerization by di-Ni 1 been enabled, but also 1 has been further applied to effectively catalyze the copolymerization of CO2 with 4-vinyl-1,2-cyclohexene oxide or cyclopentene oxide (CPO) to obtain the corresponding polycarbonates. Particularly, 1 was also reported for the first time to be highly efficient for nickel-catalyzed CO2/CPO copolymerization and enabled the formation of poly(cyclopentene carbonate)s with a TOF > 700 h(-1) and excellent carbonate linkage contents (>99%). Kinetic studies of the Ni-catalyzed CO2-copolymerization of CHO were performed and the activation energy for PCHC formation by 1 is 60.6 kJ mol(-1).
    關聯: POLYMER CHEMISTRY 卷冊: 11 期: 18 頁數: 3225-3236
    显示于类别:[化學系所] 期刊論文

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