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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 aromatic counterions and ionic surfactant micelles was studied by UV absorption spectroscopy. It was found that the absorption spectra of aromatic counterions and cationic surfactants were significantly different from those of anionic counterions , The subtle changes in the aromatic counterion structure can lead to significantly different spectral properties, which is interpreted as the cation-π interaction between the cationic surfactant micelle and the aromatic ring.Cation-π interaction requires the interaction of cationic surfactant molecules with aromatic The counterions have the proper relative position and distance.The different aromatic counter ions have different arrangement on the micelle surface by measuring the adsorption amount of each mixed system.The experimental results of NMR support the above explanation.