Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks

Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks

Four new gadolinium(III) metal-organic frameworks containing 2,2′-bipyridyl (bpy) or 1,10-phenanthroline (phen) chelate ligands and <i>trans</i>-1,4-cyclohexanedicarboxylate (chdc<sup>2−</sup>) were synthesized. Their crystal structures were determined by single-crystal X-ray...

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Autores principales: Pavel A. Demakov, Alena A. Vasileva, Vladimir A. Lazarenko, Alexey A. Ryadun, Vladimir P. Fedin
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
metal-organic frameworks
coordination polymers
rare earth elements
gadolinium
luminescence
Crystallography
QD901-999
Acceso en línea:https://doaj.org/article/ec5f8095da3c4379902fb6e5edc248ea
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spelling oai:doaj.org-article:ec5f8095da3c4379902fb6e5edc248ea2021-11-25T17:19:05ZCrystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks10.3390/cryst111113752073-4352https://doaj.org/article/ec5f8095da3c4379902fb6e5edc248ea2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1375https://doaj.org/toc/2073-4352Four new gadolinium(III) metal-organic frameworks containing 2,2′-bipyridyl (bpy) or 1,10-phenanthroline (phen) chelate ligands and <i>trans</i>-1,4-cyclohexanedicarboxylate (chdc<sup>2−</sup>) were synthesized. Their crystal structures were determined by single-crystal X-ray diffraction analysis. All four coordination frameworks are based on the binuclear carboxylate building units. In the compounds [Gd<sub>2</sub>(bpy)<sub>2</sub>(chdc)<sub>3</sub>]·H<sub>2</sub>O (<b>1</b>) and [Gd<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>3</sub>]·0.5DMF (<b>2</b>), the six-connected {Ln<sub>2</sub>(L)<sub>2</sub>(OOCR)<sub>6</sub>} blocks form a 3D network with the primitive cubic (pcu) topology. In the compounds [Gd<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>2</sub>]·2DMF (<b>3</b>) and [Gd<sub>2</sub>Cl<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>2</sub>]·0.3DMF·2.2dioxane (<b>4</b>), the four-connected {Ln<sub>2</sub>(L)<sub>2</sub>(X)<sub>2</sub>OOCR)<sub>4</sub>} units (where X = NO<sub>3</sub><sup>−</sup> for <b>3</b> or Cl<sup>−</sup> for <b>4</b>) form a 2D square-grid (sql) network. The solid-state luminescent properties were investigated for the synthesized frameworks. Bpy-containing compound <b>1</b> shows no luminescence, possibly due to the paramagnetic quenching by Gd<sup>3+</sup> cation. In contrast, the phenathroline-containing MOFs <b>2</b>–<b>4</b> possess yellow emission under visible excitation (λ<sub>ex</sub> = 460 nm) with the tuning of the characteristic wavelength by the coordination environment of the metal center.Pavel A. DemakovAlena A. VasilevaVladimir A. LazarenkoAlexey A. RyadunVladimir P. FedinMDPI AGarticlemetal-organic frameworkscoordination polymersrare earth elementsgadoliniumluminescenceCrystallographyQD901-999ENCrystals, Vol 11, Iss 1375, p 1375 (2021)
institution DOAJ
collection DOAJ
language EN
topic metal-organic frameworks
coordination polymers
rare earth elements
gadolinium
luminescence
Crystallography
QD901-999
spellingShingle metal-organic frameworks
coordination polymers
rare earth elements
gadolinium
luminescence
Crystallography
QD901-999
Pavel A. Demakov
Alena A. Vasileva
Vladimir A. Lazarenko
Alexey A. Ryadun
Vladimir P. Fedin
Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
description Four new gadolinium(III) metal-organic frameworks containing 2,2′-bipyridyl (bpy) or 1,10-phenanthroline (phen) chelate ligands and <i>trans</i>-1,4-cyclohexanedicarboxylate (chdc<sup>2−</sup>) were synthesized. Their crystal structures were determined by single-crystal X-ray diffraction analysis. All four coordination frameworks are based on the binuclear carboxylate building units. In the compounds [Gd<sub>2</sub>(bpy)<sub>2</sub>(chdc)<sub>3</sub>]·H<sub>2</sub>O (<b>1</b>) and [Gd<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>3</sub>]·0.5DMF (<b>2</b>), the six-connected {Ln<sub>2</sub>(L)<sub>2</sub>(OOCR)<sub>6</sub>} blocks form a 3D network with the primitive cubic (pcu) topology. In the compounds [Gd<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>2</sub>]·2DMF (<b>3</b>) and [Gd<sub>2</sub>Cl<sub>2</sub>(phen)<sub>2</sub>(chdc)<sub>2</sub>]·0.3DMF·2.2dioxane (<b>4</b>), the four-connected {Ln<sub>2</sub>(L)<sub>2</sub>(X)<sub>2</sub>OOCR)<sub>4</sub>} units (where X = NO<sub>3</sub><sup>−</sup> for <b>3</b> or Cl<sup>−</sup> for <b>4</b>) form a 2D square-grid (sql) network. The solid-state luminescent properties were investigated for the synthesized frameworks. Bpy-containing compound <b>1</b> shows no luminescence, possibly due to the paramagnetic quenching by Gd<sup>3+</sup> cation. In contrast, the phenathroline-containing MOFs <b>2</b>–<b>4</b> possess yellow emission under visible excitation (λ<sub>ex</sub> = 460 nm) with the tuning of the characteristic wavelength by the coordination environment of the metal center.
format article
author Pavel A. Demakov
Alena A. Vasileva
Vladimir A. Lazarenko
Alexey A. Ryadun
Vladimir P. Fedin
author_facet Pavel A. Demakov
Alena A. Vasileva
Vladimir A. Lazarenko
Alexey A. Ryadun
Vladimir P. Fedin
author_sort Pavel A. Demakov
title Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
title_short Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
title_full Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
title_fullStr Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
title_full_unstemmed Crystal Structures, Thermal and Luminescent Properties of Gadolinium(III) <i>Trans</i>-1,4-cyclohexanedicarboxylate Metal-Organic Frameworks
title_sort crystal structures, thermal and luminescent properties of gadolinium(iii) <i>trans</i>-1,4-cyclohexanedicarboxylate metal-organic frameworks
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/ec5f8095da3c4379902fb6e5edc248ea
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