Journal
SCIENCE IN CHINA SERIES B-CHEMISTRY
Volume 44, Issue 1, Pages 39-48Publisher
SCIENCE PRESS
DOI: 10.1007/BF02879734
Keywords
ribuflavin (RF); laser flash photolysis; excited tripler state; photoionization; redox reaction
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Using time-resolved techniques of 337 and 248 nm laser flash photolysis, the photophysical and photochemical processes of riboflavin (RF, vitamin B-2) were studied in detail in aqueous solution. The excited triplet state of riboflavin ((RF)-R-3*) was produced with 337 nm laser, while under 248 nm irradiation, both (RF)-R-3* and hydrated electron (e(aq)(-)) formed from photoionization could be detected. Photobiological implications have been inferred on the basis of reactivity of 3RF* including energy transfer, electron transfer and hydrogen abstraction. The RF.+ was generated by oxidation of SO4.- radical with the aim of confirming the results of photolysis.
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