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Aggregation‐Induced Electrochemiluminescence of Carboranyl Carbazoles in Aqueous Media
Author(s) -
Wei Xing,
Zhu MengJiao,
Cheng Zhe,
Lee Mengjeu,
Yan Hong,
Lu Changsheng,
Xu JingJuan
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201900283
Subject(s) - electrochemiluminescence , chemistry , cyclic voltammetry , excited state , photochemistry , aqueous solution , combinatorial chemistry , electrochemistry , organic chemistry , electrode , physics , nuclear physics
The aggregation‐induced electrochemiluminescence (AIECL) of carboranyl carbazoles in aqueous media was investigated for the first time. Quantum yields, morphologies, and particle sizes were observed to determine the electrochemiluminescence (ECL) performance of these aggregated organic dots (ODs). All compounds exhibit much higher ECL stability and intensity than the carborane‐free compound, demonstrating the essential role of the carboranyl motif. Moreover, the results of cyclic voltammetry (CV) suggest that oxidation/reduction reactions take place at the carboranyl motif. The excited states of ODs were proposed to be generated by the mechanism of surface state transitions. More importantly, these compounds show a reductive–oxidative mechanism in contrast to other organic materials that show oxidative–reductive mechanisms. Our experiments and data have established the relation between AIE organic structures and ECL properties that has a strong potential for biological and diagnostic applications.