High-Contrast On/Off Fluorescence Switching via Reversible E−Z Isomerization of Diphenylstilbene Containing the α‑Cyanostilbenic Moiety
High-Contrast On/Off Fluorescence Switching via Reversible E−Z Isomerization of Diphenylstilbene Containing the α‑Cyanostilbenic Moiety
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DOI：
10.1021/acs.jpcc.7b10301
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发表时间：
2013-05
影响因子：
3.7
通讯作者：
Jong Won Chung;Seong‐Jun Yoon;B. An;Soo Young Park
中科院分区：
文献类型：
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作者：
Jong Won Chung;Seong‐Jun Yoon;B. An;Soo Young Park
π共轭分子的荧光开关或荧光调制因其良好的应用前景而成为光电材料科学与技术领域的研究热点。然而，通常与固态中的常规π-共轭分子相关的“浓度荧光猝灭”问题偶尔是在高对比度存储器存储装置中使用π-共轭分子的障碍。我们设计并合成了一类新型的荧光开关π共轭分子（Z）-CN-MBE，它具有可逆的光/热E/Z异构化过程，在固态下伴随着显著的荧光开关。这可能提供一个有前途的方式来构建高对比度的光学二进制存储器存储设备。（Z）-CN-MBE几乎是无荧光的，但在外界光/热刺激下，即使在固态下也表现出非凡的Z至E异构化，并伴随着由于独特的“聚集诱导”而引起的剧烈荧光增强。
Fluorescence switching or modulation of π-conjugated molecules is of great interest in the area of optoelectronic materials science and technology because of their promising applications. However, the “concentration fluorescence quenching” problems commonly associated with conventional π-conjugated molecules in the solid state were occasionally an obstacle to use of π-conjugated molecules in high-contrast memory storage devices. We designed and synthesized a novel class of fluorescence switching π-conjugated molecule, (Z)-CN-MBE, that exhibits a reversible photo/thermal E/Z isomerization process, accompanied by a remarkable fluorescence on/off switching in the solid state. This may provide a promising way to construct high-contrast optical binary memory storage devices. (Z)-CN-MBE is virtually nonfluorescent but exhibits an extraordinary Z to E isomerization upon external light/thermal stimuli even in the solid state with a concomitant drastic fluorescence enhancement owing to the unique “aggregation-indu...