Dual Enhancement of Gold Nanocluster Electrochemiluminescence: Electrocatalytic Excitation and Aggregation‐Induced Emission

  • Huaping Peng
    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
  • Zhongnan Huang
    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
  • Haohua Deng
    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
  • Weihua Wu
    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
  • Kaiyuan Huang
    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
  • Zhenglian Li
    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
  • Wei Chen
    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
  • Juewen Liu
    Department of Chemistry Waterloo Institute for Nanotechnology University of Waterloo Waterloo Ontario N2L 3G1 Canada

抄録

<jats:title>Abstract</jats:title><jats:p>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 (<jats:italic>Φ</jats:italic><jats:sub>ECL</jats:sub>) 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 <jats:italic>Φ</jats:italic><jats:sub>ECL</jats:sub> 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.</jats:p>

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