TY - JOUR
T1 - Insights into the electrochemiluminescence process of a hydrogen bonding iridium(III) complex
AU - Yang, Liuqing
AU - Zhang, Ruizhong
AU - Balónová, Barbora
AU - True, Allison E.
AU - Chu, Kenneth
AU - Adsetts, Jonathan R.
AU - Zhang, Congyang
AU - Qin, Xiaoli
AU - Zysman-Colman, Eli
AU - Blight, Barry A.
AU - Ding, Zhifeng
N1 - Funding information: ZD acknowledges that this work is financially supported by Natural Sciences and Engineering Research Council Canada (NSERC; DG RGPIN-2018-06556 and SPG STPGP-2016-493924), Canada Foundation of Innovation/Ontario Innovation Trust (CFI/OIT, 9040) and The University of Western Ontario. We appreciate very much the quality service from our Electronic Shop in Chemistry and ChemBioStores at Western. BAB is gratefully funded by NSERC (DG RGPIN-2018-04021), New Brunswick Foundation for Innovation (NBIF; RAI-2019-023) and the University of New Brunswick. Many thanks to Prof. Guobao Xu at CIAC for organizing the 3rd International Electrochemiluminescence Workshop in this wonderful 18th ISEAC.
PY - 2022/9/1
Y1 - 2022/9/1
N2 - Hydrogen-bonding has been reported as a smart strategy in electrochemiluminescence (ECL) mechanism studies and sensing applications. However, the insights into the hydrogen-bonding effect on ECL behavior have never been clearly demonstrated. This work reports ECL of complex 1•3 based on the hydrogen-bonding interaction between an IrIII complex (1) and pyrimido-[4,5-c]isoquinolin-3-amine (3). In their cyclic voltammograms (CVs), both complex 1 and compound 3 did not show any reductions; however, the hydrogen-bonding complex 1•3 displayed a new reduction upon the mixture of 1 and 3, which could be significantly weakened by the addition of DMF. In a co-reactant ECL pathway with BPO, exciplex [PhCO2•1] and excimer [3•3] were produced, which were demonstrated by PL and ECL spectroscopies. Furthermore, benzoate radical PhCO2 could also react with the hydrogen-bonding complex 1•3 to form [PhCO2•1•3] and generate the same ECL emission as [PhCO2-1]. Our report provides insights into the ECL processes of this hydrogen-bonding complex.
AB - Hydrogen-bonding has been reported as a smart strategy in electrochemiluminescence (ECL) mechanism studies and sensing applications. However, the insights into the hydrogen-bonding effect on ECL behavior have never been clearly demonstrated. This work reports ECL of complex 1•3 based on the hydrogen-bonding interaction between an IrIII complex (1) and pyrimido-[4,5-c]isoquinolin-3-amine (3). In their cyclic voltammograms (CVs), both complex 1 and compound 3 did not show any reductions; however, the hydrogen-bonding complex 1•3 displayed a new reduction upon the mixture of 1 and 3, which could be significantly weakened by the addition of DMF. In a co-reactant ECL pathway with BPO, exciplex [PhCO2•1] and excimer [3•3] were produced, which were demonstrated by PL and ECL spectroscopies. Furthermore, benzoate radical PhCO2 could also react with the hydrogen-bonding complex 1•3 to form [PhCO2•1•3] and generate the same ECL emission as [PhCO2-1]. Our report provides insights into the ECL processes of this hydrogen-bonding complex.
KW - Electrochemiluminescence
KW - Hydrogen bonding
KW - Iridium(III) complex
KW - Exciplex
KW - Excimer
U2 - 10.1016/j.jelechem.2022.116594
DO - 10.1016/j.jelechem.2022.116594
M3 - Article
SN - 1572-6657
VL - 920
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
M1 - 116594
ER -