Alternative probe for the determination of the hydrogen-bond acidity of ionic liquids and their aqueous solutions was written by Madeira, Pedro P.;Passos, Helena;Gomes, Joana;Coutinho, Joao A. P.;Freire, Mara G.. And the article was included in Physical Chemistry Chemical Physics in 2017.Safety of 1-Butyl-3-methylpyridinium Chloride This article mentions the following:
Although highly relevant to a priori select adequate solvents for a given application, the determination of the hydrogen-bond acidity or proton donor ability of aqueous solutions of ionic liquids is a difficult task due to the poor solubility of the commonly used probes in aqueous media. In this work, we demonstrate the applicability of the pyridine N-oxide probe to determine the hydrogen-bond acidity of both neat ionic liquids and their aqueous solutions, based on 13C NMR chem. shifts, and the suitability of these values to appraise the ability of ionic liquids to form aqueous two-phase systems. In the experiment, the researchers used many compounds, for example, 1-Butyl-3-methylpyridinium Chloride (cas: 125652-55-3Safety of 1-Butyl-3-methylpyridinium Chloride).
1-Butyl-3-methylpyridinium Chloride (cas: 125652-55-3) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Safety of 1-Butyl-3-methylpyridinium Chloride