Peculiarities of RYDMR spectrum of pairs of polarized triplet excitons

Abstract

The method of RYDMR (reaction yield detected magnetic resonance) has been applied for studying the annihilation of triplet excitons in crystals of the charge transfer complex anthracene-tetracyanobenzene at room temperature. It has been demonstrated that the optical polarization of spins of triplet excitons results in a non-uniform population of magnetic sub-levels of the short-lived intermediate complex during annihilation. The RYDMR spectra of these complexes reflect this phenomenon as the reversal of lines. Two-quanta microwave frequency transitions in intermediate complexes have been discovered. The life time of the complexes τ = 1.4 × 10-7 s has been determined. © 1978.