Amplification Effect of CdS Quantum Dots on Electrogenerated Chemiluminescence of Ru(bpy)32+and Its Application in Determination of Catechol

VernacularTitle:硫化镉量子点对三联吡啶钌电化学发光的增敏作用及用于邻苯二酚的检测
Author: Ming-Li WANG ¹ ; Ya-Nan SUN ; Jia-Yi GUO ; Xue-Mei YANG ; Min-Li YANG
Author Information

1. 上海师范大学生命与环境科学学院
Keywords: Electrochemiluminescence; CdS quantum dots; Ruthenium tris(bipyridine); Catechol
From: Chinese Journal of Analytical Chemistry 2018;46(5):780-786
CountryChina
Language:Chinese
Abstract: The effect of CdS quantum dots (QDs) on the electrochemiluminescence (ECL) signal of Ru(bpy)32+ was studied. It was found that CdS QDs could enhance the anodic ECL of Ru(bpy)32+ by 4 times. The sensitization mechanism was discussed and the influence factors including concentrations of Ru (bpy)32+ and CdS QDs, pH of solution and scan rate on ECL intensity were investigated. On the basis of quenching effect of catechol on the ECL signal of CdS QDs-Ru(bpy)32+,a system for sensitive determination of catechol was established with a detection limit of 5.5 nmol/L (S/N=3). This method was applied to the detection of catechol in tea sample with satisfactory results.