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1,4,7,10-四氮杂环十二烷合钴与牛血清白蛋白的相互作用

刘凡*,张元勤,张智锦   

  1. (乐山师范学院化学与生命科学学院 乐山 614004)
  • 收稿日期:2012-04-09 修回日期:2012-05-26 出版日期:2013-02-10 发布日期:2013-02-10
  • 通讯作者: 刘凡，高级实验师; Tel/Fax:0833-2270251; E-mail:liuf6410@lsnu.edu.cn; 研究方向：表面化学及化学动力学
  • 基金资助:
    四川省教育厅科研基金资助项目（08zc038）

Interaction of 1,4,7,10-Tetraazacyclododecane-Co(Ⅱ) with Bovine Serum Albumin

LIU Fan*, ZHANG Yuanqin, ZHANG Zhijin   

  1. (College of Chemistry and Life Science,Leshan Normal University,Leshan 614004,China)
  • Received:2012-04-09 Revised:2012-05-26 Published:2013-02-10 Online:2013-02-10

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摘要： 利用荧光光谱法，研究了1,4,7,10-四氮杂环十二烷合钴（Cyclen-Co(Ⅱ)）配合物与牛血清白蛋白（BSA）的相互作用，用Stern-Volmer和LineweaverBurk方程确定了其荧光猝灭机理为静态猝灭，计算得到了在不同温度和pH值条件下以及在聚氧乙烯（23）月桂醇醚（Brij35）、十六烷基三甲基溴化铵（CTAB）、十二烷基硫酸钠（SDS）3种表面活性剂胶束溶液中，Cyclen-Co(Ⅱ)和BSA作用的结合点位数、结合常数和热力学参数，研究结果表明，其作用力主要为氢键和范德华力。

关键词: 四氮杂环十二烷合钴, 牛血清白蛋白, 荧光光谱, 结合位点数, 结合常数

Abstract: The interaction of Cyclen-Co(Ⅱ) with bovine serum albumin(BSA) was investigated by fluorescence method. The results show that the Cyclen-Co(Ⅱ) strongly quenches the fluorescence of BSA. It has been proved that the fluorescence quenching mechanism belongs to the static quenching by Stern-Volmer equation and Lineweaver-Burk equation. According to Lineweaver-Burk equation and thermodynamics equation, the binding constants, binding sites and thermodynamics parameters were obtained at different temperatures in the aqueous solution and in the solutions of Brij35, CTAB, SDS surfactants. The Van der Waals′ forces play a main role in the binding of Cyclen-Co(Ⅱ) with BSA.

Key words: tetraazacyclododecane-Co(Ⅱ), Bovine serum albumin, fluorescence spectroscopy, Binding numbers, binding equilibrium constant

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