Spectroscopy and photophysics of flavin-related compounds: 3-benzyl-lumiflavin.

Photochem Photobiol Sci 2005 Jun 11;4(6):463-8. Epub 2005 May 11.

Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 660-780 Poznań, Poland.

Molecular structure, spectroscopic and photophysical data for the singlet state of 3-benzyl-lumiflavin in different solvents are presented. Theoretical studies concerning singlet-singlet and triplet-triplet excitation energies were carried out using time-dependent density functional theory (TD-DFT) calculations. These predictions are in good agreement with the experimental results, which reflect the solvent interactions. All the observable singlet-singlet transitions have pi-pi* character. The title compound appears to be an efficient sensitizer of the production of singlet oxygen (phi(Delta)= 0.53). The crystal structure of 3-benzyl-lumiflavin is also presented, along with its solid-state photophysical data.

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June 2005
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