Cathodic Electrochemiluminescence of Meso-tetra(4-sulfophenyl)porphyrin/Potassium Peroxydisulfate System

Authors

Yan-fenga WANG, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;
Dia LUO, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;
Duo-liang SHAN, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;
Xiao-quan LU, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;Follow

Corresponding Author

Xiao-quan LU(luxq@nwnu.edu.cn)

Abstract

A new electrochemiluminescence (ECL) system in aqueous solution was constructed by using meso-tetra(4-sulfophenyl)porphyrin (TSPP) as a luminophoreand potassium peroxydisulfate (K2S2O8) as a reductive–oxidative coreactant. Upon sweeping from 0 V to -1.5 V, two cathodic ECL peaks were found simultaneously. One appeared at -0.8 V, which is corresponding to the reduction of TSPP, another at -1.2 V, that is attributed to the reduction of K2S2O8. And methylene blue could quench the ECL of TSPP effectively. In accordance with the linearity between quenching efficiency and the concentration of methylene blue, a method to determine methylene blue was established. The ECL mechanism was also studied through a series of experiments.

Graphical Abstract

Keywords

electrochemiluminescence, meso-tetra(4-sulfophenyl)porphyrin, cathode; K2S2O8, methylene blue

DOI Link

https://doi.org/10.13208/j.electrochem.161042

Publication Date

2017-06-29

Online Available Date

2016-12-23

Revised Date

2016-12-14

Received Date

2016-10-24

Recommended Citation

Yan-fenga WANG, Dia LUO, Duo-liang SHAN, Xiao-quan LU. Cathodic Electrochemiluminescence of Meso-tetra(4-sulfophenyl)porphyrin/Potassium Peroxydisulfate System[J]. Journal of Electrochemistry, 2017 , 23(3): 307-315.
DOI: 10.13208/j.electrochem.161042
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss3/6