Study of radical cations ofcis- andtrans-decalin in nonpolar solutions by the MARY and optically detected ESR spectroscopy

Abstract

Radical cations ofcis- andtrans-decalin in nonpolar solvents were studied by optically detected ESR and magnetically affected reaction yield (MARY) spectroscopy. The observed differences in the spectra ofcis- andtrans-decalin are in agreement with the assumption of the existence of temperature-activated intramolecular dynamic transitions in the radical cation oftrans-decalin. Using MARY spectroscopy, the signals of the corresponding radical cations were detected at room temperature in diluted solutions containingcis- andtrans-decalin molecules as acceptors. Under these conditions, the total recovery of dynamic transitions in the radical cation oftrans-decalin is observed. Radical cations of bothcis- andtrans-decalin participate in the reaction of the ion-molecular charge transfer to a neutral molecule; the rate constant of this reaction is close to the diffusion-controlled one.