化学学报 ›› 1998, Vol. 56 ›› Issue (3): 238-243. 上一篇    下一篇

研究论文

甲醇-联吡啶钌(II)体系的电致化学发光研究

陈曦;贾丽;佐藤昌宪   

  1. 厦门大学化学系;国家教委材料和生命过程分析科学开放实验室;京都工艺纤维大学纤维学部分析化学实验室
  • 发布日期:1998-03-15

Study on the electrochemiluminescence based on tris(2, 2'-bipyridine) ruthenium and methanol

CHEN XI;JIA LI;ZUOTENG CHANGXIAN   

  • Published:1998-03-15

研究了碱性溶液中甲醇-联吡啶钌(II)[Ru(bpy)3^2^+]的电致化学发光行为。在玻碳电极上甲醇于+1.28V(vs.Ag/AgCl)处被氧化为甲氧基离子(CH3O.), 该自由基离子发生歧化反应, 生成激发态的甲醛(HCHO), 发出波长为545nm的光。另一方面当体系含有少量的Ru(bpy)3^2^+时会得到较强的发光信号, 发光波长为608nm, 该发光起因于在甲醇的氧化电位下, Ru(bpy)3^2^+被氧化成Ru(bpy)3^3^+, CH3O.与Ru(bpy)3^3^+反应, 生成激发态的Ru(bpy)3^2^+而发光。

关键词: 甲醇, 歧化反应, 电致发光, 联吡啶 P, 钌络合物, 玻碳电极

The luminescent electrooxidation of methanol in tris (2, 2'-bipyridine) ruthenium (II) [Ru(bpy)3^2^+] alkaline solution on a glassy carbon electrode has been studied. At the potential of +1.28V(vs. Ag/AgCl), methanol was oxidized to methoxyl radical, and the excited formaldehyde was generated by a disprotionation reaction of the methoxyl radical to yield light emission with the wavelength of 545nm. Brighter light emission could be found if small amount of Ru(bpy)3^2^+ was added. The luminescent wavelength was 608nm because Ru(bpy)3^2^+ was oxidized to Ru(bpy)3^3^+ and reacted with methoxyl radical to produce the excited state of Ru(bpy)3^2^+.

Key words: METHANOL, DISPROPORTIONATION REACTION, ELECTROLUMINESCENCE, BIPYRIDINE P, RUTHENIUM COMPLEX, GLASSY CARBON ELECTRODE

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