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
复制标题
DOI：
10.1021/jp401440s
复制
发表时间：
2013-05-30
影响因子：
3.7
通讯作者：
Park, Soo Young
中科院分区：
文献类型：
--
作者：
Chung, Jong Won;Yoon, Seong-Jun;Park, Soo Young
π共轭分子的荧光切换或调制由于其有前景的应用而在光电材料科学和技术领域引起了极大的兴趣。然而，通常与固态的常规π共轭分子相关的“浓度荧光猝灭”问题有时成为在高对比度存储器存储装置中使用π共轭分子的障碍。我们设计了一个.合成了一类新型荧光开关π共轭分子，(Z)-CN-MBE，表现出可逆的光/热E/Z异构化过程，并伴随着固态下显着的荧光开/关开关。这可能为构建高对比度光学二进制存储器存储设备提供一种有前景的方法。 (Z)-CN-MBE 实际上是非荧光的，但即使在固态下，在外部光/热刺激下也会表现出非凡的 Z 到 E 异构化，并且由于其反式异构体独特的“聚集诱导增强发射”(AIEE) 现象，伴随着剧烈的荧光增强。
Fluorescence switching or modulation of pi-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 pi-conjugated molecules in the solid state were occasionally an obstacle to use of pi-conjugated molecules in high-contrast memory storage devices. We designed an. synthesized a novel class of fluorescence switching pi-conjugated molecule, (Z)-CN-MBE, 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 unique "aggregation-induced enhanced emission" (AIEE) phenomenon of its trans isomer.