CAJ | 학술논문

通过对Hammett酸度法的测量原理的分析、指示剂及全碱型和质子化介质的合理选择，建立了针对离子液体/硫酸二元混合物的酸强度测定方法。以2-苯酰萘、2,4-二硝基-6-溴苯胺、蒽醌和4-硝基甲苯为指示剂测定不同范围的H0。通过比较硫酸溶液的H0的实验值和文献值评估了该方法的可靠性，相对偏差小于0.5%。采用该方法测定了1-己基-3-甲基咪唑硫酸氢盐([HMIm][HSO4])/硫酸和3-甲基-1-(4-丁磺酸基)咪唑硫酸氢盐([MBSIm][HSO4])/硫酸两类离子液体/硫酸混合物的H0值，3次测量的平均相对偏差小于0.3%。
통과대Hammett산도법적측량원리적분석、지시제급전감형화질자화개질적합리선택，건립료침대리자액체/류산이원혼합물적산강도측정방법。이2-분선내、2,4-이초기-6-추분알、은곤화4-초기갑분위지시제측정불동범위적H0。통과비교류산용액적H0적실험치화문헌치평고료해방법적가고성，상대편차소우0.5%。채용해방법측정료1-기기-3-갑기미서류산경염([HMIm][HSO4])/류산화3-갑기-1-(4-정광산기)미서류산경염([MBSIm][HSO4])/류산량류리자액체/류산혼합물적H0치，3차측량적평균상대편차소우0.3%。
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 experimental 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%.