Redox-modulated near-infrared electrochromism, electroluminochromism, and aggregation-induced fluorescence change in an indolo[3,2-b]carbazole-bridged diamine system
| Autor: | Xiaoyan Wang, Shen-Zhen Guo, Jing Zhang, Guang-Ao Yu, Sheng Hua Liu, Zhao Chen, Yu-Bao Dong, Jun Yin |
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| Rok vydání: | 2017 |
| Předmět: |
Carbazole
Metals and Alloys Diphenylamine Quantum yield 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Fluorescence Redox 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Electrochromism Diamine Materials Chemistry Amine gas treating Electrical and Electronic Engineering 0210 nano-technology Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 246:570-577 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2017.02.114 |
| Popis: | A new indolo[3,2-b]carbazole-based compound (1) has been developed by linking two redox-active diphenylamine moieties to the rigid π-conjugated indolo[3,2-b]carbazole core. Its first two completely reversible oxidation steps are mainly related to the two terminal amine centers, and a moderate electron coupling between these amine centers has been determined. The associated oxidized species 1+ and 12+ both exhibited strong NIR absorptions, and a completely reversible conversion among three different colors (light-yellow, red, and blue, corresponding to neutral, monocationic and dicationic states, respectively) could be realized. In addition, reversible switching between turn-off and turn-on of its fluorescence could be accomplished by electrochemical oxidation and reduction, respectively. Compound 1 also exhibited obvious fluorescence color changes during its aggregate-forming process, and its solid showed bright-yellow fluorescence with a high emission quantum yield of 30%. |
| Databáze: | OpenAIRE |
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