Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 10, Issue 15, Pages 6036-6042Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2tc00073c
Keywords
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Funding
- Program of Innovative Talent (in Science and Technology) in the University of Henan Province [21HASTIT007]
- Youth Backbone Teacher Training Project of Henan Province [2020GGJS213]
- Key Scientific and Technological Project of Henan Province [212102210034]
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This study successfully synthesized a hybrid material that can control luminescence through light stimuli, achieving the switching of luminescence of Eu3+ ions between ON and OFF states through repeated cycles of UV and visible light irradiation. This opens the possibility of developing lanthanide-based photoswitches for optical anti-counterfeiting and data storage.
Reversible modulation of the luminescence properties of Ln(3+) ions has found many applications in the fields of biology, information and chemistry. However, it is still a challenge to efficiently remote control the luminescence of Ln(3+) by light stimuli. In this paper, light-controlled luminescence ON-OFF switchable hybrid materials are successfully synthesized by loading Eu3+ complexes and photochromic diarylethenes (DAEs) into monodisperse mesoporous silica nanospheres (MSNs). Repeated cycles of UV and visible light irradiation switch the DAEs between closed-form and open-form isomers, where the closed-form DAEs (CF-DAEs) and Eu3+ complexes undergo Forster resonance energy transfer (FRET) due to the spectral overlap between the emission band of Eu3+ complexes and the absorbance band of CF-DAEs. Therefore, the luminescence of Eu3+ ions was repeatedly switched between ON and OFF states after successive UV and visible irradiation of the hybrid materials. This study opens the possibility of developing lanthanide-based photoswitches for optical anti-counterfeiting and data storage.
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