Solvent Water Content as a Factor in the Design of Metal Ion Extraction Systems Employing Ionic Liquids was written by Hawkins, Cory A.;Rigney, Madison L.;Rud, Anna;Dietz, Mark L.. And the article was included in Solvent Extraction and Ion Exchange in 2018.SDS of cas: 21252-69-7 This article mentions the following:
In the extraction of strontium nitrate from aqueous nitric acid solutions into a series of hydrophobic N-(1-hydroxyalkyl)-N’-alkylimidazolium bis[(trifluoromethyl)sulfonyl]imides by dicyclohexano-18-crown-6, a correlation has been demonstrated between the conditional extraction constant of strontium (K’ex,Sr) and the concentration of water in the equilibrated ionic liquid (IL) phase. Despite the absence of a hydroxyl group on the IL cation, essentially the same relationship is observed for the analogous N,N’-dialkylimidazolium ILs. In both instances, the correlation is attributed to the coextn. of the hydrated nitrate ion and its solvation by the hydrated diluent. Transitions of water in the attenuated total reflectance-IR spectra of the ILs are consistent with the existence of multiple states of water. The extraction efficiency for a given water content is greater for the ILs examined than for conventional solvents (i.e., n-alcs.). When coupled with existing knowledge of the factors influencing cation partitioning into ILs, these results provide insight into the IL structural characteristics required to effect efficient metal ion extraction from acidic media. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7SDS of cas: 21252-69-7).
1-Octyl-1H-imidazole (cas: 21252-69-7) 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 has been usedin the lysis, wash and elution buffer for the purification of histidine tagged Sonic Hedgehog(shh-N) protein, in elution buffer in stepwise gradient for the purification of histidine tagged aldo keto reductases using nickel affinity chromatography, as a component of homogenization buffer for the purification of phagosomal compartments from dendritic cells.SDS of cas: 21252-69-7
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem