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Title

Dilution effect on the slow relaxation of a luminescent dysprosium Metal-Organic Framework based on 2,5-dihydroxyterephthalic acid

AuthorsGarcía-Valdivia, A.A.; Zabala-Lekuona, A.; Goñi-Cárdenas, A.; Fernández, Belén; García, J.A.; Quílez del Moral, J.F.; Cepeda, J.; Rodríguez-Diéguez, A.
Issue Date2020
PublisherElsevier BV
CitationInorganica Chimica Acta 509 (2020)
AbstractA new dysprosium based Metal-Organic Framework with {[Dy(dhbdc)(DMF)]·DMF} formula has been obtained from solvothermal reaction with 2,5-dihydroxyterephthalic acid ligand and dysprosium chloride. This coordination polymer has been characterized and its crystal structure has been solved by X-ray diffraction methods elucidating a three-dimensional network. Magnetic studies of this compound reveal the existence of weak antiferromagnetic interactions among the metal ions with θ value of −0.26 K. Dynamic ac magnetic susceptibility measurements were carried out under an external dc field of 1 kOe, highlighting that at high frequencies two relaxation processes can be observed. However, when studying the diamagnetically diluted analogue 1, a single relaxation process was detected highlighting the effect of the weak but not negligible exchange interactions. Finally, photoluminescence measurements were performed at different temperatures with the aim of getting a more representative characterization of the emissive performance of the material for potential applications in lighting and thermometry.
Publisher version (URL)http://dx.doi.org/10.1016/j.ica.2020.119687
URIhttp://hdl.handle.net/10261/216149
Identifiersdoi: 10.1016/j.ica.2020.119687
issn: 0020-1693
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