Reversible Thermo/hydrochromic Luminescence in a Ln-MOF Film for Anticounterfeiting Application

ACS Applied Optical Materials Pub Date : 2025-03-14 DOI:10.1021/acsaom.5c0002910.1021/acsaom.5c00029

Xiaohe Wei, Fengjun Chun, Yaxin Cao, Xin Zhang, Jiangkun Chen, Zhifeng Xing, Yongzheng Fang* and Feng Wang*,

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引用次数: 0

Abstract

Stimuli-responsive luminescent materials have attracted much attention in anticounterfeiting applications due to their excellent optical encryption capabilities. Here, a dual-stimuli-responsive lanthanide metal–organic framework (Tb/Eu-MOF) film is presented to enrich luminescence response behaviors for advancing the security levels. The loss/gain of H₂O ligands under the stimulation of heat/moisture drives the reversible phase transformation of Ln-MOF films between two phases with distinct ionic distances. The shortening of the ionic distance upon heating facilitates Tb³⁺-to-Eu³⁺ energy transfer, leading to an emission color change from green to red. The opposite influence brought by moisture reverses the emission color back to green. We show that the color response of the Ln-MOF films can be deliberately controlled by rational design of the MOF structure and stimulation parameter for high-security anticounterfeiting applications.

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用于防伪的mn - mof薄膜的可逆热/水致变色发光

激发响应发光材料因其优异的光学加密性能而在防伪领域受到广泛关注。本文提出了一种双刺激响应的镧系金属-有机框架（Tb/Eu-MOF）薄膜，以丰富其发光响应行为，提高其安全水平。在热/湿刺激下，H2O配体的损失/增益驱动了不同离子距离的两相之间的可逆相变。加热时离子距离的缩短有利于Tb3+向eu3 +的能量转移，导致发射颜色由绿色变为红色。湿度带来的相反影响使发射色变回绿色。研究表明，通过合理设计MOF结构和激励参数，可以有效地控制Ln-MOF薄膜的颜色响应，从而实现高安全性防伪应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Optical Materials 材料科学-光学材料-

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.