Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice
Herein, we present the synthesis and structural characterisation of two layered MOFs with the asymmetric ligand 3-chloro,6-cyano-2,5-dihydroxy-1,4-benzoquinone dianion (C<sub>6</sub>O<sub>4</sub>(CN)Cl<sup>2−</sup> = chlorocyananilato). These compounds, formulated...
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MDPI AG
2024-12-01
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| author | Samia Benmansour Christian Cerezo-Navarrete Carlos J. Gómez-García |
| author_facet | Samia Benmansour Christian Cerezo-Navarrete Carlos J. Gómez-García |
| author_sort | Samia Benmansour |
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| description | Herein, we present the synthesis and structural characterisation of two layered MOFs with the asymmetric ligand 3-chloro,6-cyano-2,5-dihydroxy-1,4-benzoquinone dianion (C<sub>6</sub>O<sub>4</sub>(CN)Cl<sup>2−</sup> = chlorocyananilato). These compounds, formulated as (H<sub>3</sub>O)[Eu(C<sub>6</sub>O<sub>4</sub>(CN)Cl)<sub>2</sub>(H<sub>2</sub>O)]·34H<sub>2</sub>O (<b>1</b>) and (H<sub>3</sub>O)[Dy(C<sub>6</sub>O<sub>4</sub>(CN)Cl)<sub>2</sub>(H<sub>2</sub>O)]·44H<sub>2</sub>O (<b>2</b>), are isostructural and show a (4,4)-layered square structure with the crystallisation water molecules located between the layers. The lanthanoid ions are surrounded by four bis-bidentate chlorocyananilato ligands that connect each Ln<sup>III</sup> centre with other four, giving rise to square cavities formed by Ln<sup>III</sup> centres in the vertices and chlorocyananilato ligands as the sides. There is an additional coordinated water molecule that occupies the caped position of the capped square antiprismatic coordination geometry around the Ln<sup>III</sup> centres. The magnetic properties show the presence of a field-induced slow relaxation of the magnetisation in the Dy<sup>III</sup> derivative at low temperatures that follows Direct and Orbach relaxation mechanisms with an energy barrier of 36(3) K. |
| format | Article |
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| institution | Kabale University |
| issn | 2312-7481 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Magnetochemistry |
| spelling | doaj-art-1ece510f475340088c1f7d2b7f3722ac2025-01-24T13:39:22ZengMDPI AGMagnetochemistry2312-74812024-12-01111110.3390/magnetochemistry11010001Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square LatticeSamia Benmansour0Christian Cerezo-Navarrete1Carlos J. Gómez-García2Departamento de Química Inorgánica, Universidad de Valencia, C/Dr. Moliner 50, 46100 Burjasot, Valencia, SpainDepartamento de Química Inorgánica, Universidad de Valencia, C/Dr. Moliner 50, 46100 Burjasot, Valencia, SpainDepartamento de Química Inorgánica, Universidad de Valencia, C/Dr. Moliner 50, 46100 Burjasot, Valencia, SpainHerein, we present the synthesis and structural characterisation of two layered MOFs with the asymmetric ligand 3-chloro,6-cyano-2,5-dihydroxy-1,4-benzoquinone dianion (C<sub>6</sub>O<sub>4</sub>(CN)Cl<sup>2−</sup> = chlorocyananilato). These compounds, formulated as (H<sub>3</sub>O)[Eu(C<sub>6</sub>O<sub>4</sub>(CN)Cl)<sub>2</sub>(H<sub>2</sub>O)]·34H<sub>2</sub>O (<b>1</b>) and (H<sub>3</sub>O)[Dy(C<sub>6</sub>O<sub>4</sub>(CN)Cl)<sub>2</sub>(H<sub>2</sub>O)]·44H<sub>2</sub>O (<b>2</b>), are isostructural and show a (4,4)-layered square structure with the crystallisation water molecules located between the layers. The lanthanoid ions are surrounded by four bis-bidentate chlorocyananilato ligands that connect each Ln<sup>III</sup> centre with other four, giving rise to square cavities formed by Ln<sup>III</sup> centres in the vertices and chlorocyananilato ligands as the sides. There is an additional coordinated water molecule that occupies the caped position of the capped square antiprismatic coordination geometry around the Ln<sup>III</sup> centres. The magnetic properties show the presence of a field-induced slow relaxation of the magnetisation in the Dy<sup>III</sup> derivative at low temperatures that follows Direct and Orbach relaxation mechanisms with an energy barrier of 36(3) K.https://www.mdpi.com/2312-7481/11/1/1slow magnetisation relaxationmetal–organic frameworkseuropium coordination polymerdysprosium coordination polymerlayered square lattice |
| spellingShingle | Samia Benmansour Christian Cerezo-Navarrete Carlos J. Gómez-García Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice Magnetochemistry slow magnetisation relaxation metal–organic frameworks europium coordination polymer dysprosium coordination polymer layered square lattice |
| title | Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice |
| title_full | Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice |
| title_fullStr | Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice |
| title_full_unstemmed | Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice |
| title_short | Slow Relaxation of the Magnetisation in a Two-Dimensional Metal–Organic Framework with a Layered Square Lattice |
| title_sort | slow relaxation of the magnetisation in a two dimensional metal organic framework with a layered square lattice |
| topic | slow magnetisation relaxation metal–organic frameworks europium coordination polymer dysprosium coordination polymer layered square lattice |
| url | https://www.mdpi.com/2312-7481/11/1/1 |
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