One Stimulus In Situ Induces Two Sequential Luminescence Switchings in the Same Solvent-Fuming Process: Anthracene Excimer as the Intermediate
One Stimulus In Situ Induces Two Sequential Luminescence Switchings in the Same Solvent-Fuming Process: Anthracene Excimer as the Intermediate
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一种原位刺激在同一溶剂发烟过程中诱导两次连续的发光切换：蒽准分子作为中间体
DOI：
10.1002/adfm.201901895
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发表时间：
2019
影响因子：
19
通讯作者：
Yang Bing
中科院分区：
文献类型：
--
作者：
Liu Haichao;Shen Yue;Yan Yan;Zhou Changjiang;Zhang Shitong;Li Bao;Ye Ling;Yang Bing
在刺激响应实验中，一种刺激通常只引起一次发光开关。在本文中，据报道，一个刺激原位诱导两个发光开关，这是由溶剂发烟过程中的两个相变引起的。两个相变是由第一个快速和随后的缓慢过程组成的，对应于分子堆积从非晶态到π-π二聚体晶态再到共晶态的变化，伴随着从纯蓝色到绿色再到深蓝色的发光转变。理论和实验结果表明，蒽的π-π二聚体交错堆积是过渡两个相变的中间态。这一发现拓展了刺激响应领域的新视野，并激发了信息存储和安全领域的新应用。
Commonly, one stimulus only induces one luminescence switching in stimuli‐responsive experiment. Herein, it is reported that one stimulus in situ induces two luminescent switches, resulting from two phase transitions in a solvent‐fuming process. Two phase transitions are in situ composed of a first fast and a subsequent slow process, corresponding to the change of molecular packing from the amorphous state to the π–π dimer crystalline state to the cocrystalline state with the inclusion of solvents, accompanied with luminescent transformation from pure blue to green to deep blue. Theoretical and experimental results reveal that the staggered π–π dimer stacking of anthracenes serves as the intermediate state to bridge the two phase transitions. This finding expands a new horizon in the stimuli‐responsive field and inspires novel applications in information storage and security fields.