Scanning electrochemical microscopy study of ion annihilation electrogenerated chemiluminescence of rubrene and [Ru(bpy)3]2+

Journal of the American Chemical Society
Joaquín Rodríguez-LópezAllen J Bard

Abstract

Scanning electrochemical microscopy (SECM) was used for the study of electrogenerated chemiluminescence (ECL) in the radical annihilation mode. The concurrent steady-state generation of radical ions in the microgap formed between a SECM probe and a transparent microsubstrate provides a distance-dependent ECL signal that can provide information about the kinetics, stability, and mechanism of the light emission process. In the present study, the ECL emission from rubrene and [Ru(bpy)(3)](2+) was used to model the system by carrying out experiments with the SECM and light-detecting apparatus inside an inert atmosphere box. We studied the influence of the distance between the two electrodes, d, and the annihilation kinetics on the ECL light emission profiles under steady-state conditions, as well as the ECL profiles when carrying out cyclic voltammetry (CV) at a fixed d. Experimental results are compared to simulated results obtained through commercial finite element method software. The light produced by annihilation of the ions was a function of d; stronger light was observed at smaller d. The distance dependence of the ECL emission allows the construction of light approach curves in a similar fashion as with the tip currents in ...Continue Reading

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Dec 5, 2008·Journal of the American Chemical Society·Joaquín Rodríguez-LópezAllen J Bard
Aug 6, 2010·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Qian WangAllen J Bard

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Citations

Jun 10, 2016·Journal of the American Chemical Society·Manuel PlazaHéctor D Abruña
Mar 25, 2015·Chemical Society Reviews·Zhongyuan LiuGuobao Xu
Jun 17, 2015·Physical Chemistry Chemical Physics : PCCP·E Ventosa, W Schuhmann
Jun 23, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhanao LvGuochuan Yin
Jan 17, 2019·Chemical Science·Hanan Al-KutubiKlaus Mathwig
Aug 2, 2019·Chemical Science·Christopher SandfordShelley D Minteer
Apr 25, 2021·Analytical and Bioanalytical Chemistry·Abubakar Abdussalam, Guobao Xu
Mar 18, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Teresa C CristarellaJoaquín Rodríguez-López

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