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The enhanced electrogenerated chemiluminescence of Ru(bpy)32+ by glutathione on a glassy carbon electrode modified with some porphine compounds

2000; Royal Society of Chemistry; Volume: 125; Issue: 12 Linguagem: Inglês

10.1039/b005448h

1364-5528

Chen Guo Nana, Jian Wang, Duan Jian Pinga, Chen Qing, Xi Chen, Zhao Zheng Feng,

Molecular Sensors and Ion Detection

It has been found that the electrochemical activity of glutathione was increased greatly at the glassy carbon electrodes modified with 5,10,15,20-tetraphenylporphine ruthenium(II) carbenyl (RuTPP), meso-tetraphenylporphine copper(II) complex (CuTTP) and hemin. It has been also found that glutathione would enhance the electrogenerated chemiluminescence (ECL) of Ru(bpy)3(2+) at a hemin glassy carbon electrode; the enhanced ECL intensity was linear with the concentration of glutathione in the range of 1 x 10(-7)-1 x 10(-4) mol l-1, based on which method for determination of glutathione has been developed. The detection limit of glutathione was 2 x 10(-8) mol l-1, and the relative standard deviation for 1 x 10(-6) mol l-1 glutathione was 2.7%. The mechanism for this ECL system has been proposed.