芳香反离子与离子表面活性剂胶团的相互作用

用紫外吸收光谱的方法研究了多种芳香反离子与离子表面活性剂胶团之间的相互作用。发现阳离子表面活性剂和阴离子表面活性剂胶团对芳香反离子的吸收光谱有着显著不同的影响，芳香反离子结构的细微变化可导致光谱特性显著不同。这被解释为阳离子表面活性剂胶团与芳香环之间的阳离子-π相互作用。阳离子-π相互作用需要阳离子表面活性剂分子与芳香反离子具有合适的相对位置与距离。通过测定各混合体系的吸附量证明，不同的芳香反离子在胶团表面有不同的排列方式。NMR的实验结果支持了上述解释。

The interaction between the aromatic organic counterion and ionic surfactant micelle

The UV absorbance of various aromatic organic counterions has been investigated in the presence of ionic surfactant micelle. Addition of the cationic surfactant micelle to aqueous solutions of the aromatic organic salts induces a red shift of the adsorption spectra. It is proposed that the red shift is caused by cation-π interaction, which requires proper situation and distance between the surfactant's headgroup and the aromatic organic counterion. By measuring the adsorption of the surfactant and the aromatic organic counterions, it is discovered that different aromatic organic counterions adopt different configurations. This explanation is consistent with the NMR results.