Dipartimento di Chimica Organica E. Paterno, Università degli Studi di Palermo, Viale delle Scienze-Parco d'Orleans II, 90128 Palermo, Italy.
J Org Chem. 2009 Mar 6;74(5):1952-6. doi: 10.1021/jo802473p.
In order to obtain an acidity scale in room-temperature ionic liquid solutions, the protonation equilibrium of sodium p-nitrophenolate in [bm(2)im][NTf(2)] and in [bmpyrr][NTf(2)], at 298 K, has been studied by means of spectrophotometric titration. Carboxylic acids differing in both structure and in water solution strength have been used. Data collected indicate that in the analyzed ionic liquid solutions carboxylic acids are less dissociated than in water solution. Furthermore, by virtue of a mutual interaction, the studied equilibrium seems to be affected by both the nature of the ionic liquids and the carboxylic acids.
为了在室温离子液体溶液中获得酸度标度，在 298 K 下通过分光光度滴定法研究了对硝基苯酚钠在 [bm(2)im][NTf(2)] 和 [bmpyrr][NTf(2)] 中的质子化平衡。使用了结构和水溶解度均不同的羧酸。收集的数据表明，在所分析的离子液体溶液中，羧酸的离解程度小于水溶液。此外，由于相互作用，所研究的平衡似乎受到离子液体和羧酸的性质的影响。
