Issue 20, 2024

Transition metal and lanthanide modified MOF-808 for barcode design

Abstract

This study explores the utilization of metal–organic frameworks (MOFs), particularly those incorporating lanthanide-based elements for their fluorescence capabilities, to create an advanced barcode system. By exploiting the modular nature of MOFs, we have developed a material capable of dynamic information encoding and robust against counterfeiting efforts. We introduce a novel barcode prototype that exhibits visible color shifts and fluorescence modulation when exposed to a specific sequence of chemical and thermal stimuli. The barcode is composed of MOF-808, which is modified with transition metals like iron or cobalt, and europium cations. These components are embedded within polyvinylidene fluoride (PVDF) to form a composite. This embedding process ensures that the MOF particles remain reactive to specific trigger molecules, enabling a distinct read-out sequence. The decoding process, involving exposure to ammonia, heating at 120 °C, and treatment with HCl, triggers observable changes in fluorescence and color, depending on the transition metal used. Our investigations with Eu,Co-MOF-808, and Eu,Fe-MOF-808 composites have resulted in the creation of a barcode prototype that demonstrates the feasibility of using europium-modified and unmodified transition metal modified MOF-808@PVDF composites for enhanced security applications.

Graphical abstract: Transition metal and lanthanide modified MOF-808 for barcode design

Supplementary files

Article information

Article type
Paper
Submitted
20 Feb 2024
Accepted
24 Apr 2024
First published
25 Apr 2024
This article is Open Access
Creative Commons BY license

Dalton Trans., 2024,53, 8608-8618

Transition metal and lanthanide modified MOF-808 for barcode design

N. Marquardt, F. von der Haar and A. Schaate, Dalton Trans., 2024, 53, 8608 DOI: 10.1039/D4DT00501E

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