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近年来,在胶束体系中的能量转移问题由于人们对胶束研究的兴趣增长而受到重视。胶柬的独特组成使它能在分子水平上组织反应物进行化学反应。把胶束研究中得到的数据和在均相体系中的结果相比较就可对所进行的反应的分子细节有更多的了解。胶束,作为一种荷电粒子,还可在某些要求实现电荷分离的场合起到作用,这在光能一电能转换的太阳能利用上是极为重要的。对胶束体系能量转移的研究可对反应物和胶束间的相互作用以及胶束结构等问题提供许多有用的资料,有助于更好地了解和利用胶束。从七十年代起,Shinitzky,Almgren和Gratzel等对此进行了大量研究,取得了进展。但是对胶束形成前或形成过程中,即体系中表面活性物质浓度低于临界胶束浓度(cmc)时的能量转移现象迄今还报道较少.最近Kusumoto等曾在胶束形成前的区域(premicellar region)内对罗丹明-6G染料和一种菁染料间的能量转移进行了研究,指出:由于染料的存在,有可能在表面活性物质浓度达到cmc之前形成了一种富染料的混合胶束,因而促进了能量转移的进行。这种“预胶束”的概念,Ghosh在研究染料和表面活性物质溶液的荧光光谱时曾于1970年提出过,但未正式公布所得结果。本工作对十二烷基硫酸钠(简称SLS)溶液胶束形成过程中几种阳离子染料间的能量转移进行了研究。
In recent years, the problem of energy transfer in micellar systems has drawn great attention because of the growing interest in the study of micelles. The unique composition of the gel allows it to organize reactants at the molecular level for chemical reactions. Comparing the data obtained in the micellar studies with the results in a homogeneous system gives a better understanding of the molecular details of the reaction that is being carried out. Micelles, as charged particles, can also play a role in some situations where charge separation is required, which is of paramount importance in solar-energy conversion of light energy to electricity. Studies on the energy transfer of micellar systems provide many useful information on the interactions between reactants and micelles and the structure of micelles and help to better understand and utilize micelles. Since the seventies, Shinitzky, Almgren and Gratzel have done a great deal of research and made progress. However, the energy transfer phenomenon before or during the formation of micelles, ie, the concentration of surfactant in the system below the critical micelle concentration (cmc), has been reported to date to a lesser extent. Recently, Kusumoto et al. premicellar region, the energy transfer between rhodamine-6G dye and a cyanine dye was studied. It was pointed out that due to the presence of dye, it is possible to form a dye-rich mixed micelles before the concentration of the surface active material reaches cmc , Thus promoting the transfer of energy. This “pre-micelle” concept was proposed by Ghosh in 1970 when studying the fluorescence spectra of dye and surfactant solutions, but the results were not officially published. In this work, the energy transfer between several cationic dyes during the micellar formation of sodium lauryl sulfate (SLS) solution was studied.