Delayed fluorescence of the flavomononucleotide complex.

Abstract

Long-lived emission spectra and delayed fluorescence decay curves of flavomononucleotide (FMN) in poly(vinyl alcohol) film (PVA) at room temperature were measured. Pulsed N2-laser excitation was used. It was found that the FMN complexes stabilized by PVA matrix show delayed fluorescence (band at about 540 nm) and phosphorescence (band at about 640 nm). The decay curves of the delayed fluorescence are two-exponential with decay times tau 1 = 62 +/- 1 ms and tau 2 = 15 +/- 1 ms.