物理化学学报 >> 1999, Vol. 15 >> Issue (11): 1030-1035.doi: 10.3866/PKU.WHXB19991114

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Vitamin K1在水-有机溶剂中单电子还原电位的测定

陈家富, 储高升, 葛学武, 张志成, 姚思德   

  1. 中国科学技术大学应用化学系,合肥 230026|中国科学院上海原子核研究所辐射化学开放实验室,上海 201800
  • 收稿日期:1999-01-28 修回日期:1999-03-22 发布日期:1999-11-15
  • 通讯作者: 陈家富

Determination of One-Electron Reduction Potential of Vitamin K1 in Mixed Solvent

Chen Jia-Fu, Chu Gao-Sheng, Ge Xue-Wu, Zhang Zhi-Cheng, Yao Si-De   

  1. Department of Applied Chemistry,University of Science and Technology of China,Hefei 230026|Labaratory of Radiation Chemistry,shanghai Institute of Nuclear Research,Chinese Academy of Science,Shanghai 201800
  • Received:1999-01-28 Revised:1999-03-22 Published:1999-11-15
  • Contact: Chen Jia-Fu

关键词: Vitamin K1, 单电子还原电位, 脉冲辐解

Abstract:

The reaction process of VK1 and isopropanol radical has been investigated by using pulse radiolytical technique. It has been found that the reduction states of VK1 exist in two forms under different pH conditions, that are VK1H•(pH < 5.4) and VK1-• (pH > 5.4), their maximum absorption peaks are 370 nm and 390 nm respectively. Selecting MV2+as the refereance, the one electron reduction potential of VK1 in N2 saturated aqueous isopropanol acetone mixed solvent and in N2O saturated water-isopropanol has been determined as -266 and -279mV respectively.

Key words: Vitamin K1, One-electron reduction potential, Pulse radiolysis