C-13-NMR OF MICELLAR SOLUTIONS - MICELLAR AGGREGATION NUMBER FROM THE CONCENTRATION-DEPENDENCE OF THE C-13 CHEMICAL-SHIFTS

被引:117
作者
PERSSON, BO [1 ]
DRAKENBERG, T [1 ]
LINDMAN, B [1 ]
机构
[1] UNIV LUND,CTR CHEM,DIV PHYS CHEM,S-22007 LUND 7,SWEDEN
关键词
D O I
10.1021/j100486a015
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
13C NMR chemical shifts were determined as a function of concentration for aqueous solutions of sodium hexanoate, sodium octanoate, and nonylammonium bromide. Using the mass action law model for micelle formation, we have estimated the aggregation numbers by fitting calculated chemical shifts as a function of amphiphile concentration to the experimental values. For sodium octanoate and sodium hexanoate the calculations indicate the formation of an appreciable amount of premicellar aggregates with an aggregation number of about 3 or 4. For nonylammonium bromide the results are explained by the formation of large aggregates only. © 1979 American Chemical Society.
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页码:3011 / 3015
页数:5
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