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Citation: WANG Ming-Li, SUN Ya-Nan, GUO Jia-Yi, YANG Xue-Mei, YANG Min-Li. Amplification Effect of CdS Quantum Dots on Electrogenerated Chemiluminescence of Ru(bpy)₃²⁺ and Its Application in Determination of Catechol[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(5): 780-786. doi: 10.11895/j.issn.0253-3820.171276 shu

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

College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, China

Received Date: 27 September 2017
Revised Date: 8 March 2018

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.
- Electrochemiluminescence,
- CdS quantum dots,
- Ruthenium tris(bipyridine),
- Catechol
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Amplification Effect of CdS Quantum Dots on Electrogenerated Chemiluminescence of Ru(bpy)32+ and Its Application in Determination of Catechol

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通讯作者: 陈斌, bchen63@163.com

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