期刊
ADVANCED OPTICAL MATERIALS
卷 10, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202200417
关键词
data encryption; excited state luminescence regulation; interfacial electron transfer; ultrafast spectroscopy; UV sensing
资金
- King Abdullah University of Science and Technology (KAUST)
This study successfully addresses the challenge of regulating the luminescence of organic chromophores using external stimuli. By expanding the utility of oleic acid, the authors have developed a new and efficient luminescent regulator that can precisely control the emission colors from different electronic excited states. The findings have important applications in light-conversion devices, UV-light detection, and data encryption.
It is extremely difficult if not impossible to effectively and precisely regulate the luminescence of organic chromophores from different electronic excited states through external stimuli for use in light-conversion devices. This is mainly due to the difficulty in breaking Kasha's rule by large energy separation and stabilization of different emissive electronic excited states. Here, the authors address this great challenge in a single experiment by expanding the utility of a monounsaturated omega-9 fatty acid (oleic acid) capped with organic chromophores as a new and efficient luminescent regulator. More specifically, the authors have successfully promoted the use of oleic acid as an efficient and reversible switch that can precisely regulate chromophore luminescence. These time-resolved absorption and luminescence experiments, along with density functional theory calculations have clearly demonstrated that ultrafast electron transfer from oleic acid to the difluoroboron beta-diketonate (DFBK) chromophores efficiently blocks the intramolecular charge transfer process of DFBK chromophores, and activates the locally excited state luminescence, leading to different emission colors from different electronic excited states for ultralow UV-light detection and high-performance data encryption.
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