Synthesis and characterization of switchable ionic compound based on DBU,CH3OH,and CO2 |
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| Authors: | Yuan Xie Richard Parnas Bin Liang Yingying Liu Chuandong Tao Houfang Lu |
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| Affiliation: | 1.College of Chemical Engineering, Sichuan University, Chengdu 610065, China;2.Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, China;3.Institute of Materials Science, Univ. of Connecticut, Storrs CT 06269-3136, USA |
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| Abstract: | Switchable ionic compounds have wide applications in chemical processes. A switchable ionic compound based on 1,8-diazabicyclo-5.4.0]-undec-7-ene (DBU), CH3OH and CO2 was synthesized and characterized. DBU/ CH3OH/CO2 ionic compound was prepared in the presence of excess methanol, and then the excess methanol was removed by reduced pressure distillation in CO2 atmosphere. The product yield (100%) reached the theoretical maximumfor the first time. Its structurewas identified by NMR, FT-IR, and XRD. The crystal product shows 8 strong peaks in XRD at 2θ values of 16.0547°, 16.4308°, 16.7651°, 18.8714°, 19.2140°, 21.9471°, 22.0780°, and 25.5661°. Its decomposition onset temperature (53 ℃) was affirmed by TGA, which is lower than its melting point. And its ionic switch point was measured by conductivity. |
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| Keywords: | DBU Switchable ionic compounds Synthesis |
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