PHOTOCHEMISTRY OF REDUCED LUMIFLAVIN IN ITS ACIDIC FORM |
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| Authors: | Nehama Lasser Haim Levanon Jehuda Feitelson |
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| Institution: | Department of Physical Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel |
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| Abstract: | Abstract— The photooxidation of reduced lumiflavin in its acidic form, LfH 3 +, takes place in two consecutive steps. Upon illumination of LfH 3 + in its absorption band at 313 nm the semiquinone, LfH 3 +, is formed. Two LfH 2 + ions are consumed for every LfH 2 + formed. Illumination of the semiquinone in its absorption band at 495 nm causes further oxidation so that the oxidized LfH+ ion is formed. In this reaction one LfH 3 + ion is photolyzed for every LfH+ formed. In addition, a hydrogen atom is released in the photooxidation of LfH 2 +. Mechanisms for the two photoreactions are proposed. |
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