Studies on Photoinduced Electron and Proton Transfer Reactions of Nucleic Acid and Aromatic Ketone

被引：1

作者：

Wang Jin-ting ^{[1
]}

Sun Qian ^{[1
]}

Ge Ai-min ^{[1
]}

Pan Yang ^{[2
]}

Zhang Li-min ^{[1
]}

Yu Shu-qin ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2010年 / 30卷 / 04期

关键词：

Nucleic acid; Benzophenone; Xanthone; Electron transfer; Proton transfer; LASER FLASH-PHOTOLYSIS; H-ATOM TRANSFER; AQUEOUS-SOLUTION; TRIPLET-STATE; DNA; XANTHONE; BENZOPHENONE; ABSORPTION; OXIDATION; PATHWAYS;

D O I：

10.3964/j.issn.1000-0593(2010)04-0875-04

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The transient absorption spectra of two aromatic ketones (benzophenone (BP), xanthone (XT)) and four nucleic acids (guanosine 5'-monophosphate (GMP), adenosine 5'-monophosphate (AMP), cytidine 5'-monophosphate (CMP), thymidine 5'-monophosphate (TMP)) were obtained in 1 : 1 CH3CN/H2O solution by using time-resolved laser flash photolysis at 355 nm. From the changes of the transient absorption spectra the authors can conclude that photoinduced proton transfer following electron transfer from GMP and AMP to excited BP and XT occurs, which is in accordance with free energy change of the reactions. For CMP and TMP, electron transfer and proton transfer do not appear because no ketyl and anion radical are generated. In addition, the rate constants for electron transfer from GMP, AMP, CMP, and TMP to the excited BP and XT were determined. As can be seen, there is a good correlation between k(q) and the free energy changes (Delta G) of the electron transfer reaction.

引用

页码：875 / 878

页数：4

共 24 条

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