Aggregation-induced emission in fluorophores containing a hydrazone structure and a central sulfone: restricted molecular rotation

作者：Li, Jing; Yang, Wen; Zhou, Weiqun^*; Li, Chunchun; Cheng, Zhongqing; Li, Mengying; Xie, Liqun; Li, Youyong

来源：RSC Advances, 2016, 6(42): 35833-35841.

DOI：10.1039/c6ra02209j

• DENSITY-FUNCTIONAL THERMOCHEMISTRY
• FLUORESCENCE
• OLEDS
• ELECTROLUMINESCENCE
• PHOSPHORESCENCE
• NANOPARTICLES
• MECHANISM
• BASE

Four D-pi-A-pi-D structured 4,4'-di(E)-2-(4-4-alkoxyaniline) hydrazinyldiphenyl sulfones were synthesized and their structures were characterized using NMR, IR, and element analysis. These compounds displayed weak fluorescence emission in THF while their fluorescence was enhanced in a THF/water mixture solvent. Fluorescence microscope imaging showed the formation of the aggregate state. The mechanism of aggregation-induced emission (AIE) was supported by molecular dynamics calculations. The intermolecular hydrogen bonds between adjacent molecules inhibited the intramolecular rotations, preventing pi-pi stacking and causing AIE enhancement. Living cell imaging experiments opened up a new method for cell fluorescence staining.

• 出版日期2016
• 单位苏州大学