Year
Month
(Peer-Reviewed) Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting
Tifeng Xia 夏体锋, Wenqian Cao, Yuanjing Cui 崔元靖, Yu Yang 杨雨, Guodong Qian 钱国栋
State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
中国 杭州 浙江大学材料科学与工程学院 硅材料国家重点实验室 唐仲英传感材料及应用研究中心
Opto-Electronic Advances, 2021-08-25
Abstract

The development of high-level anti-counterfeiting techniques is of great significance in economics and security issues. However, intricate reading methods are required to obtain multi-level information stored in different colors, which greatly limits the application of anti-counterfeiting technology on solving real world problems.

Herein, we realize multicolor information anti-counterfeiting under simply external stimulation by utilizing the functional groups and multiple emission centers of lanthanide metal organic framework (Ln-MOFs) to tune luminescence color. Water responsive multicolor luminescence represented by both the tunable color from red to blue within the visible region and high sensitive responsivity has been achieved, owing to the increased nonradiative decay pathways and enhanced Eu3+-to-ligand energy back transfer.

Remarkably, information hidden in different colors needs to be read with a specific water content, which can be used as an encryption key to ensure the security of the information for high-level anti-counterfeiting.
Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting_1
Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting_2
Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting_3
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