Phosphorescence and optically detected magnetic resonance spectra of spin triplet states in neat KCrO3F, KCrO3Cl and K2Cr2O7

Abstract

The emission spectra at ⩽ 4 K of neat KCrO₃F and KCrO₃Cl are reported and assigned as phosphorescence from the CrO₃ X ^- chromophore. The zero field splittings (X = F and Cl) and kinetic parameters (X = Cl) of these and of the emissive spin triplet states in neat K₂Cr₂O₇ are also determined by ODMR methods. The energies, mean lifetimes, and fine structure constants D of the triplet states in the three systems are very similar.