The micellar properties of two Gemini surfactants i.e., butanediyl-1,4-bis(dimethyldodecyl ammonium bromide (C 12 -4(OH) 2 -C 12 ,2Br − ) and butanediyl-1,4-bis(dimethyldohexylammonium bromide) (C 16 -4-C 16 , 2Br − ) in the presence of an imidazolium based acid functionalized magnetic ionic liquid (IL) i.e., 1-acyl-3-methylimidazolium tetrachloroferrate [AcMIm]FeCl 4 , are studied using various techniques such as surface tension, conductivity, fluorescence and FT-IR spectroscopy. The surface adsorption parameters and thermodynamic parameters are systematically determined. The critical micelle concentration (CMC) is decreased and surface tension of CMC ( γ cmc ) values are increased significantly in the presence of different wt% of the added IL, and the values are observed in the order as 0.07 > 0.05 > 0.02 > water. In this study, the Gibbs energy of adsorption (Δ G ads o ) value was found to be greater than the Gibbs energy of micellization (Δ G m o ), showing that adsorption is more favored in aqueous Gemini surfactant systems. The FT-IR spectral results further confirm the changes produced by the magnetic IL [AcMIm]FeCl 4 on aqueous solutions of C 12 -4(OH) 2 -C 12 ,2Br − and C 16 -4-C 16 ,2Br − . It is noteworthy that increasing the wt% of [AcMIm]FeCl 4 results in an increase in the spontaneity of CMC formation on Gemini surfactants and the IL has more affinity for C 16 -4-C 16 , 2Br − compared to C 12 -4(OH) 2 -C 12 ,2Br − .

中文翻译：

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酸功能化磁性离子液体与 Gemini 表面活性剂的相互作用

发现吉布斯吸附能 (Δ G ads o ) 值大于胶束化吉布斯能 (Δ G mo )，表明在水性 Gemini 表面活性剂体系中更容易吸附。FT-IR 光谱结果进一步证实了磁性IL [AcMIm]FeCl 4 对C 12 -4(OH) 2 -C 12 ,2Br - 和C 16 -4-C 16 ,2Br - 水溶液产生的变化。值得注意的是，增加 [AcMIm]FeCl 4 的 wt% 导致 Gemini 表面活性剂上 CMC 形成的自发性增加，并且与 C 12 -4 相比，IL 对 C 16 -4-C 16 , 2Br - 具有更高的亲和力(OH) 2 -C 12 ,2Br - 。FT-IR 光谱结果进一步证实了磁性IL [AcMIm]FeCl 4 对C 12 -4(OH) 2 -C 12 ,2Br - 和C 16 -4-C 16 ,2Br - 水溶液产生的变化。值得注意的是，增加 [AcMIm]FeCl 4 的 wt% 导致 Gemini 表面活性剂上 CMC 形成的自发性增加，并且与 C 12 -4 相比，IL 对 C 16 -4-C 16 , 2Br - 具有更高的亲和力(OH) 2 -C 12 ,2Br - 。FT-IR 光谱结果进一步证实了磁性IL [AcMIm]FeCl 4 对C 12 -4(OH) 2 -C 12 ,2Br - 和C 16 -4-C 16 ,2Br - 水溶液产生的变化。值得注意的是，增加 [AcMIm]FeCl 4 的 wt% 导致 Gemini 表面活性剂上 CMC 形成的自发性增加，并且与 C 12 -4 相比，IL 对 C 16 -4-C 16 , 2Br - 具有更高的亲和力(OH) 2 -C 12 ,2Br - 。