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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Novel fluorescent probe as aggregation predictor and micro-polarity reporter for micelles and mixed micelles
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Novel fluorescent probe as aggregation predictor and micro-polarity reporter for micelles and mixed micelles

机译：新型荧光探针作为胶束和混合胶束的聚集预测剂和微极性报告剂

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摘要

Aggregational behaviour of micelles sodium dodecyl sulphate (SDS and Triton X-100, TX-100 both in pure and mixed form) and micelle like aggregates such as polymer-surfactant system [polymer poly(vinyl pyrrolidone), PVP]-SDS have been studied by using fluorescence characteristics of a newly synthesized probe. The critical micelle concentration (CMC) values determined at various surfactant compositions are lower than the ideal values indicating a synergistic effect. The value of the interaction parameter for the surfactant mixture has been determined which agrees well with the value calculated according to molecular thermodynamic theory. The total aggregation number of surfactant in mixed micelle shows a drastic variation in the SDS mole fraction range 0 <= alpha(1) <= 0.3 and beyond the range it remains practically constant. Molar-based partition coefficients for the dye between the micellar and aqueous phase have been determined and a non-linear variation is obtained for the mixed micellar system. Variations of micro-polarity in the mixed micellar region have been investigated as a function of surfactant composition and results have been explained in terms of a suitable realistic model. (c) 2004 Elsevier B.V. All rights reserved.
机译：研究了胶束十二烷基硫酸钠（SDS和Triton X-100，TX-100均为纯和混合形式）和胶束状聚集体（如聚合物-表面活性剂系统[聚合物聚（乙烯基吡咯烷酮），PVP] -SDS）的聚集行为。通过使用新合成探针的荧光特性。在各种表面活性剂组合物中测定的临界胶束浓度（CMC）值低于理想值，表明具有协同作用。已经确定了表面活性剂混合物的相互作用参数的值，其与根据分子热力学理论计算的值非常吻合。混合胶束中表面活性剂的总聚集数显示SDS摩尔分数范围0 <= alpha（1）<= 0.3时发生剧烈变化，超出该范围则几乎保持恒定。已经确定了染料在胶束和水相之间的基于摩尔的分配系数，并且对于混合胶束系统获得了非线性变化。已经研究了混合胶束区域中微极性的变化与表面活性剂组成的函数关系，并根据合适的实际模型对结果进行了解释。 （c）2004 Elsevier B.V.保留所有权利。

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