Photophysical and photochemical processes of riboflavin (vitamin B2) by means of the transient absorption spectra in aqueous solution

被引：36

作者：

Lu, CY ^{[1
]}

Han, ZH ^{[1
]}

Liu, GS ^{[1
]}

Cai, XC ^{[1
]}

Chen, YL ^{[1
]}

Yao, S ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Nucl Res, Lab Radiat Chem, Shanghai 201800, Peoples R China

来源：

SCIENCE IN CHINA SERIES B-CHEMISTRY | 2001年 / 44卷 / 01期

基金：

中国国家自然科学基金;

关键词：

ribuflavin (RF); laser flash photolysis; excited tripler state; photoionization; redox reaction;

D O I：

10.1007/BF02879734

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：39 / 48

页数：10

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