Correlation of molecular structure and polarity of ionic liquids was written by Spange, Stefan;Lungwitz, Ralf;Schade, Alexander. And the article was included in Journal of Molecular Liquids in 2014.SDS of cas: 35487-17-3 This article mentions the following:
The empirical Kamlet-Taft solvent parameters for hydrogen bond donating (HBD) ability (α), hydrogen bond accepting (HBA) ability (β), and dipolarity/polarizability (π*) have been determined for 102 ionic liquids (ILs). α, β, and π* have been measured by means of the solvatochromic methods utilizing three specific dyes Fe(phen)2(CN)2 (Fe), 3-(4-amino-3-methyl-phenyl)-7-phenyl-benzo-[1,2-b:4,5-b’]-difuran-2,6-dione (ABF) and 4-tert-butyl-2-(dicyanomethylene)-5-[4-(diethylamino)benzylidene]-Δ3-thiazoline (Th) each solely sensitive to one of the Kamlet-Taft parameter. Different types of ILs with various cation structure such as 1,3-dialkyl imidazolium and 2- and 4-,5-Me substituted derivatives, pyridinium, tetraalkylammonium, trialkylsulfonium and tetraalkylphosphonium were used. In conjunction to the [C4mim] cation, more than 20 various established anions, such as halides, tetrafluoroborate, dicyanamide, were considered in this study. The frontiers of HBA ability strength of the anions are marked by the specific anions azide (N3–) (large β) and FAP PF3(C2F5)3– (lowest β). The linear intercorrelation between α and β is clearly evidenced, which shows that anion and cation interact with each other, for each type of IL used. Also correlation of mol. structure of the cation and the HBD ability can be recognized and supported by results from NMR spectroscopy. The interpretation of π* is still not satisfied because dipolarity and polarizability of each IL obviously contribute in different proportions to the value. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3SDS of cas: 35487-17-3).
1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. 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: 35487-17-3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem