化学学报 ›› 2004, Vol. 62 ›› Issue (9): 860-863. 上一篇    下一篇

研究论文

细胞色素c在羟基磷灰石修饰玻碳电极上的直接电化学

秦玉华1,2, 张袁健2, 徐修冬2, 许宏鼎1, 李景虹2   

  1. 1. 吉林大学化学学院,长春,130023;
    2. 中国科学院长春应用化学研究所,电分析化学国家重点实验室,长春,130022
  • 投稿日期:2003-09-24 修回日期:2004-01-20 发布日期:2014-02-17
  • 通讯作者: 李景虹,E-mail:lijingh@ciac.jl.cn;Tel:0431-5262243. E-mail:lijingh@ciac.jl.cn
  • 基金资助:
    国家自然科学基金(No.20125513)资助项目.

Direct Electrochemistry of Cytochrome c at Hydroxyapatite Modified Glassy Carbon Electrodes

QIN Yu-Hua1,2, ZHANG Yuan-Jian2, XU Xiu-Dong2, XU Hong-Ding1, LI Jing -Hong2   

  1. 1. College of Chemistry, Jilin University, Changchun 130023;
    2. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:2003-09-24 Revised:2004-01-20 Published:2014-02-17

采用沉淀法合成羟基磷灰石纳米晶体,由于具有独特的多吸附位点特征,羟基磷灰石可作为一种新型电子传递促进剂用于细胞色素c的直接电化学研究.在pH 7.0的磷酸盐缓冲溶液中,细胞色素c在羟基磷灰石修饰玻碳电极表面于0.074 V (vs. Ag/AgCl) 处有一对准可逆的氧化还原峰,为细胞色素c血红素辅基Fe(Ⅲ)/Fe(Ⅱ)电对的特征峰.实验结果表明细胞色素c与羟基磷灰石之间的静电作用,促进了细胞色素c在玻碳电极表面扩散控制的准可逆单电子转移过程.讨论了电位扫描速度、溶液离子强度对细胞色素c直接电化学的影响.

关键词: 羟基磷灰石, 细胞色素c, 直接电化学

The nano-scale HAp was prepared with the precipitation method.Due to the particular multi-absorbing sites, hydroxyapatite can be used as a novel favorite promoter for the direct electrochemistry of cytochrome c (cytc c).Cyclic voltammogram of cyt c on the hydroxyapatite modified glassy carbon electrodes showed a pair of well-defined and nearly reversible peaks at about 0.074 V (vs.Ag/AgCl) in pH 7.0 PBS buffers, being the characteristic peaks of the cyt c heme Fe(Ⅲ)/Fe(Ⅱ) redox couples.The experimental results supported that the electrostatic interaction between cyt c and HAp gave a rapid one-electron diffusion-controlled electron transfer.It provided a good model for the study of redox processes in biological system.Spectral characterization verified the activity of cyt c retained.The effects of scan rate, ionic strength on the electrochemical behavior of cyt c were discussed in details.

Key words: hydroxyapatite(HAp), cytochrome c, direct electrochemistry