Hydration of spin-trap cations as a source of hydroxyl adducts

Abstract

Exposure of dilute solutions of the spin-trap 5,5-dimethyl-1-pyrroline 1-oxide (DMPO) in fluorotrichloromethane containing traces of water to ⁶⁰Co γ-rays at 77 K gave the DMPO˙⁺ cation: annealing gave the four-line e.s.r. spectrum characteristic of the hydroxyl adduct.