Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands

The coordination reaction of the [Dy(hfac)3(H2O)2] units (hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate) with the [8′-(Diphenoxylphosphinyl)[1,1′-binaphthalen]-8-yl]diphenoxylphosphine oxide ligand (...

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Autores principales:	Carlo Andrea Mattei, Bertrand Lefeuvre, Vincent Dorcet, Gilles Argouarch, Olivier Cador, Claudia Lalli, Fabrice Pointillart
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dysprosium β-diketonate binaphtyl polymorphs chirality single-molecule magnets Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/8e0c0e6e0bce40c5b215057975bd2e3f
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spelling	oai:doaj.org-article:8e0c0e6e0bce40c5b215057975bd2e3f2021-11-25T18:12:33ZCounterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands10.3390/magnetochemistry71101502312-7481https://doaj.org/article/8e0c0e6e0bce40c5b215057975bd2e3f2021-11-01T00:00:00Zhttps://www.mdpi.com/2312-7481/7/11/150https://doaj.org/toc/2312-7481The coordination reaction of the [Dy(hfac)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] units (hfac<sup>−</sup> = 1,1,1,5,5,5-hexafluoroacetylacetonate) with the [8′-(Diphenoxylphosphinyl)[1,1′-binaphthalen]-8-yl]diphenoxylphosphine oxide ligand (<b>L</b>) followed by a crystallisation in a 1:3 CH<sub>2</sub>Cl<sub>2</sub>:<i>n</i>-hexane solvent mixture led to the isolation of a new polymorph of formula [(Dy(hfac)<sub>3</sub>((<i>S</i>)-L))<sub>3</sub>]<sub>n</sub> (<b>1</b>). The X-ray structure on single crystal of <b>1</b> revealed the formation of a mono-dimensional coordination polymer with three crystallographically independent Dy<sup>III</sup> centres, which crystallised in the polar chiral P2<sub>1</sub> space group. Ac magnetic measurements highlighted single-molecule magnet behaviour under both zero and 1000 Oe applied magnetic field with magnetic relaxation through quantum tunneling of the magnetisation (QTM, zero field only) and Raman processes. Despite the three crystallographically independent Dy<sup>III</sup> centres adopting a distorted D<sub>4d</sub> coordination environment, a single slow magnetic relaxation contribution was observed at a slower rate than its previously studied [(Dy(hfac)<sub>3</sub>((<i>S</i>)-L))]<sub>n</sub> (<b>2</b>) polymorph.Carlo Andrea MatteiBertrand LefeuvreVincent DorcetGilles ArgouarchOlivier CadorClaudia LalliFabrice PointillartMDPI AGarticledysprosiumβ-diketonatebinaphtylpolymorphschiralitysingle-molecule magnetsChemistryQD1-999ENMagnetochemistry, Vol 7, Iss 150, p 150 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dysprosium β-diketonate binaphtyl polymorphs chirality single-molecule magnets Chemistry QD1-999
spellingShingle	dysprosium β-diketonate binaphtyl polymorphs chirality single-molecule magnets Chemistry QD1-999 Carlo Andrea Mattei Bertrand Lefeuvre Vincent Dorcet Gilles Argouarch Olivier Cador Claudia Lalli Fabrice Pointillart Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
description	The coordination reaction of the [Dy(hfac)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] units (hfac<sup>−</sup> = 1,1,1,5,5,5-hexafluoroacetylacetonate) with the [8′-(Diphenoxylphosphinyl)[1,1′-binaphthalen]-8-yl]diphenoxylphosphine oxide ligand (<b>L</b>) followed by a crystallisation in a 1:3 CH<sub>2</sub>Cl<sub>2</sub>:<i>n</i>-hexane solvent mixture led to the isolation of a new polymorph of formula [(Dy(hfac)<sub>3</sub>((<i>S</i>)-L))<sub>3</sub>]<sub>n</sub> (<b>1</b>). The X-ray structure on single crystal of <b>1</b> revealed the formation of a mono-dimensional coordination polymer with three crystallographically independent Dy<sup>III</sup> centres, which crystallised in the polar chiral P2<sub>1</sub> space group. Ac magnetic measurements highlighted single-molecule magnet behaviour under both zero and 1000 Oe applied magnetic field with magnetic relaxation through quantum tunneling of the magnetisation (QTM, zero field only) and Raman processes. Despite the three crystallographically independent Dy<sup>III</sup> centres adopting a distorted D<sub>4d</sub> coordination environment, a single slow magnetic relaxation contribution was observed at a slower rate than its previously studied [(Dy(hfac)<sub>3</sub>((<i>S</i>)-L))]<sub>n</sub> (<b>2</b>) polymorph.
format	article
author	Carlo Andrea Mattei Bertrand Lefeuvre Vincent Dorcet Gilles Argouarch Olivier Cador Claudia Lalli Fabrice Pointillart
author_facet	Carlo Andrea Mattei Bertrand Lefeuvre Vincent Dorcet Gilles Argouarch Olivier Cador Claudia Lalli Fabrice Pointillart
author_sort	Carlo Andrea Mattei
title	Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
title_short	Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
title_full	Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
title_fullStr	Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
title_full_unstemmed	Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands
title_sort	counterintuitive single-molecule magnet behaviour in two polymorphs of one-dimensional compounds involving chiral binol-derived bisphosphate ligands
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8e0c0e6e0bce40c5b215057975bd2e3f
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Counterintuitive Single-Molecule Magnet Behaviour in Two Polymorphs of One-Dimensional Compounds Involving Chiral BINOL-Derived Bisphosphate Ligands

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