Liu Yong, Niu Jie, Wang Weishan, Dong Baoli, Lin Weiying
Institute of Fluorescent Probes for Biological Imaging, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, University of Jinan, Shandong 250022, P. R. China.
J Mater Chem B. 2017 Oct 14;5(38):7801-7808. doi: 10.1039/c7tb02148h. Epub 2017 Sep 18.
Very recently, aggregation-induced emission (AIE) and two-photon (TP) emission materials have attracted great attention owing to their widespread applications. Herein, interestingly, we described a unique single fluorophore core with different substituents that can show either outstanding AIE or TP fluorescence properties. The introduction of an electron donating unit such as a tertiary amine group on the phenanthrenequinone imidazole core afforded a novel AIE-based fluorescent material PIN. The optical studies of PIN revealed that appropriate structural modifications on the phenanthrenequinone imidazole core could result in AIE character. On the other hand, modification of an electron-withdrawing moiety such as an indolium moiety on the same phenanthrenequinone imidazole-core provided a new material PID, which exhibited favorable TP emission, indicating that phenanthrenequinone imidazole derivatives could be exploited as TP materials. Furthermore, we have demonstrated that the novel AIE or TP materials constructed herein can be successfully applied for sensing targets of interest in aqueous and biological settings owing to their highly desirable emission profiles. The intriguing finding that careful modification of the phenanthrenequinone imidazole scaffold could afford excellent AIE or TP materials may open a new avenue to engineer robust materials with diverse properties based on a versatile core for various applications.
最近，聚集诱导发光（AIE）和双光子（TP）发光材料因其广泛的应用而备受关注。有趣的是，在此我们描述了一种具有不同取代基的独特单荧光团核心，其可以表现出出色的AIE或TP荧光特性。在菲醌咪唑核心上引入给电子单元如叔胺基团，得到了一种新型的基于AIE的荧光材料PIN。对PIN的光学研究表明，在菲醌咪唑核心上进行适当的结构修饰可导致AIE特性。另一方面，在同一菲醌咪唑核心上修饰吸电子部分如吲哚鎓部分，得到了一种新材料PID，其表现出良好的TP发射，表明菲醌咪唑衍生物可被开发为TP材料。此外，我们已经证明，本文构建的新型AIE或TP材料由于其非常理想的发射特性，可以成功应用于水性和生物环境中感兴趣的传感目标。菲醌咪唑支架经仔细修饰可得到优异的AIE或TP材料这一有趣发现，可能为基于通用核心设计具有多种特性的坚固材料以用于各种应用开辟一条新途径。
