Wu Fangwei, Xia Zengyan, Sun Dongdong, Huang Xin, Hu Xianchen, Wu Yong, Wang Yanmei, Pei Mengqi, Han Xie, Liu Simin
School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
J Org Chem. 2024 Oct 18;89(20):14898-14907. doi: 10.1021/acs.joc.4c01656. Epub 2024 Oct 2.
Photoresponsive multicolor luminescent systems offer interesting functions, which have led to applications in anticounterfeiting and biological imaging. However, expanding the color range of these materials remains a challenging task. Herein, a carbazole-modified dithienylethene derivative () that exhibits modulated fluorescence color changes through the photocyclization reaction and photolysis reaction is synthesized. emits orange fluorescence, and it can release a fluorophore which emits blue fluorescence by the photolysis reaction, resulting in the color change. Upon complexation of with cucurbit[10]uril (CB[10]), the fluorescence wavelength will have a blue shift and the photolysis reaction will be inhibited. Benefiting from the influence of CB[10] and the photolysis reaction of free guests, the color range of the photoresponsive system which is composed of free guests and host-guest complexes is further extended. White light emission along with a color shift from yellow-green to blue was achieved by adjusting the ratio of free guests to host-guest complexes. Finally, the photoresponsive multicolor systems are utilized to construct a photostimulated PVA film and an information encryption system. This work provides an alternative strategy for the preparing of photoresponsive multicolor luminescent system and modulation of its color range.
光响应多色发光系统具有有趣的功能，已在防伪和生物成像领域得到应用。然而，扩大这些材料的颜色范围仍然是一项具有挑战性的任务。在此，合成了一种咔唑修饰的二噻吩乙烯衍生物（），它通过光环化反应和光解反应表现出调制的荧光颜色变化。发射橙色荧光，并且通过光解反应可以释放出发射蓝色荧光的荧光团，从而导致颜色变化。当与葫芦[10]脲（CB[10]）络合时，荧光波长将发生蓝移，并且光解反应将受到抑制。受益于CB[10]的影响和游离客体的光解反应，由游离客体和主客体络合物组成的光响应系统的颜色范围进一步扩大。通过调节游离客体与主客体络合物的比例，实现了从黄绿色到蓝色的颜色变化以及白光发射。最后，利用光响应多色系统构建了光刺激的聚乙烯醇薄膜和信息加密系统。这项工作为制备光响应多色发光系统及其颜色范围的调制提供了一种替代策略。
