Abstract
The effect of the solid support on thermally activated delayed fluorescece (TADF) was investigated. Comparison of the molecular structures of supports and consideration of the energy levels of the absorption band and the fluorescence, and of lifetimes of emissions allowed the postulation of certain molecular criteria for the supports of TADF. The interactions of Tin-protoporphyrin IX dimethyl ester (Sn-PPDE) with a polyvinyl alcohol (PVA) were considered in detail. The hydrogen bonds (-OH-π-electron systems of Sn-PPDE) were found to contribute to fix Sn-PPDE rigidly in the PVA matrix, thereby minimizing non-radiative decay of the excited molecule in the triplet state.
