Wei Jun-Hua, Ou Wei-Tao, Luo Jian-Bin, Kuang Dai-Bin
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
Angew Chem Int Ed Engl. 2022 Aug 15;61(33):e202207985. doi: 10.1002/anie.202207985. Epub 2022 Jul 8.
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 (Cl Br ) (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.
尽管基于荧光标记的防伪技术以其成本效益高和信息承载能力大而脱颖而出，但空间分辨防伪的可克隆解密过程无法满足高安全级防伪的要求。在此，我们展示了一种基于新型有机-无机杂化卤化物BAPPZn(Cl Br)(BAPP = 1,4-双(3-氨丙基)哌嗪鎓，y = 0-1)的具有超长室温磷光(RTP)的空间-时间双分辨防伪系统。值得注意的是，通过调节卤化物诱导的重原子效应可以轻松调节余辉寿命，并且可以通过肉眼或借助简单的机器视觉系统进行识别。因此，短寿命的单色荧光和持续时间可调的RTP为单色时间分辨防伪提供了前提条件，降低了解密设备要求，并进一步提供了先进便携式防伪技术的设计策略。
