Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 33, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202207985
Keywords
Afterglow; Anti-Counterfeiting; Halide Engineering; Lead-Free Metal Halide; Room-Temperature Phosphorescence
Categories
Funding
- Natural Science Foundation of China [U2001214]
- NSF of Guangdong Province [2019B1515120050]
- GDUPS
- Fundamental Research Funds for the Central Universities
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Researchers have demonstrated a spatial-time-dual-resolved anti-counterfeiting system based on a new organic-inorganic hybrid halide. By regulating the halide-induced heavy-atom effect, the afterglow lifetime can be adjusted and can be identified by the naked eyes or with the help of a simple machine vision system. This provides the potential for high-security-level anti-counterfeiting through unicolor-time-resolved detection.
Though fluorescence-tag-based anti-counterfeiting technology has distinguished itself with cost-effective features and huge information loading capacity, the clonable decryption process of spatial-resolved anti-counterfeiting cannot meet the requirements for high-security-level anti-counterfeiting. Herein, we demonstrate a spatial-time-dual-resolved anti-counterfeiting system based on new organic-inorganic hybrid halides BAPPZn(2)(ClyBr1-y)(8) (BAPP = 1,4-bis (3-ammoniopropyl)piperazinium, y = 0-1) with ultra-long room-temperature phosphorescence (RTP). Remarkably, the afterglow lifetime can be facilely tuned by regulating the halide-induced heavy-atom effect and can be identified by the naked eyes or with the help of a simple machine vision system. Therefore, the short-lived unicolor fluorescence and lasting-time-tunable RTP provide the prerequisites for unicolor-time-resolved anti-counterfeiting, which lowers the decryption-device requirements and further provides the design strategy of advanced portable anti-counterfeiting technology.
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