Fluorescence probe studies of the effect of concentration on the state of aggregation of surfactants in aqueous solution

摘要: Abstract The aggregation numbers n of the micelles formed by five cationic, one anionic, two zwitterionic, and nonionic surfactants in aqueous solutions were determined at various concentrations means a method based on analysis fluorescence decay curves micelle-solubilized pyrene (S. Atik, M. Nam, L. Singer, Chem. Phys. Lett. 67 , 75 (1979)) . micelle number anionic surfactant has also been measured H 2 O-0.1 M NaCl. For six ionic water, was found to be independent concentration range extending from CMC 0.2-0.3 values are close those which can calculated basis oil drop model for micelles. zwitterionic value very strongly dependent distance between charged groups head. When these far apart is that an comparable chain length. On contrary when contact behaves as forms large increase with concentration. lifetime ratio intensities first third vibronic peaks measured. They confirm solubilized palisade layer yield additional information structure.