Molecular luminescence studies of flavins. I. The excited states of flavins

Ming Sun, Thomas A Moore, Pill Soon Song

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Abstract

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.

Original languageEnglish
Pages (from-to)1730-1740
Number of pages11
JournalJournal of the American Chemical Society
Volume94
Issue number5
Publication statusPublished - 1972

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ASJC Scopus subject areas

  • Chemistry(all)

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