Two-dimensional transient electron spin resonance spectroscopy

Abstract

A two-dimensional field–time transient electron spin resonance spectrum is reported of the cyclohexyl-1-ol radical. The spectrum shows linewidth alternation effects due to a ring-flip process. The radical is polarized and its spectrum displays symmetric E/A characteristics at early times, showing the radicals to originate in the reaction of a triplet state, but these invert to an A/E pattern in time. At longer times still the spectrum exhibits excess emission. This represents a fourth case of radicals whose spectra show these time-dependent patterns.