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

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (8): 1295.

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

REN Xue-Zhen, LI Gan-Zuo, WANG Hong-Li, ZHAI Li-Min, SUI Wei-Pin, XU Xin-Yan

Department of Chemistry, Shandong Univeristy, Jinan, 250100

Received:1994-11-09 Revised:1995-04-28 Online:1995-08-24 Published:1995-08-24

Abstract

Abstract: The fluorescence characteristics of I₅/I₁and I₃/I₁of 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 parameters I₅/I₁of pyrene are close to that from the surface tension measurements,and more accurate than that from I₃/I₁.

Key words: Betaine, Pyrene, Critical micelle concentration

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REN Xue-Zhen, LI Gan-Zuo, WANG Hong-Li, ZHAI Li-Min, SUI Wei-Pin, XU Xin-Yan. Studies on the Critical Micelle Concentration of N-Alkylbetaines by Fluorescence Probe[J]. Chem. J. Chinese Universities, 1995, 16(8): 1295.

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

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