期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 21, 页码 6901-6905出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201900115
关键词
aqueous solubility; Au nanoclusters; electrochemiluminescence; host-guest recognition; monochromatic electrochemiluminophores
资金
- National Natural Science Foundation of China [21427808]
- Fundamental Research Funds of Shandong University [2018JC017]
Inspired by the enhanced photoluminescence of Au nanoclusters (AuNCs) with a rigid shell, the formation of rigid host-guest assemblies on AuNC surfaces was employed to screen novel electrochemiluminophores with 6-aza-2-thiothymine(ATT)-protected AuNCs (ATT-AuNCs) and l-arginine (ARG) as models for the first time. The rigid host-guest assemblies formed between ARG and ATT on the ATT-AuNC surface enabled aqueous-soluble ARG/ATT-AuNCs with a dramatically enhanced electrochemiluminescence (ECL) compared to ATT-AuNCs. This includes one cathodic ECL process (-1.30V) and three anodic ECL processes (+0.78, 0.90, and 1.05V) in a so-called half-scan experiment without a co-reactant, as well as a 70-fold enhanced oxidative-reduction ECL at +0.78V with tri-n-propylamine as a co-reactant. Importantly, the ECL of the ARG/ATT-AuNCs is highly monochromatic with an emission maximum around 532nm and a full width at half-maximum of 36nm, which is of great interest for color-selective ECL assays.
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