荧光探针法测定甜菜碱cmc的研究

Studies on the Critical Micelle Concentration of N-Alkylbetaines by Fluorescence Probe

荧光探针法测定甜菜碱ｃｍｃ的研究任学贞，李干佐，王弘立，翟立民，隋卫平，徐欣艳（山东大学化学系，济南，２５０１００）关键词甜菜碱，芘，临界胶束浓度Ｅｋｗａｌｌ等［１］发现，表面活性剂的溶液能够增溶多环芳烃并发射较强的荧光．在常用的测定表面活性剂临界胶...

The fluorescence characteristics of I5/I1 and I3/I1 of pyrene which is sensitive to the environment of probe was used to study the critical micelle concentration(cmc)of N-dodecylbetaine and N-tetradecylbetaine.The effect of salt concentration on the cmc values was studied.The results obtained indicate that cmc values determined from the parametersI5/I1 of pyrene are close to that from the surface tension measurements,and more accurate than that from I3/I1.