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Photo-dynamics of Roseoflavin and Riboflavin in Aqueous and Organic Solvents

Zirak, Peyman ; Penzkofer, Alfons ; Mathes, Tilo ; Hegemann, Peter



Abstract

Roseoflavin (8-dimethylamino-8-demethyl-D-riboflavin) and riboflavin in aqueous and organic solvents are studied by optical absorption spectroscopy, fluorescence spectroscopy, and fluorescence decay kinetics. Solvent polarity dependent absorption shifts are observed. The fluorescence quantum yields are solvent dependent. For roseoflavin the fluorescence decay shows a bi-exponential dependence (ps ...

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