Water-stable carborane-based Eu3+/Tb3+metal-organic frameworks for tunable time-dependent emission color and their application in anticounterfeiting bar-coding
Li, Zhen (Institut de Ciència de Materials de Barcelona)
Núñez, Rosario (Institut de Ciència de Materials de Barcelona)
Light, Mark E. (University of Southampton. Department of Chemistry)
Ruiz, Eliseo (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Teixidor, Francesc (Institut de Ciència de Materials de Barcelona)
Viñas, Clara (Institut de Ciència de Materials de Barcelona)
Ruiz-Molina, Daniel (Institut Català de Nanociència i Nanotecnologia)
Roscini, Claudio (Institut Català de Nanociència i Nanotecnologia)
Giner Planas, José (Institut de Ciència de Materials de Barcelona)

Date:	2022
Abstract:	Luminescent lanthanide metal-organic frameworks (Ln-MOFs) have been shown to exhibit relevant optical properties of interest for practical applications, though their implementation still remains a challenge. To be suitable for practical applications, Ln-MOFs must be not only water stable but also printable, easy to prepare, and produced in high yields. Herein, we design and synthesize a series of mCB-EuyTb1-y (y = 0-1) MOFs using a highly hydrophobic ligand mCBL1: 1,7-di(4-carboxyphenyl)-1,7-dicarba-closo-dodecaborane. The new materials are stable in water and at high temperature. Tunable emission from green to red, energy transfer (ET) from Tb3+ to Eu3+, and time-dependent emission of the series of mixed-metal mCB-EuyTb1-y MOFs are reported. An outstanding increase in the quantum yield (QY) of 239% of mCB-Eu (20. 5%) in the mixed mCB-Eu0. 1Tb0. 9 (69. 2%) is achieved, along with an increased and tunable lifetime luminescence (from about 0. 5 to 10 000 μs), all of these promoted by a highly effective ET process. The observed time-dependent emission (and color), in addition to the high QY, provides a simple method for designing high-security anticounterfeiting materials. We report a convenient method to prepare mixed-metal Eu/Tb coordination polymers (CPs) that are printable from water inks for potential applications, among which anticounterfeiting and bar-coding have been selected as a proof-of-concept.
Grants:	Agencia Estatal de Investigación PID2019-106832RB-I00 Agencia Estatal de Investigación CEX2019-000917-S Agencia Estatal de Investigación RTI2018-098027-B-C21 Ministerio de Ciencia e Innovación MDM-2017-0767 Ministerio de Ciencia e Innovación SEV-2017-0706 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1720 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1289
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Anti-counterfeiting ; Bar coding ; Carboranes ; Emission color ; Higher yield ; Hydrophobic ligand ; Metalorganic frameworks (MOFs) ; Mixed-metals ; Time dependent ; Tunables
Published in:	Chemistry of materials, Vol. 34, issue 10 (May 2022) , p. 4795−4808, ISSN 1520-5002

DOI: 10.1021/acs.chemmater.2c00323
PMID: 35637791

14 p, 10.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles