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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/197627
Water-Stable Carborane-Based Eu3+/Tb3+ Metal−Organic Frameworks for Tunable Time-Dependent Emission Color and Their Application in Anticounterfeiting Bar-Coding
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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.
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LI, Zhen, NUÑEZ, Rosario, LIGHT, Mark e., RUIZ SABÍN, Eliseo, TEIXIDOR, Francesc, VIÑAS, Clara, RUIZ-MOLINA, Daniel, ROSCINI, Claudio, GINER PLANAS, José. Water-Stable Carborane-Based Eu3+/Tb3+ Metal−Organic Frameworks for Tunable Time-Dependent Emission Color and Their Application in Anticounterfeiting Bar-Coding. _Chemistry of Materials_. 2022. Vol. 34, núm. 2, pàgs. 4795-4808. [consulta: 23 de gener de 2026]. ISSN: 0897-4756. [Disponible a: https://hdl.handle.net/2445/197627]