支链烷基苯磺酸钠聚集性质的实验与理论研究

The Study of Aggregation Properties of Sodium Alkyl Benzenensulfonate

以芘为探针、二苯酮为猝灭剂,用稳态荧光法测定了合成的4种链长分别为10、12、14、16碳,苯环均在β位取代的对烷基苯磺酸钠的临界胶团浓度、胶团聚集数和微极性.研究了链长对支链烷基苯磺酸钠聚集性质的影响.分析了支链烷基苯磺酸钠疏水、亲水基团对聚集性质的影响.用量子化学从头算Hartree Fock方法取6 31G 基组计算了支链烷基苯磺酸根离子气相中的电荷分布.

Critical micelle concentration (CMC), aggregation numbers and micropolarity of four sodium branched-alkyl benzene sulfonates were determined by steady-state fluorescence probe method in which pyrene was used as fluorescence probe and benzophenone was used as quencher. The comparison was performed between the CMC results obtained by steady-state fluorescence probe method and that obtained by surface tension method. The Mulliken charge distributions were computed at HF level with 6-31G~* basis set.