Coupled 13C longitudinal and transverse magnetic relaxation in micellar and non-micellar sodium octanoate

Abstract

Coupled ¹³C longitudinal (R₁) and transverse (R₂) relaxation rates of the CH₂-2 group in sodium octanoate have been studied at 20.1, 75.5 and 125.7 MHz. In the non-micellar state there is little cross-correlation between the C—H bonds, but in the micelle cross-correlation is strongly positive. Values of R₁, R₂ and nuclear Overhauser enhancements can all be interpreted in terms of the simple two-step correlation function proposed by B. Lindman and co-workers. An exchange effect on R₂ due to acid–salt exchange was detected.