Gas solubility in long-chain imidazolium-based ionic liquids was written by Dai, Chengna;Lei, Zhigang;Chen, Biaohua. And the article was included in AIChE Journal in 2017.Electric Literature of C18H31F6N3O4S2 This article mentions the following:
The gas solubility in 1-dodecyl-3-methylimidazolium [C12MIM] based ionic liquids (ILs) was measured at temperatures (333.2, 353.2, and 373.2) K and pressures up to 60 bar for the first time. The popular UNIFAC-Lei model was successfully extended to long-chain imidazolium-based IL and gas (CO2, CO, and H2) systems. The free volume theory was used to explain the gas solubility and selectivity in imidazolium-based ILs by calculating the fractional free volume and free volume by the COSMO-RS model. Furthermore, the excess enthalpy of gas-IL system was concerned to provide new insights into temperature dependency of gas (CO2, CO, and H2) solubility in ILs. The exptl. data, calculation, and theor. anal. presented in this work are important in gas separations with ILs or supported ionic liquid membranes. © 2017 American Institute of Chem. Engineers AIChE J, 2017. In the experiment, the researchers used many compounds, for example, 3-Dodecyl-1-methyl-1H-imidazol-3-ium bis((trifluoromethyl)sulfonyl)amide (cas: 404001-48-5Electric Literature of C18H31F6N3O4S2).
3-Dodecyl-1-methyl-1H-imidazol-3-ium bis((trifluoromethyl)sulfonyl)amide (cas: 404001-48-5) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Electric Literature of C18H31F6N3O4S2
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem