Persistent luminescence of complex molecule vapors

• Published in: Journal of luminescence 1970, Vol.1-2, p.513-513
• Main Authors: Borisevich, N.A., Gruzinsky, V.V., Kotov, A.A.
• Format: Article
• Language: English
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/0022-2313(70)90063-3

We report an analysis of experiments on persistent luminescence of complex molecule vapors. Carbonyl-containing compounds which differed in the various positions of singlet and triplet π π* and n π* levels; anthraquinone, benzophenone, 4-phenylbenzophenone, and benzanthrone were studied. The first two compounds have a persistent luminescence and, under established conditions, fluorescence, the spectra of which coincide. Benzanthrone shows two components of luminescence. Electronic spectra were obtained and analyzed, as to length of time and quantitative yield under different temperatures, vapor concentrations and frequencies of exciting radiation. The influence of extraneous gases on the luminescence characteristics of these substances was also studied. An analysis is given of the mechanism of the phosphorescence of the compounds examined. It was ascertained that persistent luminescence of the first three substances amounts to α-phosphorescence, while long wave luminescence of benzanthrone is a β-phosphorescence.