FLUORESCENCE PROBE STUDIES ON THE SECOND CRITICAL MICELLE CONCENTRATION OF SEVERAL KINDS OF SURFACTANTS

摘要: ABSTRACT The fluorescence intenstiy ratios (F2/F1) of excimer (F2) to monomer (F1) probe (pyrene) were measured as a function the concentration surfactant in several systems, which consist sodium hexadecyl sulfonate (C16As)-anionic surfactant, cetyltrimethylammonium bromide (CTAB)-cationic and pentaoxyethylene decyl ether (C10E5)-nonionic surfactant. second CMC values obtained according F2/F1 ~ curve break. In addition, we also studied variation vs NaCl concentration. It was found that C16A5 CTAB decreased with increase But present had no influence on value C10E5. Results showed sphere-shaped micelles turn into rod-like micelle at CMC. results interpreted terms diffusion pyrene molecules distribution among micelles.