Enhanced electrochemiluminescence of Ru(bpy)3(2+) by flavone compounds.
Flavones such as morin, rutin, quercitrin, quercetin and wogonin were found to be able to strongly enhance the electrochemiluminescence (ECL) of the Ru(bpy)(3)(2+) system. Based on this, a novel ECL method with good stability and reproducibility could be developed for determination of flavones. Under the optimum conditions, the enhanced ECL intensity was linear with the flavones concentration in a wide range. The detection limits (defined as S:N = 3) for morin, rutin, quercitrin, quercetin and wogonin were 3.2 x 10(-7) mol/L, 4.3 x 10(-7), 1.8 x 10(-7), 8.0 x 10(-8) and 1.0 x 10(-7 ) mol/L, respectively. In addition, the possible mechanism for the Ru(bpy)(3)(2+) ECL system in the presence of flavones is also discussed.
Lin
Zhenyu
Z
Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, People's Republic of China.
Chen
Jinhua
J
Chen
Guonan
G
D004563:Electrochemistry / Q000379:methods*; D044950:Flavanones / Q000032:analysis; D047309:Flavones / Q000032:analysis*; D005419:Flavonoids / Q000032:analysis; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods*; D009942:Organometallic Compounds / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000032:analysis; D015203:Reproducibility of Results; D012431:Rutin / Q000032:analysis; D012680:Sensitivity and Specificity
D044950:Flavanones; D047309:Flavones; D005419:Flavonoids; D009942:Organometallic Compounds; C415768:tris(2,2'-bipyridyl)ruthenium(II); C012526:quercitrin; D012431:Rutin; C008548:morin; D011794:Quercetin; C085514:wogonin