化学学报 ›› 2004, Vol. 62 ›› Issue (16): 1519-1523. 上一篇    下一篇

研究论文

稀土杂多酸盐EuHSiMo10W2O40·25H2O与BSA相互作用的研究

胡艳军, 刘义, 侯安新, 赵儒铭, 屈啸声, 屈松生   

  1. 武汉大学化学与分子科学学院, 武汉, 430072
  • 投稿日期:2003-11-13 修回日期:2004-04-30 发布日期:2014-02-17
  • 通讯作者: prof.liuyi@263.net
  • 作者简介:刘义:E-mail:prof.liuyi@263.net;Tel:027-87218304;Fax:027-87647617
  • 基金资助:
    国家自然科学基金(No.20373051)和教育部高校优秀青年教师教学科研奖励计划(2001)资助项目.

Studies on the Interaction between Rare-earth Salts of Heteropoly EuHSiMo10W2O40· 25H2O and Bovine Serum Albumin

HU Yan-Jun, LIU Yi, HOU An-Xin, ZHAO Ru-Ming, QU Xiao-Sheng, QU Song-Sheng   

  1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072
  • Received:2003-11-13 Revised:2004-04-30 Published:2014-02-17

应用荧光光谱和紫外吸收光谱研究了稀土杂多酸盐EuHSiMo1oW2O40·25H2O(EuW2)与牛血清白蛋白(BSA)的相互作用,探讨了EuW2对BSA的荧光猝灭过程的猝灭机理,测定了不同温度下该结合反应的结合常数、结合位点数、结合热力学参数,并依据能量转移理论确定了给体-受体间的结合距离;用同步荧光技术考察了EuW2对BSA构象的影响.

关键词: 杂多酸稀土盐, 牛血清白蛋白, 荧光猝灭, 光谱法, 热力学参数

The rare-earth salts of heteropoly acid, EuHSiMo10W2O40·25H2O (EuW2), have been synthesized and characterized.The binding reaction between EuW2 and bovine serum albumin (BSA) was investigated by fluorescence and UV-vis absorption spectroscopy.It is proved that the fluorescence quenching of BSA by EuW2 is a result of the formation of BSA-EuW2 complex.The binding site number n, apparent binding constant K and corresponding thermodynamic parameters were measured at different temperatures by fluorescence quenching method.The binding distance r between EuW2 and BSA was obtained according to Förster theory of non-radiation energy transfer.The effect of EuW2 on the conformation of BSA was analyzed using synchronous fluorescence spectroscopy.

Key words: rare2earth salt of heteropoly acid, bovine serum albumin, fluorescence quenching, spectroscopic methodology, thermodynamic parameter