Light-induced magnetic switching in a coumarin-based Tb single molecule magnet
Bartolomé, Elena ; Arauzo, Ana (Universidad de Zaragoza) ; Luzón, Javier ; Gasque, Laura
Resumen: We present the intriguing magneto-optical properties of the lanthanide complex [Tb(coum)3(batho)]·[0.7EtOH], named Tb–batho, based on coum = 3-acetyl-4-hydroxylato-coumarin and batho = bathophenanthroline ligands. Tb–batho displays visible-range luminescence with a notable quantum yield (58%) upon sensitization of the “antenna” ligands. Employing a SQUID magnetometer equipped with a magneto-optic option, we conducted comprehensive in situ measurements of light-induced magnetization changes across varied magnetic fields, temperatures, and frequencies, utilizing light wavelengths ranging from 275 to 800 nm. A reversible magnetic modulation of magnetization is observed upon toggling the light “on” and “off,” particularly pronounced at 380 nm excitation, resulting in a magnetization change ΔM(off/on) = 0.376μB fu−1 (ca. 42.6% of the magnetization) at 1.8 K and 1 kOe. Although Tb–batho exhibits field-induced single ion magnet (SIM) behavior, characterized by a thermally-activated process with an activation energy of Ueff/kB = 16.6 K @ 3 kOe and a slow direct process influenced by bottleneck effects, light irradiation does not noticeably alter its dynamic properties. All in all, Tb–batho emerges as a versatile multifunctional molecular material integrating SIM behavior, luminescence and light-induced magnetic switching, holding interest for diverse electronic applications, sensors, or quantum computing.
Idioma: Inglés
DOI: 10.1039/d4tc03152k
Año: 2025
Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 13, 2 (2025), 831-841
ISSN: 2050-7526
Financiación: info:eu-repo/grantAgreement/ES/AEI/CEX2023-001263-S
Financiación: info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138492NB-I00
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2025-01-10-14:25:35)
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Idioma: Inglés
DOI: 10.1039/d4tc03152k
Año: 2025
Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 13, 2 (2025), 831-841
ISSN: 2050-7526
Financiación: info:eu-repo/grantAgreement/ES/AEI/CEX2023-001263-S
Financiación: info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138492NB-I00
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2025-01-10-14:25:35)
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Record created 2025-01-10, last modified 2025-01-10