AUTHOR=Zhang Haining , Hu Xiaoxiao , Zhu Huijuan , Shen Limin , Liu Congmin , Zhang Xiaoman , Gao Xinyu , Li Lingmei , Zhu Yan-Ping , Li Ziyong 

TITLE=A Solid-State Fluorescence Switch Based on Triphenylethene-Functionalized Dithienylethene With Aggregation-Induced Emission

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.665880

DOI=10.3389/fchem.2021.665880

ISSN=2296-2646

ABSTRACT=The development of novel dithienylethene based fluorescence switches in the aggregated state and solid state is highly desirable for potential application in the fields of optoelectronics and photopharmacology. In this contribution, three novel triphenylethene-functionalized dithienylethenes (1-3) have been designed and prepared by appending triphenylethene moieties at one end of dithienylethene unit. Their chemical structures are confirmed by 1H NMR, 13C NMR and HRMS (ESI). They display good photochromic behaviors with excellent fatigue resistance upon irradiation with UV or visible light in THF solution. Before irradiation with UV light, they exhibit AIE properties and luminescence behaviors in the solid state. Moreover, upon alternating irradiation with UV/visible light, they display effective fluorescent switching behaviors in the aggregated state and solid state. The experimental results have been validated by the DFT calculations. Thus, they can be utilized as novel fluorescence switches integrated in smart solid-state optoelectronic materials and photopharmacology.