Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation
Two structurally dissimilar 3d-4f cages having the formulae [(Co<sup>III</sup>)<sub>3</sub>Gd<sub>4</sub>(μ<sub>3</sub>-OH)<sub>2</sub>(CO<sub>3</sub>) (O<sub>2</sub>C<sup>t</sup>Bu)<sub>11</sub&...
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MDPI AG
2022-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/3/1130 |
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| author | Javeed Ahmad Sheikh Himanshu Sekhar Jena Sanjit Konar |
| author_facet | Javeed Ahmad Sheikh Himanshu Sekhar Jena Sanjit Konar |
| author_sort | Javeed Ahmad Sheikh |
| collection | DOAJ |
| description | Two structurally dissimilar 3d-4f cages having the formulae [(Co<sup>III</sup>)<sub>3</sub>Gd<sub>4</sub>(μ<sub>3</sub>-OH)<sub>2</sub>(CO<sub>3</sub>) (O<sub>2</sub>C<sup>t</sup>Bu)<sub>11</sub>(teaH)<sub>3</sub>]·5H<sub>2</sub>O (<b>1</b>) and [(Co<sup>III</sup>)<sub>3</sub>Dy<sub>3</sub>(μ<sub>3</sub>-OH)<sub>4</sub>(O<sub>2</sub>C<sup>t</sup>Bu)<sub>6</sub>(teaH)<sub>3</sub>]·(NO<sub>3</sub>)<sub>2</sub>·H<sub>2</sub>O (<b>2</b>) have been isolated under similar reaction conditions and stoichiometry of the reactants. The most important factor for structural diversity seems to be the incorporation of one μ<sub>3</sub>-carbonate anion in <b>1</b> and not in <b>2</b>. Co atoms are in a +3 oxidation state in both complexes, as shown by the Bond Valence Sum (BVS) calculations and bond lengths, and as further supported by magnetic measurements. Co<sub>3</sub>Gd<sub>4</sub> displays a significant magnetocaloric effect (−∆S<sub>m</sub> = 25.67 J kg<sup>−1</sup> K<sup>−1</sup>), and Co<sub>3</sub>Dy<sub>3</sub> shows a single molecule magnet (SMM) behavior. |
| first_indexed | 2024-03-09T23:26:19Z |
| format | Article |
| id | doaj.art-5b31de054cb64df9b514c297ac0016a0 |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T23:26:19Z |
| publishDate | 2022-02-01 |
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| series | Molecules |
| spelling | doaj.art-5b31de054cb64df9b514c297ac0016a02023-11-23T17:18:06ZengMDPI AGMolecules1420-30492022-02-01273113010.3390/molecules27031130Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of MagnetisationJaveed Ahmad Sheikh0Himanshu Sekhar Jena1Sanjit Konar2Department of Chemistry, Government, College for Women, Constituent College of Cluster University, M. A. Road, Srinagar 190001, Jammu and Kashmir, IndiaDepartment of Chemistry, IISER Bhopal, Bhopal By-Pass Road, Bhopal 462066, Madhya Pradesh, IndiaDepartment of Chemistry, IISER Bhopal, Bhopal By-Pass Road, Bhopal 462066, Madhya Pradesh, IndiaTwo structurally dissimilar 3d-4f cages having the formulae [(Co<sup>III</sup>)<sub>3</sub>Gd<sub>4</sub>(μ<sub>3</sub>-OH)<sub>2</sub>(CO<sub>3</sub>) (O<sub>2</sub>C<sup>t</sup>Bu)<sub>11</sub>(teaH)<sub>3</sub>]·5H<sub>2</sub>O (<b>1</b>) and [(Co<sup>III</sup>)<sub>3</sub>Dy<sub>3</sub>(μ<sub>3</sub>-OH)<sub>4</sub>(O<sub>2</sub>C<sup>t</sup>Bu)<sub>6</sub>(teaH)<sub>3</sub>]·(NO<sub>3</sub>)<sub>2</sub>·H<sub>2</sub>O (<b>2</b>) have been isolated under similar reaction conditions and stoichiometry of the reactants. The most important factor for structural diversity seems to be the incorporation of one μ<sub>3</sub>-carbonate anion in <b>1</b> and not in <b>2</b>. Co atoms are in a +3 oxidation state in both complexes, as shown by the Bond Valence Sum (BVS) calculations and bond lengths, and as further supported by magnetic measurements. Co<sub>3</sub>Gd<sub>4</sub> displays a significant magnetocaloric effect (−∆S<sub>m</sub> = 25.67 J kg<sup>−1</sup> K<sup>−1</sup>), and Co<sub>3</sub>Dy<sub>3</sub> shows a single molecule magnet (SMM) behavior.https://www.mdpi.com/1420-3049/27/3/1130coordination clustersingle molecular magnetmagnetic refrigerantcages |
| spellingShingle | Javeed Ahmad Sheikh Himanshu Sekhar Jena Sanjit Konar Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation Molecules coordination cluster single molecular magnet magnetic refrigerant cages |
| title | Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation |
| title_full | Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation |
| title_fullStr | Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation |
| title_full_unstemmed | Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation |
| title_short | Co<sub>3</sub>Gd<sub>4</sub> Cage as Magnetic Refrigerant and Co<sub>3</sub>Dy<sub>3</sub> Cage Showing Slow Relaxation of Magnetisation |
| title_sort | co sub 3 sub gd sub 4 sub cage as magnetic refrigerant and co sub 3 sub dy sub 3 sub cage showing slow relaxation of magnetisation |
| topic | coordination cluster single molecular magnet magnetic refrigerant cages |
| url | https://www.mdpi.com/1420-3049/27/3/1130 |
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