Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia.
Electrophoresis. 2020 Oct;41(18-19):1592-1599. doi: 10.1002/elps.202000085. Epub 2020 Aug 16.
The structure and conductivity of AOT (sodium bis(2-ethylhexyl) sulfosuccinate) solutions (2.5 × 10 -2.5 × 10 M) in n-hexadecane-chloroform mixture at the chloroform concentration from 50 to 100 vol% were studied. The diffusion ordered spectroscopy NMR study revealed that in the indicated range, the observed hydrodynamic diameter of micelles depends only on the AOT concentration and does not depend on the chloroform content. Molar fractions of free AOT molecules and those aggregated into micelles were calculated using the Lindman's law: at concentrations above 2.5 × 10 М, the solutions contain mostly the micelles, whereas at concentrations below 2.5 × 10 M, the solutions contain AOT molecules. The transition region contains both the AOT molecules and the micelles. Conductivity measurements were used to determine free charge carriers in the bulk of solutions and their contributions to conductivity.
研究了在氯仿浓度为 50%至 100%体积比的正十六烷-氯仿混合物中，AOT（琥珀酸二（2-乙基己基）酯磺酸钠）溶液（2.5×10 -2.5×10 M）的结构和电导率。扩散有序光谱 NMR 研究表明，在所研究的范围内，观察到的胶束水动力直径仅取决于 AOT 浓度，而与氯仿含量无关。使用林德曼定律计算了游离 AOT 分子和聚集形成胶束的摩尔分数：在浓度高于 2.5×10 М时，溶液主要含有胶束，而在浓度低于 2.5×10 M 时，溶液含有 AOT 分子。过渡区同时含有 AOT 分子和胶束。电导率测量用于确定溶液本体中的自由载流子及其对电导率的贡献。
