Monocyclic and acyclic 2-ene-1,4-diones have been investigated by electronic absorption and luminescence emission spectroscopies, as well as by the laser flash-photolysis technique (enedione triplet–triplet transient absorptions being observed). The energies of the three lowest excited singlet and of the lowest excited triplet states were determined. The observation of fluorescence emission from enediones (in EPA glass at 77 K) is reported for the first time.
L. H. Catalani, V. G. Toscano and I. P. de Arruda Campos, J. Chem. Soc., Perkin Trans. 2, 1995, 1863 DOI: 10.1039/P29950001863
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