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.
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.
Zhenyu
Z
Lin
Jinhua
J
Chen
Guonan
G
Chen
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