Synthesis and characterization of switchable ionic compound based on DBU, CH3OH, and CO2

doi:10.1016/j.cjche.2015.08.005

›› 2015, Vol. 23 ›› Issue (10): 1728-1732.DOI: 10.1016/j.cjche.2015.08.005

• Materials and Product Engineering • Previous Articles Next Articles

Synthesis and characterization of switchable ionic compound based on DBU, CH₃OH, and CO₂

Yuan Xie^1,2, Richard Parnas^1,3, Bin Liang^1,2, Yingying Liu², Chuandong Tao^1,2, Houfang Lu^1,2

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

Received:2015-02-10 Revised:2015-07-25 Online:2015-11-27 Published:2015-10-28
Supported by:
Supported by the Doctoral Fund of Ministry of Education of China (20130181130006), the Key Program of National Natural Science Foundation of China (21336008), and the National Natural Science Foundation of China (21476150).

Synthesis and characterization of switchable ionic compound based on DBU, CH₃OH, and CO₂

Yuan Xie^1,2, Richard Parnas^1,3, Bin Liang^1,2, Yingying Liu², Chuandong Tao^1,2, Houfang Lu^1,2

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

通讯作者: Houfang Lu
基金资助:
Supported by the Doctoral Fund of Ministry of Education of China (20130181130006), the Key Program of National Natural Science Foundation of China (21336008), and the National Natural Science Foundation of China (21476150).

Abstract

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.

Key words: DBU, Switchable ionic compounds, Synthesis

摘要： 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.

关键词: DBU, Switchable ionic compounds, Synthesis

Yuan Xie, Richard Parnas, Bin Liang, Yingying Liu, Chuandong Tao, Houfang Lu. Synthesis and characterization of switchable ionic compound based on DBU, CH₃OH, and CO₂[J]. , 2015, 23(10): 1728-1732.

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Synthesis and characterization of switchable ionic compound based on DBU, CH₃OH, and CO₂

Synthesis and characterization of switchable ionic compound based on DBU, CH₃OH, and CO₂

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