A method for determination of Hammett acidity function (H0) of ionic liquid/sulfuric acid binary mixtures was written by Zhou, Fei;Zhang, Yuan;Zhang, Tao;Liang, Bin;Tang, Sheng-wei. And the article was included in Tianranqi Huagong in 2013.Recommanded Product: 478935-29-4 The following contents are mentioned in the article:
A method for determining the Hammett acidity function (H0) of ionic liquid/H2SO4 binary mixtures was established by analyzing the measuring principal and choosing the suitable media for protonating or unprotonating the indicators. 2-Benzoylnaphthalene, 6-bromo-2, 4-dinitroaniline, anthraquinone and 4-nitrotoluene were used as indicators for different scopes of H0. The reliability of this method was evaluated by comparing the exptl. H0 and the literature H0 of H2SO4 solution, and the relative deviation was less than 0.5%. The method was successfully used to determine the H0 of the ([HMIm][HSO4])/H2SO4 with a IL mass fraction of up to 19% and the ([MBSIm][HSO4])/H2SO4 with a IL mass fraction of up to 15%. The relative deviation of three parallel measurements was less than 0.3%. This study involved multiple reactions and reactants, such as 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4Recommanded Product: 478935-29-4).
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Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem