Phosphorescence thermal stability

Several techniques are used to follow the photoreactions their intermediates and the reaction products. Fluorescence, phosphorescence, U V or visible spectra, or chromatography can be used to follow the lifetime of the excited state. Recently, the thermal grating method was used to study various processes involved in photoreactions [2], Stabilizers of a certain type of intermediate (singlet or triplet) or the opposite (quencher) were used to determine which kind of intermediate is active. 

T.Y.-H. Lee, Q. Wang, J.U. Wallace, S.H. Chen, Temporal stability of blue phosphorescent organic light-emitting diodes affected by thermal annealing of emitting layers. J. Mater. Chem. 22, 23175-23180 (2012)... 

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