SPECTROSCOPY AND PHOTOPHYSICS OF ENYL]SPIRO-[FLUORENE-9,4'-OXAZOLIDINE]-2',5'-DIONE

Electronic absorption and emission spectroscopy of tile title molecule has been studied in solution, low-temperature glasses and polymer mat rices. No luminescence could be observed down to 77 K. In the presence of water, the formation of the hydrated species was observed, accompa nied by the appearance of phosphorescence. The structure and spectra o f both forms were calculated using molecular mechanics and quantum che mical methods. The lack of phosphorescence in the anhydride is interpr eted as due to proximity effects in the triplet manifold.