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Laser Flash Photolysis Study on Electron Transfer Oxidation Reaction of Tryptophan or Tyrosine with Triplet State Vitamin K-3 | |
Tang, RZ(唐睿智); Li, HX(李海霞); Liu, YC(刘艳成); Zhang, P(张鹏); Cao, XY(曹西艳); Wang, WF(王文锋) | |
2012 | |
Source Publication | ACTA PHYSICO-CHIMICA SINICA
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ISSN | 1000-6818 |
Volume | 28Issue:1 |
Abstract | Laser flash photolysis was used to study the photosensitized oxidation mechanism of vitamin K-3, commonly known as 2-methyl-1,4-naphthoquinone (MQ), with tryptophan (TrpH) or tyrosine (TyrOH) in acetonitrile/water (1:1, V/V) solution. The triplet state of MQ reacted with TrpH or TyrOH by electron transfer with the formation of a MQ anion radical, which was directly observed in the transient absorption spectrum. The rate constants of the electron transfer reactions were determined to be 1.1 x 10(9) and 0.6 x 10(9) L.mol(-1).s(-1) for TrpH and TyrOH, respectively. The free energy changes (Delta G) of the reactions showed that the proposed electron transfer steps are thermodynamically feasible. |
Language | 英语 |
Funding Project | 应物所项目组 |
WOS ID | WOS:000299721900030 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.sinap.ac.cn/handle/331007/13206 |
Collection | 中科院上海应用物理研究所2011-2020年 |
Recommended Citation GB/T 7714 | Tang, RZ,Li, HX,Liu, YC,et al. Laser Flash Photolysis Study on Electron Transfer Oxidation Reaction of Tryptophan or Tyrosine with Triplet State Vitamin K-3[J]. ACTA PHYSICO-CHIMICA SINICA,2012,28(1). |
APA | Tang, RZ,Li, HX,Liu, YC,Zhang, P,Cao, XY,&Wang, WF.(2012).Laser Flash Photolysis Study on Electron Transfer Oxidation Reaction of Tryptophan or Tyrosine with Triplet State Vitamin K-3.ACTA PHYSICO-CHIMICA SINICA,28(1). |
MLA | Tang, RZ,et al."Laser Flash Photolysis Study on Electron Transfer Oxidation Reaction of Tryptophan or Tyrosine with Triplet State Vitamin K-3".ACTA PHYSICO-CHIMICA SINICA 28.1(2012). |
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