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Dual Enhancement of Gold Nanocluster Electrochemiluminescence: Electrocatalytic Excitation and Aggregation-Induced Emission.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-11-05 , DOI: 10.1002/anie.201913445
Huaping Peng 1 , Zhongnan Huang 1 , Haohua Deng 1 , Weihua Wu 1 , Kaiyuan Huang 1 , Zhenglian Li 1 , Wei Chen 1 , Juewen Liu 2
Affiliation  

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 (Φ ECL) 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 Φ ECL 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.

中文翻译:

金纳米簇电化学发光的双重增强:电催化激发和聚集诱导的发射。

配体保护的金纳米簇(AuNCs)已成为一类新的电致化学发光的发光(ECL)的发光体为他们的有趣催化和发射特性,尽管它们的量子产率(Φ ECL在水性介质中)是低用ECL处理的不良机械理解。现在表明,在电极上干燥AuNCs可以通过电催化作用增强电化学激发,还可以通过三乙胺(TEA)作为六氮杂-2-硫代胸腺嘧啶(ATT)保护的AuNCs的聚集诱导ECL(AIECL)增强发射。共反应剂。将干燥的ATT-AuNCs / TEA系统产生了具有高度稳定的视觉ECL Φ ECL甲硫氨酸封端的AuNCs达到了78%的相似度,并且也获得了类似的增强。具有干燥功能的双重增强机制解决了AuNC ECL探针的机械难题,并可以指导ECL发射器的进一步合理设计。
更新日期:2019-11-05
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