Volume 58, Issue 10 pp. 3162-3166
Communication

Aggregation-Induced Electrochemiluminescence of Carboranyl Carbazoles in Aqueous Media

Xing Wei

Xing Wei

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210023 China

These authors contributed equally to this work.

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Meng-Jiao Zhu

Meng-Jiao Zhu

State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, 210023 China

These authors contributed equally to this work.

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Zhe Cheng

Zhe Cheng

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210023 China

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Mengjeu Lee

Mengjeu Lee

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210023 China

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Prof. Dr. Hong Yan

Corresponding Author

Prof. Dr. Hong Yan

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210023 China

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Prof. Dr. Changsheng Lu

Corresponding Author

Prof. Dr. Changsheng Lu

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210023 China

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Prof. Dr. Jing-Juan Xu

Corresponding Author

Prof. Dr. Jing-Juan Xu

State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, 210023 China

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First published: 30 January 2019
Citations: 213

Graphical Abstract

Carborane-based AIEgens: The reductive–oxidative aggregation-induced electrochemiluminescence (AIECL) of carboranyl carbazoles in air-saturated aqueous media was investigated. Mechanistic studies indicate that the carboranyl motif plays vital role in the high ECL intensity and stability of the aggregates.

Abstract

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.

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