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本文利用表面活性剂分子中内在的荧光探针及外加荧光探针,研究了离子型表面活性剂分子在水溶液中的构型,烷基三苯基鱗盐及N-烷基吡啶盐对芘的单体荧光猝灭服从Stern-Volmer方程,是扩散控制的碰撞猝灭,但不同链长的猝灭剂的荧光猝灭行为呈反常状态,即链越长,猝灭速率常数越大,在十六烷基三甲基铵(CTMAB)水溶液中观察到了芘的激基缔合物荧光,同时观察到了CTMAB对芘的荧光猝灭的阻碍(阳离子猝灭剂)和促进(阴离子猝灭剂)作用,提出离子型表面活性剂在水溶液中呈绕曲状的分子构型,且是一种动态构型。
In this paper, the intrinsic fluorescence probe and external fluorescence probe in surfactant molecules were used to study the configuration of ionic surfactant molecules in aqueous solution. The effects of alkyltriphenylphosphonium salts and N-alkylpyridinium salts on pyrene The singular fluorescence quenching obeys the Stern-Volmer equation and is diffusion-controlled collision quenching. However, the fluorescence quenching behaviors of quenching agents with different chain lengths are abnormal. That is, the longer the chain, the larger the quenching rate constant, Fluorescence of an exciplex of pyrene was observed in aqueous solution of hexadecyltrimethylammonium (CTMAB). At the same time, the effect of CTMAB on the fluorescence quenching of pyrene (cationic quencher) and promotion (anion quencher) was observed , It is proposed that the ionic surfactant is in a curved molecular configuration in aqueous solution and is a dynamic configuration.