The lowest excited singlet and triplet states of flavins have been investigated by means of luminescence polarization (photoselection) and P-P-P SCF-MO CI methods. The fluorescent and phosphorescent states of flavins of varying structures such as isoalloxazines (e.g., riboflavin), alloxazines (e.g., lumichrome), and lumazines (e.g., 6,7,8-trimethyllumazine) have been assigned (π,π*) symmetry. However, the (n,π*) states have been found to play a significant role in the luminescence processes of flavins, particularly of alloxazines. Attempts have been made to characterize various electronic transitions of flavins in the visible and near-uv regions of the absorption spectra, and to reconcile diverse spectroscopic data reported in the literature.
|Number of pages||11|
|Journal||Journal of the American Chemical Society|
|Publication status||Published - 1972|
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