Journal
DYES AND PIGMENTS
Volume 182, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2020.108686
Keywords
Dithienylethene; Difluoroboron beta-diketonate complexes; Tetraphenylethene; Triphenylethene; Fluorescent molecular photoswitches; Visible light
Funding
- National Natural Science Foundation of China [21702091]
- Luoyang Normal University [2017-PYJJ-005]
- Key Scientific Research Project of Higher Education of Henan Province [18A150012]
- Innovation and Entrepreneurship Training Program for College students in Henan Province [S201910482002, S201910482003]
- Key Research & Development Project of Shandong Province [2018GGX109014]
- Yantai Double Hundred Plan
- Talent Induction Program for Youth Innovation Teams in Colleges and Universities of Shandong Province
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Developing new visible light-triggered fluorescent molecular photoswitches is highly desirable for potential application in the fields of photoresponsive optoelectronics and photopharmacology. In this contribution, two novel tetra-/triphenylethene-dithienylethene-BF(2)bdk triads (TDB1 and TDB2) have been designed and prepared by appending tetra-/triphenylethene and BF(2)bdk moieties at the termini of dithienylethene unit. Before irradiation with blue light at 460-470 nm, they showed an intense emission in solution and in the PMMA film state, suggesting that the AIE effect of tetra-/triphenylethene was inhibited, and functioned only as electron-donating groups. Moreover, upon alternating irradiation with blue/NIR light, TDB1 and TDB2 displayed effective fluorescent switching behaviors and NIR photochromism in toluene and the PMMA film. Therefore, they would be utilized as novel visible light-triggered switches integrated in smart optoelectronic materials. The DFT calculations further validate the differences for their optical properties in the experiments.
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