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Heterogeneous catalytic conversion of CO2 and epoxides to cyclic carbonates over multifunctional tri-s-triazine terminal-linked ionic liquids

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Title: Heterogeneous catalytic conversion of CO2 and epoxides to cyclic carbonates over multifunctional tri-s-triazine terminal-linked ionic liquids
Authors: Liu, Mengshuai Browse this author
Lan, Jianwen Browse this author
Liang, Lin Browse this author
Sun, Jianmin Browse this author
Arai, Masahiko Browse this author →KAKEN DB
Keywords: Tri-s-triazine
Ionic liquid
Carbon dioxide
Cyclic carbonate
Issue Date: Mar-2017
Publisher: Elsevier
Journal Title: Journal of catalysis
Volume: 347
Start Page: 138
End Page: 147
Publisher DOI: 10.1016/j.jcat.2016.11.038
Abstract: Novel metal-free tri-s-triazine terminal-linked ionic liquids have been developed from various precursors of urea-derivative-based ionic liquid/urea by a co-condensation method. These were successfully used for the chemical fixation of CO2 to epoxides producing cyclic carbonates under mild and green conditions in which no co-catalyst and solvent were needed. The tri-s-triazine terminal-linked ionic liquids so prepared possess multiple functionalities of hydrogen bond donor ability, nucleophilicity, and Lewis base property, which are vital to the ring-opening of epoxide and the activation of CO2. Reaction parameters (temperature, CO2 pressure, catalyst loading, time, water content) for cycloaddition of CO2 with propylene oxide (PO) to propylene carbonate (PC) over tri-s-triazine terminal-linked ionic liquids were optimized. It has been shown that, under the optimal conditions, the catalyst is also versatile to CO2 cycloaddition with other epoxides, can be reused in up to five consecutive recycles without significant loss of activity, and can still remain active in the presence of moderate amounts of water. A possible reaction mechanism has been proposed. The single-component, metal-free, multifunctional, and easily recyclable tri-s-triazine terminal-linked ionic liquids reported here can be an effective and ecofriendly catalyst for highly efficient CO2 fixation.
Rights: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒井 正彦

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