【摘要】 用光谱法研究了荧光分子 2 (对 己基胺基 )苯基 3,3 二甲基 5 乙酯基 3H 吲哚基 甲基二辛基碘化铵 (A)与TritonX 10 0胶束间的相互作用。测定了A在不同浓度的TritonX 10 0溶液中的吸收光谱 ,荧光光谱和荧光寿命。实验得到了A与胶束的结合常数Ks,A在胶束中所处环境的极性及其在胶束中发生的pH效应。结果表明 :A与胶束间存在较强的相互作用 ;A在胶束中所处环境的极性接近于甲醇的极性 ;并推测出了A的不同基团在胶束中所处的不同位置。同时发现 :在TritonX 10 0胶束中A可探测到两个位置 ,但当TritonX 10 0的浓度过大时 ,A却只能探测到一个位置。更多还原

【Abstract】 The interactions between a fluorescent molecule,[2 (p hexylamino) phenyl 3,3 dimethyl 5 ethoxycarbonyl 3H indole] methyldiioctadecylammonium iodide (A),with Triton X 100 micelle are investigated by absorption and fluorescence spectra.The relatively large binding constant K s shows that strong interactions between A and micelles do exist.The polarity parameter confirms that the polarity of the environment of A in the micelle is similar to that of methanol.According to the spectral characteristics and pH effects,the various sites of different groups of A in micelles are suggested.Lifetime measurements indicate that A can recognize two sites with Triton X 100 micelle at lower surfactant concentration.However,in the Triton X 100 micelle at higher surfactant concentration,A can only recognize one site.更多还原