Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting

• 作者: Tifeng Xia Wenqian Cao Yuanjing Cui Yu Yang Guodong Qian
• 来源期刊: 光电进展（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: Original Article
• 页码范围: 8-15
• 页数: 8页
• 语种: 英文
• DOI: 10.29026/oea.2021.200063

摘要

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 in-formation 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 lu-minescence represented by both the tunable color from red to blue within the visible region and high sensitive responsiv-ity 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.