Transient and Persistent Room‐Temperature Mechanoluminescence from a White‐Light‐Emitting AIEgen with Tricolor Emission Switching Triggered by Light |
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| Authors: | Jian‐An Li Jinghong Zhou Dr Zhu Mao Dr Zongliang Xie Dr Zhan Yang Prof Bingjia Xu Prof Cong Liu Xin Chen Dingyang Ren Hui Pan Prof Guang Shi Prof Yi Zhang Prof Zhenguo Chi |
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| Affiliation: | 1. Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, School of Chemistry and Environment, South China Normal University, Guangzhou, China;2. School of Chemistry, Sun Yat-sen University, Guangzhou, China |
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| Abstract: | Persistent luminescence from purely organic materials is basically triggered by light and electricity, which largely confines its practical applications. A purely organic AIEgen exhibits not only persistent photoluminescence, but also transient and persistent room‐temperature mechanoluminescence. By simply turning on and off a UV lamp, tricolor emission switching between blue, white, and yellow was achieved. The data from single‐crystal structure analysis and theoretical calculation suggest that mechanism of the observed persistent mechanoluminescence (pML) is correlated with the strong spin–orbit coupling of the bromine atom, as well as the formation of H‐aggregates and restriction of intramolecular motions in noncentrosymmetric crystal structure. These results outline a fundamental principle for the development of new pML materials, providing an important step forward in expanding the application scope of persistent luminescence. |
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| Keywords: | aggregation-induced emission persistent mechanoluminescence phosphorescence white-light emission |
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