| 一个苯并咪唑衍生物的基于晶态-晶态转变的余辉刺激响应行为 |
| Afterglow stimulation response behaviors of a benzimidazole derivative based on crystalline-to-crystalline transition |
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| 摘要: 通过苯并咪唑-5，6-二羧酸和间氨基苯磺酸的缩合得到有机物3-(5，7-dioxoimidazo[4，5-f]isoindol-6(1H，5H，7H)-yl) benzenesulfonic acid (DIBS)，进而通过在不同温度下重结晶获得2种固态相： DIBS (10℃)和DIBS (60℃)。DIBS (10℃)具有寿命为721.55 ms的绿色室温磷光，而DIBS (60℃)的黄绿色余辉由寿命分别为259.78和336.33 ms的延迟荧光和室温磷光组成。2种相的不同发光行为可归因于DIBS分子在2种相中不同的构型及堆积结构。有趣的是，在研磨或加热刺激下，DIBS (10℃)可转变为DIBS (60℃)，显示出罕见的余辉刺激响应行为。 |
| 关键词: 室温磷光 延迟荧光 机械变色发光 热致变色发光 分子堆积 |
| 基金项目: 国家自然科学基金(No.21871038)资助。 |
| Abstract: A new organic compound 3-(5, 7-dioxoimidazo[4, 5 -f]isoindol-6(1H, 5H, 7H)-yl) benzenesulfonic acid (DIBS) was synthesized by condensation of benzimidazo-5,6-dicarboxylic acid and m-aminobenzene sulfonic acid. Then two solid phases, DIBS(10℃) and DIBS(60℃), were obtained by recrystallization at different temperatures. DIBS(10℃) had green room temperature phosphorescence with a lifetime of 721.6 ms, while the yellow-green after-glow of DIBS(60℃) consisted of delayed fluorescence and room temperature phosphorescence with lifetimes of 259.8 and 336.3 ms, respectively. The different luminescence behaviors of the two phases can be attributed to the different conformations and stacking structures of DIBS molecules in the two phases. Interestingly, DIBS(10℃) could be transformed into DIBS(60℃) under grinding or heating stimulation, showing rare afterglow stimulus-response behavior. |
| Keywords: room temperature phosphorescence delayed fluorescence mechanochromic luminescence thermochromic luminescence molecular packing |
| 投稿时间：2023-03-07 修订日期：2023-05-06 |
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| 王会玉,刘淑芹,冯珂新,张建军.一个苯并咪唑衍生物的基于晶态-晶态转变的余辉刺激响应行为[J].无机化学学报,2023,39(8):1571-1578. |
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