An ESR Study on Sodium Alkylbenzensulfonate Micelles

Abstract

Abstract:

The hyperfine splitting constant and the correlation time of 5-doxyl stearic acid in the solution of sodium alkylbenzensulfonates (ABS) were measured by electron paramagnetic resonance (ESR). The critical micelle concentration of ABS was determined and compared with the result derived from surface tension curve. It was found that the micelle microviscosity decreased and the micelle micropolarity increased with the carbon number of the short hydrophobic group at the ortho position of the sulfonic acid group.

Key words: ESR, critical micelle concentration, microviscosity, micropolarity, alkylbenzensulfonate

CLC Number:

O648

JIANG Xiao-Ming, Ding-Ning, Zhao-Sui. An ESR Study on Sodium Alkylbenzensulfonate Micelles[J]. Chinese Journal of Magnetic Resonance, 2012, 29(3): 388-392.

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