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Laser Photolysis Study on Photo-Oxidation Reactions of Aromatic Amino Acids with Triplet 2-Methylanthraquinone
Cao Xi-yan; Fu Hai-ying; Zhu Li; Wu Guo-zhong
2013
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
Volume33Issue:4Pages:CONCATENATE(Sheet1!I190,-Sheet1!J190)
AbstractThe transient photo-sensitive oxidation between 2-methylanthraquinone (MAQ) and aromatic amino acids (namely tryptophan, tyrosine and phenylalanine) in acetonitrile/water (1 1, V/V) solution was investigated by laser photolysis techniques with the excitation wavelength of 355 nm. The triplet state absorption of 2-methylanthraquinone was attributed to 390, 450 and 590 nm and the anion radical absorption of MAQ was due to 390 and 490 nm identified by the electron transfer reactions from 4-diazabicyclo [2. 2. 2] octane (DABCO) or diphenylamine (DPA) to (3)MAQ*. With the decay of (3)MAQ*, the MAQ(center dot-) at 490 nm appeared, which indicated that the electron transfer reactions between 3MAQ* and amino acids occurred. Moreover, the rate constants were deduced to be 3. 0 X 10(9), 1.1X 10(9) andl. 8X10(8) L.mol(-1) s(-1) for TrpH, TyrOH and PHE, respectively. On the other hand, the free energy changes (Delta G) of the reactions showed that the proposed electron transfer steps are thermodynamically feasible.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000317634400012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13802
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Cao Xi-yan,Fu Hai-ying,Zhu Li,et al. Laser Photolysis Study on Photo-Oxidation Reactions of Aromatic Amino Acids with Triplet 2-Methylanthraquinone[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2013,33(4):CONCATENATE(Sheet1!I190,-Sheet1!J190).
APA Cao Xi-yan,Fu Hai-ying,Zhu Li,&Wu Guo-zhong.(2013).Laser Photolysis Study on Photo-Oxidation Reactions of Aromatic Amino Acids with Triplet 2-Methylanthraquinone.SPECTROSCOPY AND SPECTRAL ANALYSIS,33(4),CONCATENATE(Sheet1!I190,-Sheet1!J190).
MLA Cao Xi-yan,et al."Laser Photolysis Study on Photo-Oxidation Reactions of Aromatic Amino Acids with Triplet 2-Methylanthraquinone".SPECTROSCOPY AND SPECTRAL ANALYSIS 33.4(2013):CONCATENATE(Sheet1!I190,-Sheet1!J190).
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