期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 37, 页码 16054-16060出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202003585
关键词
Color tunable; host-guest systems; anti-counterfeiting; security inks; room-temperature phosphorescence
资金
- National Natural Scientific Foundation of China [51803009, 21975021, 51673024, 51328302, 21404010]
- Beijing Institute of Technology Research Fund Program for Young Scholars
Organic materials with long-lived, color-tunable phosphorescence are potentially useful for optical recording, anti-counterfeiting, and bioimaging. Herein, we develop a series of novel host-guest organic phosphors allowing dynamic color tuning from the cyan (502 nm) to orange red (608 nm). Guest materials are employed to tune the phosphorescent color, while the host materials interact with the guest to activate the phosphorescence emission. These organic phosphors have an ultra-long lifetime of 0.7 s and a maximum phosphorescence efficiency of 18.2 %. Although color-tunable inks have already been developed using visible dyes, solution-processed security inks that are temperature dependent and display time-resolved printed images are unprecedented. This strategy can provide a crucial step towards the next-generation of security technologies for information handling.
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