摘要
The electrochemical character of bilirubin（BR）-M2+(M2+=Cd2+,Cu2+,Zn2+,Ca2+,Fe2+)Langmuir-Blodgett（LB）film modified glassy carbon electrode was investigated,and was compared with that of BR-LB film modified glassy carbon electrode and that of BR and M2+in solution.On BR-M2+-LB film modified glassy carbon electrodes,one anodic peak for BR-M2+ complex was observed at-679～-842mV,and the anodic peak potential of BR shifted towards to ositive from 453 mV to 477～493 mV.BR-M2+（in solution）formed BR-M2+ complex with BR on the BR-LB film modified glassy carbon electrode,at the same time,M2+permeated BR-LB film and occrred electrode reaction.The anodic peak potential of BR-M2+ complex on LB film shifted towards positive with the increasing of stability of biologic metal complex.In BR and M2+ solution,the potentials of two anodic peaks for BR（400 mV and 305 mV）was shifted positive 19～51 mV due to BR-M2+ complex forming,and this potential was effected by the ratio of BR and M2+.Moreover,a pair of symmetrical adsorption peak was appeared at nearly 0 mV,which indicated the hydrophobicity of this complex molecule was stronger than that of BR molecule.
The electrochemical character of bilirubin(BR)-M^(2+)(M^(2+)=Cd^(2+),Cu^(2+),Zn^(2+),Ca^(2+),Fe^(2+))Langmuir-Blodgett(LB)film modified glassy carbon electrode was investigated,and was compared with that of BR-LB film modified glassy carbon electrode and that of BR and M^(2+)in solution.On BR-M^(2+)-LB film modified glassy carbon electrodes,one anodic peak for BR-M^(2+) complex was observed at-679～-842mV,and the anodic peak potential of BR shifted towards to ositive from 453 mV to 477～493 mV.BR-M^(2+)(in solution)formed BR-M^(2+) complex with BR on the BR-LB film modified glassy carbon electrode,at the same time,M^(2+)permeated BR-LB film and occrred electrode reaction.The anodic peak potential of BR-M^(2+) complex on LB film shifted towards positive with the increasing of stability of biologic metal complex.In BR and M^(2+) solution,the potentials of two anodic peaks for BR(400 mV and 305 mV)was shifted positive 19～51 mV due to BR-M^(2+) complex forming,and this potential was effected by the ratio of BR and M^(2+).Moreover,a pair of symmetrical adsorption peak was appeared at nearly 0 mV,which indicated the hydrophobicity of this complex molecule was stronger than that of BR molecule.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2005年第3期406-408,共3页
Chemical Research and Application
基金
广东省自然科学基金资助项目(31884)
国家自然科学基金资助项目(20271022)
关键词
胆红素
胆红素-M^2+络合物
LB膜
电化学特性
Bilirubin
bilirubin-M^(2+)complex
Langmuir-Blodgett
electrochemical characteristics
