Abstract
Amphiphilic spin probes were used to investigate the structural and dynamical properties of ionic detergent aggregates. The analysis of the electron spin resonance spectra of the probes yielded information on the degree of motion and organization of molecules in micelles, on the effect of an ionic agent on the micellar structure, on the ability of detergents to form aggregates below their critical micelle concentration, and on the nonhomogeneous distribution of water-insoluble compounds in micelles. The results are analyzed in terms of the relevance of these phenomena to processes such as micellar catalysis, the mechanism of micelle formation, and the mechanism of solubilization of substrates by micelles. The possible effect of the rotational correlation time of the micelle on the observed spectral lineshapes is discussed.
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