Synthesis and investigation of physico-chemical properties of dicationic ionic liquids
A series of dicationic ionic liquids (ILs) including [C4(MIM)2][PF6]2, [C5(MIM)2][PF6]2, [C6(MIM)2][PF6]2 and [C4(PYR)2][PF6]2 were synthesized. Their thermal stability and melting points were analysed. It was found that dicationic ILs presented important implications in the design of homogeneous an...
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doaj-2756748e832f4f6da561b9f7417ba8a62020-11-25T04:10:00ZengThe Royal SocietyRoyal Society Open Science2054-57032018-01-0151210.1098/rsos.181230181230Synthesis and investigation of physico-chemical properties of dicationic ionic liquidsYi-Xin SunYing-Ying WangBing-Bing ShenBi-Xian ZhangXiao-Mei HuA series of dicationic ionic liquids (ILs) including [C4(MIM)2][PF6]2, [C5(MIM)2][PF6]2, [C6(MIM)2][PF6]2 and [C4(PYR)2][PF6]2 were synthesized. Their thermal stability and melting points were analysed. It was found that dicationic ILs presented important implications in the design of homogeneous and heterogeneous system with water. A homogeneous system of dicationic ILs with water could be formed at a relatively high temperature and then a heterogeneous system was formed when the solution was cooled to a low temperature. The ILs recovered by altering the temperature were obtained in high percentage yields of [C4(MIM)2][PF6]2 (97.6%), [C5(MIM)2][PF6]2 (97.3%), [C6(MIM)2][PF6]2 (98.0%) and [C4(PYR)2][PF6]2 (94.2%). On the other hand, [C4(MIM)2][PF6]2 and [C5(MIM)2][PF6]2 exhibited good solubility in acetonitrile and acetone. A homogeneous system could be achieved with imidazolium-based ILs with a relatively low amount of water and acetonitrile at room temperature. All of the properties of dicationic ILs have a strong correlation with the nature of dications, the linkage chain and the symmetry of dications. Dicationic ILs may provide a new opportunity for some specific applications in order to enable the effective separation and isolation of products.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181230dicationic ionic liquidshomogeneousheterogeneousmiscibility |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yi-Xin Sun Ying-Ying Wang Bing-Bing Shen Bi-Xian Zhang Xiao-Mei Hu |
spellingShingle |
Yi-Xin Sun Ying-Ying Wang Bing-Bing Shen Bi-Xian Zhang Xiao-Mei Hu Synthesis and investigation of physico-chemical properties of dicationic ionic liquids Royal Society Open Science dicationic ionic liquids homogeneous heterogeneous miscibility |
author_facet |
Yi-Xin Sun Ying-Ying Wang Bing-Bing Shen Bi-Xian Zhang Xiao-Mei Hu |
author_sort |
Yi-Xin Sun |
title |
Synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
title_short |
Synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
title_full |
Synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
title_fullStr |
Synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
title_full_unstemmed |
Synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
title_sort |
synthesis and investigation of physico-chemical properties of dicationic ionic liquids |
publisher |
The Royal Society |
series |
Royal Society Open Science |
issn |
2054-5703 |
publishDate |
2018-01-01 |
description |
A series of dicationic ionic liquids (ILs) including [C4(MIM)2][PF6]2, [C5(MIM)2][PF6]2, [C6(MIM)2][PF6]2 and [C4(PYR)2][PF6]2 were synthesized. Their thermal stability and melting points were analysed. It was found that dicationic ILs presented important implications in the design of homogeneous and heterogeneous system with water. A homogeneous system of dicationic ILs with water could be formed at a relatively high temperature and then a heterogeneous system was formed when the solution was cooled to a low temperature. The ILs recovered by altering the temperature were obtained in high percentage yields of [C4(MIM)2][PF6]2 (97.6%), [C5(MIM)2][PF6]2 (97.3%), [C6(MIM)2][PF6]2 (98.0%) and [C4(PYR)2][PF6]2 (94.2%). On the other hand, [C4(MIM)2][PF6]2 and [C5(MIM)2][PF6]2 exhibited good solubility in acetonitrile and acetone. A homogeneous system could be achieved with imidazolium-based ILs with a relatively low amount of water and acetonitrile at room temperature. All of the properties of dicationic ILs have a strong correlation with the nature of dications, the linkage chain and the symmetry of dications. Dicationic ILs may provide a new opportunity for some specific applications in order to enable the effective separation and isolation of products. |
topic |
dicationic ionic liquids homogeneous heterogeneous miscibility |
url |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181230 |
work_keys_str_mv |
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