Cerium(III) and 5-methylisophthalate-based MOFs with slow relaxation of magnetization and photoluminescence emission

Two novel Ce(III) metal organic frameworks (MOFs) with formulas [Ce(5Meip)(H-5Meip)]n GR-MOF-17 and [CeCl(5Meip)(DMF)]n GR-MOF-18 (5Meip = 5-methylisophthalate, DMF = N,N-dimethylformamide) have been synthesized, forming 3-dimensional frameworks. Magnetic measurements show that both compounds presen...

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Detalles Bibliográficos
Autores: Pajuelo Corral, Oier, Contreras Morales, María del Carmen, Rojas, Sara, Choquesillo Lazarte, Duane, Seco Botana, José Manuel, Rodríguez Diéguez, Antonio, Salinas Castillo, Alfonso, Cepeda Ruiz, Javier, Zabala Lekuona, Andoni, Vitorica Yrezabal, Iñigo J.
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/70934
Acceso en línea:http://hdl.handle.net/10810/70934
Access Level:acceso abierto
Descripción
Sumario:Two novel Ce(III) metal organic frameworks (MOFs) with formulas [Ce(5Meip)(H-5Meip)]n GR-MOF-17 and [CeCl(5Meip)(DMF)]n GR-MOF-18 (5Meip = 5-methylisophthalate, DMF = N,N-dimethylformamide) have been synthesized, forming 3-dimensional frameworks. Magnetic measurements show that both compounds present field-induced slow magnetic relaxation under a small applied dc field. For GR-MOF-17, the temperature dependence of relaxation times is best described by a Raman mechanism, whereas for GR-MOF-18, relaxation occurs through a combination of Raman and local-mode pathways. Moreover, when avoiding short Ce⋯Ce interactions by magnetic dilution in GR-MOF-17@La and GR-MOF-18@La, only the local-mode mechanism is responsible for magnetic relaxation. Photophysical studies show the occurrence of ligand-centred luminescence in both compounds and phosphorescence emission at low temperature for GR-MOF-17.

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