Comparative study of the retention of pyridinium and imidazolium based ionic liquids on octadecylsilica stationary phase under ion pairing mechanism with alkylsulphonate anions was written by Radulescu, Medeea;Iorgulescu, Emilia-Elena;Mihailciuc, Constantin;David, Victor. And the article was included in Revue Roumaine de Chimie in 2012.Application of 65350-59-6 This article mentions the following:
Retention data for several pyridinium and imidazolium ionic liquids in presence of alkylsulfonates (C6, C7 and C8) were used in studying the retention of these cations on the octadecylsilica surface. This study showed that ionic liquids can be adsorbed on octadecylsilica surface, due to the polar interactions with the residual silanols from surface of stationary phase and hydrophobic interactions between hydrophobic moiety of these cations and octadecyl chains from the surface of the stationary phase. An unusual chromatog. retention behavior has been observed: the functional dependencies between the logarithm of the retention factor (k) and the methanol content in the mobile phase followed a binomial pattern (U-shaped), with a min. positioned within the interval 60-75% methanol. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Application of 65350-59-6).
1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C閳ユ弻 in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Application of 65350-59-6