Phosphorescence dithiolenes

Since it is well established that, with one exception,123 dithiolenes show neither fluorescence nor phosphorescence, any absorbed energy must be released through nonradiative relaxation processes, implying that their local environment will be heated. Dithiolenes thus can serve as sensitizers in processes where IR radiation would otherwise not be absorbed. One example is the local melting... 

Luminescence has been observed in fluid solution for the norbornadiene adduct of Pt(II) bis(l,2-diphenyl-1,2-dithiolene) (64). The broad, featureless band at 520 nm (4> = 4.5 x 10 3) in deaerated dichloromethane has been assigned to phosphorescence from a 3IL/MLCT excited state. 

Enedithiolates (dithiolenes ) were used originally together with other ligands for production of chelates of transition metals for determination by UVD. After the discovery of photophysical properties of Pt complexes of certain 1,2-enedithiolates, they were used as phosphorescence and fluorescence dual emitters for oxygen and proton detection. The analytical applications of 1,2-enedithiolates have been reviewed. ... 

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