Novel urea derivative-based ionic liquids with dual-functions: CO2 capture and conversion under metal- and solvent-free conditions. Issue 9 (5th February 2016)

• Record Type: Journal Article
• Authors: Liu, Mengshuai; Liang, Lin; Li, Xin; Gao, Xiangxiang; Sun, Jianmin
• Is Part Of: Green chemistry. Volume 18:Issue 9(2016)
• Page Start: 2851
• Page End: 2863
• Publication Date: 2016-02-05
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/c5gc02605a
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : Novel environmentally benign urea derivative-based ILs were successfully prepared and characterized, and displayed exceptional performances for both CO2 capture and CO2 catalytic conversion under metal-, cocatalyst- and solvent-free conditions. Abstract : Several urea derivative-based ionic liquids (UDILs) with superior thermal stability were facilely synthesized, structurally analyzed, and applied to CO2 capture and conversion under mild conditions. These UDILs reversibly capture CO2 with double molar CO2 absorption and exhibit outstanding catalytic activity for the conversion of CO2 and various epoxides to cyclic carbonates under metal- and solvent-free conditions. The effects of reaction parameters on the catalytic activity for propylene carbonate (PC) synthesis from propylene oxide (PO) and CO2 were thoroughly investigated. Because water is inevitably contained in real gases requiring treatment, the influence of water on CO2 capture and conversion was also studied. Furthermore, reaction kinetic studies were also undertaken and a cation–anion synergistic catalytic mechanism was proposed. The single-component, metal-free, dual functional, stable, and easily recyclable ionic liquids reported herein are interesting materials, displaying a good performance for both CO2 capture and conversion.