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Dual Enhancement of Gold Nanocluster Electrochemiluminescence: Electrocatalytic Excitation and Aggregation-Induced Emission |
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| Authors: | Dr Huaping Peng Zhongnan Huang Dr Haohua Deng Weihua Wu Kaiyuan Huang Zhenglian Li Prof Wei Chen Prof Juewen Liu |
| Institution: | 1. Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350108 P. R. China;2. Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350108 P. R. China
These authors contributed equally to this work.;3. Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada |
| Abstract: | Ligand-protected gold nanoclusters (AuNCs) have emerged as a new class of electrochemiluminescence (ECL) luminophores for their interesting catalytic and emission properties, although their quantum yield (ΦECL) in aqueous medium is low with a poor mechanistic understanding of the ECL process. Now it is shown that drying AuNCs on electrodes enabled both enhanced electrochemical excitation by an electrocatalytic effect, and enhanced emission by aggregation-induced ECL (AIECL) for 6-aza-2-thiothymine (ATT) protected AuNCs with triethylamine (TEA) as a coreactant. The dried ATT-AuNCs/TEA system resulted in highly stable visual ECL with a ΦECL of 78 %, and a similar enhancement was also achieved with methionine-capped AuNCs. The drying enabled dual-enhancement mechanism has solved a challenging mechanistic problem for AuNC ECL probes, and can guide further rational design of ECL emitters. |
| Keywords: | Biosensoren Elektrokatalyse Gold-Nanocluster Sichtbare Lumineszenz Trocknen |