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Reversible Tuning of Luminescence and Magnetism in a Structurally Flexible Erbium-Anilato MOF

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Reversible Tuning of Luminescence and Magnetism in a Structurally Flexible Erbium-Anilato MOF

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dc.contributor.author	Monni, Noemi
dc.contributor.author	Baldoví, José J.
dc.contributor.author	García López, Víctor
dc.contributor.author	Oggianu, Mariangela
dc.contributor.author	Cadoni, Enzo
dc.contributor.author	Quochi, Francesco
dc.contributor.author	Clemente León, Miguel
dc.contributor.author	Mercuri, Maria Laura
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2022-07-27T08:20:05Z
dc.date.available	2022-07-27T08:20:05Z
dc.date.issued	2022
dc.identifier.citation	Monni, Noemi Baldoví, José J. García-López, Víctor Oggianu, Mariangela Cadoni, Enzo Quochi, Francesco Clemente Leon, Miguel Mercuri, María Laura Coronado Miralles, Eugenio 2022 Reversible Tuning of Luminescence and Magnetism in a Structurally Flexible Erbium-Anilato MOF Chemical Science 13 7419 7428
dc.identifier.uri	https://hdl.handle.net/10550/83530
dc.description.abstract	By combining 3,6-N-ditriazolyl-2,5-dihydroxy-1,4-benzoquinone (H2trz2An) with NIR-emitting ErIII ion, two different 3D neutral polymorphic frameworks (1a and 1b), differing for the number of uncoordinated water molecules, formulated as [Er2(trz2An)3(H2O)4]n·xH2O (x = 10, a; x = 7, b), have been obtained. The structure of 1a shows layers with (6,3) topology forming six-membered rings with distorted hexagonal cavities along the bc plane. These 2D layers are interconnected through the N4 atoms of the two pendant arms of the trz2An linkers, leading to a 3D framework, where neighboring layers are eclipsed along the a axis, with hexagonal channels filled with water molecules. In 1b, layers with (6,3) topology in the [101] plane are present, each ErIII ion being connected to three other ErIII ions through bis-bidentate trz2An linkers, forming rectangular six-membered cavities. 1a and 1b are multifunctional materials showing coexistence of NIR emission and fieldinduced slow relaxation of the magnetization. Remarkably, 1a is a flexible MOF, showing a reversible structural phase transition involving shrinkage/expansion from a distorted hexagonal 2D framework to a distorted 3,6-brickwall rectangular 3D structure in [Er2(trz2An)3(H2O)2]n·2H2O (1a_des). This transition is triggered by a dehydration/hydration process under mild conditions (vacuum/heating to 360 K). The partially dehydrated compound shows a sizeable change in the emission properties and an improvement of the magnetic blocking temperature with respect to the hydrated compound, mainly related to the loss of one water coordination molecule. Theoretical calculations support experimental findings, indicating that the slight improvement observed in the magnetic properties has its origin in the change of ligand field around the ErIII ion due to the loss of a water molecule.
dc.language.iso	eng
dc.relation.ispartof	Chemical Science, 2022, vol. 13, p. 7419-7428
dc.subject	Física
dc.subject	Química
dc.subject	Nanotecnologia
dc.title	Reversible Tuning of Luminescence and Magnetism in a Structurally Flexible Erbium-Anilato MOF
dc.type	journal article	es_ES
dc.date.updated	2022-07-27T08:20:06Z
dc.identifier.doi	10.1039/D2SC00769J
dc.identifier.idgrec	153105
dc.rights.accessRights	open access	es_ES