Ru(bipy)_3^(2+)/Ru(phen)_3^(2+)-有机酸-Ce^（Ⅳ）化学发光反应动力学比较研究  

A Comparative Kinetic Study of Ru(bipy)_3^(2+) /Ru(phen)_3^(2+)-Organic Acids-Ce~Ⅳ Chemiluminescence Reactions

作　　者：吴风武[1] 何治柯[1] 罗庆尧 曾云鹗[1] 

机构地区：[1]武汉大学化学与环境科学学院,武汉430072

出　　处：《武汉大学学报（自然科学版）》1999年第6期829-832,共4页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学青年基金!(29605001);湖北省自然科学基金!资助课题(96J040)

摘　　要：对结构相似的有机酸如:乳酸,丙氨酸,丙酮酸,草酸在Ru(bipy)2+3 /Ru(phen)2+3 -有机酸(HA)-CeⅣ(bipy= 2,2'-联吡啶, phen= 1,10-邻菲咯啉)体系中的化学发光反应动力学进行了比较研究.CeⅣ氧化Ru(bipy)2+3 /Ru(phen)2+3 的发光强度在上述各种有机酸存在下被增强. 实验表明,在相同浓度下Ru(phen)2+3 的发光强度高于Ru(bipy)2+3 的发光强度. 几种有机酸对发光强度的增强效果为:乳酸< 丙氨酸< 丙酮酸< 草酸. 在不同有机酸存在下,该化学发光反应的活化能可降低7～14 kcal·m ol- 1.A comparative kinetic study of chemiluminescence (CL) reaction of structurally related organic acids (HA) viz. lactic, alanine, pyruvic and oxalic acid in the system Ru(bipy) 2+ 3(bipy=2,2'\|bipyridine)/Ru(phen) 2+ 3(phen=1,10\|phenanthroline)\|HA\|Ce Ⅳ is carried out. The emission intensity of the oxidation of Ru(bipy) 2+ 3/Ru(phen) 2+ 3 by Ce Ⅳ is enhanced in the presence of each of these organic acids. It is observed that the emission intensity of Ru(phen) 2+ 3 is higher than that of Ru(bipy) 2+ 3 with same concentration and the enhance effect increases in the order lactic<alanine<pyruvic<oxalic acid. The activation energy of these reactions can be reduced 30~58 kJ·mol -1 in the presence of different organic acids.

关 键 词：有机酸 化学发光反应 铈 钌配合物 动力学 

分 类 号：O614.332[理学—无机化学] O657.3[理学—化学]