Physical Strategy to Determine Absolute Electrochemiluminescence Quantum Efficiencies of Coreactant Systems Using a Photon-Counting Photomultiplier Device

被引：33

作者：

Chu, Kenneth ^{[1
]}

Adsetts, Jonathan R. ^{[1
]}

Ma, Jing ^{[1
]}

Zhang, Congyang ^{[1
]}

Hesari, Mahdi ^{[1
]}

Yang, Liuqing ^{[1
]}

Ding, Zhifeng ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2021年 / 125卷 / 40期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ELECTROGENERATED CHEMILUMINESCENCE; LUMINESCENCE; DEPENDENCE; ECL;

D O I：

10.1021/acs.jpcc.1c06342

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, using a photon-counting device, we outline our physical strategy to determine absolute electrochemiluminescence (or electrogenerated chemiluminescence, ECL) quantum efficiencies of coreactant systems in comparison with those in annihilation pathways. This absolute method addresses many of the issues with existing relative ECL efficiency measurements, including inconsistencies stemming from nonstandardized experimental conditions and incompatible luminophore systems. The absolute efficiency of the Ru(bpy)(3)(2+)/ tri-n-propylamine (TPrA) ECL coreactant system taken as an example was found to be 10.0 +/- 1.1% for the first time using 10 Hz potential stepping at a TPrA concentration of 10 miM, which quantifies a 3-fold enhancement in efficiency compared to that in the annihilation pathway. Our physical and analytical technique is anticipated to be an immediate and impactful methodology in the expanding field of ECL research.

引用

页码：22274 / 22282

页数：9

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