Studies on Photoinduced Electron and Proton Transfer Reactions of Nucleic Acid and Aromatic Ketone
WANG Jin-ting1, SUN Qian1, GE Ai-min1, PAN Yang2, ZHANG Li-min1, YU Shu-qin1*
1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China 2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
Abstract：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 kq and the free energy changes (ΔG) of the electron transfer reaction.
Key words：Nucleic acid;Benzophenone;Xanthone;Electron transfer;Proton transfer
王金婷1，孙 倩1，葛爱民1，潘 洋2，张立敏1，俞书勤1* . 核苷酸和芳香酮的电子转移和质子转移反应研究[J]. 光谱学与光谱分析, 2010, 30(04): 875-878.
WANG Jin-ting1, SUN Qian1, GE Ai-min1, PAN Yang2, ZHANG Li-min1, YU Shu-qin1* . Studies on Photoinduced Electron and Proton Transfer Reactions of Nucleic Acid and Aromatic Ketone. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(04): 875-878.
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