Preliminary electrochemiluminescence study of allantoin in the presence of tris(2,2'-bipyridine) ruthenium (II).
Electrochemiluminescence (ECL) based on allantoin and tris(2,2'-bipyridine)ruthenium (II) [Ru(bpy)3 (2+)] was studied in aqueous alkaline buffer solution (pH 11.0). In a flowing system, the eluted allantoin was mixed with 1.0 mmol/L Ru(bpy)3 (2+). When the solution passed through a thin layer flow electrolytic cell equipped with a glassy carbon disc electrode (22.1 mm2), both hydroxyl groups of allantoin and Ru(bpy)3 (2+) were oxidized at the potential of +1.50 V (vs. Ag/AgCl). The luminescence with lambdamax 610 nm caused by the reaction of electrolytically formed Ru(bpy)3 (2+) with alkoxide radical to generate the excited state of Ru(bpy)3 (2+*). A possible ECL process of allantoin in Ru(bpy)3 (2+) alkaline solution has been discussed. In addition, the factors affecting the ECL response of allantoin are also investigated.
Chen
Xi
X
The Key Laboratory of Analytical Sciences of MOE and Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China. xichen@xmu.edu.cn
Tao
Ying
Y
Zhao
Li
L
Xie
Zenghong
Z
Chen
Guonan
G
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives / Q000737:chemistry; D000481:Allantoin / Q000737:chemistry*; D056831:Coordination Complexes; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D008163:Luminescent Measurements; D010084:Oxidation-Reduction; D017975:Ruthenium Compounds
D015082:2,2'-Dipyridyl; D000481:Allantoin; D056831:Coordination Complexes; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds