Redox-modulated near-infrared electrochromism, electroluminochromism, and aggregation-induced fluorescence change in an indolo[3,2-b]carbazole-bridged diamine system
Redox-modulated near-infrared electrochromism, electroluminochromism, and aggregation-induced fluorescence change in an indolo[3,2-b]carbazole-bridged diamine system
复制标题
吲哚并[3,2-b]咔唑桥二胺体系中氧化还原调节的近红外电致变色、电致发光和聚集诱导的荧光变化
DOI：
10.1016/j.snb.2017.02.114
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Liu Sheng-Hua
中科院分区：
文献类型：
--
作者：
Zhang Jing;Chen Zhao;Wang Xiao-Yan;Guo Shen-Zhen;Dong Yu-Sao;Yu Guang-Ao;Yin Jun;Liu Sheng-Hua
通过将两个具有氧化还原活性的二苯胺基团连接到刚性的π-共轭吲哚并[3，2-B]咔唑核上，开发了一种新的吲哚并[3，2-B]咔唑基化合物（1）。其前两个完全可逆的氧化步骤主要与两个末端胺中心有关，并且已经确定这些胺中心之间存在适度的电子耦合。1+和12+离子的近红外光谱都显示出很强的吸收，并且可以实现浅黄色、红色和蓝色（分别对应于中性、单阳离子和双阳离子态）之间的完全可逆转换。此外，其荧光的关闭和开启之间的可逆切换可以分别通过电化学氧化和还原来实现。化合物1在聚集体形成过程中也表现出明显的荧光颜色变化，其固体呈现亮黄色荧光，发射量子产率高达30%。
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 species1+and12+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. Compound1also 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%.