Chemical transformation of a luminescent two-dimensional Eu(iii) coordination polymer in the aqueous phase

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dc.contributor.authorDa Silva, Caroline Moraes [UNESP]
dc.contributor.authorEllena, Javier
dc.contributor.authorFrem, Regina Célia Galvão [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2020-12-12T01:30:08Z
dc.date.available2020-12-12T01:30:08Z
dc.date.issued2020-06-28
dc.description.abstractIn this work, the 2D Eu(iii) coordination polymer {[Eu(HPDC)(PDC)]}n (PDC = 2,6-pyridinedicarboxylate) (1) was prepared in a fast manner via microwave-assisted hydrothermal synthesis. The same compound was obtained by a conventional hydrothermal route and had its structure determined through single crystal X-ray diffraction. In 1, the HPDC and PDC ligands exhibit terminal and chelating bridging modes, respectively, forming a coordination polymer through interconnected europium-carboxylate chains, leading to a highly ordered two-dimensional layer. The nanosheets in 1 self-organize in the solid-state by intermolecular interactions, producing a 3D supramolecular network. Solid-state photoluminescence studies have shown that the antenna effect is responsible for the red emission of the compound under ultraviolet excitation. In alcoholic solutions, it was possible to exfoliate the material by ultrasonication in a top-down approach, leading to single nanosheets of 1. In the chemical stability studies, there was observed a water-induced transformation of 1, leading to the compound {[Eu(PDC)(HPDC)(H2O)2]·4H2O}n (2). The aqueous suspension of this material shows strong red luminescence with the naked-eye. 2 demonstrates reversible behavior induced by heating under reduced pressure. Our work highlights the properties related to solvent-induced exfoliation and water-induced transformation.en
dc.description.affiliationInstitute of Chemistry São Paulo State University UNESP
dc.description.affiliationSão Carlos Institute of Physics University of São Paulo USP
dc.description.affiliationUnespInstitute of Chemistry São Paulo State University UNESP
dc.format.extent10146-10152
dc.identifierhttp://dx.doi.org/10.1039/c9nj06075h
dc.identifier.citationNew Journal of Chemistry, v. 44, n. 24, p. 10146-10152, 2020.
dc.identifier.doi10.1039/c9nj06075h
dc.identifier.issn1369-9261
dc.identifier.issn1144-0546
dc.identifier.lattes8534138813417161
dc.identifier.orcid0000-0003-1574-681X
dc.identifier.scopus2-s2.0-85087542476
dc.identifier.urihttp://hdl.handle.net/11449/199077
dc.language.isoeng
dc.relation.ispartofNew Journal of Chemistry
dc.sourceScopus
dc.titleChemical transformation of a luminescent two-dimensional Eu(iii) coordination polymer in the aqueous phaseen
dc.typeArtigo
unesp.author.lattes8534138813417161[3]
unesp.author.orcid0000-0003-1574-681X[3]

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