Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes
The reaction of [Ln(btfa)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] (btfa<sup>−</sup> = 4,4,4-trifluoro-1-phenyl-1,3-butanedionate) with additional 4,4,4-trifluoro-1-phenyl-1,3-butanedione (Hbtfa) and acridine (Acr) in ethanol allows the isolation of th...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/9/5/131 |
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| author | Saskia Speed Ànnia Tubau Ramon Vicente Eva Castro Mercè Font-Bardia |
| author_facet | Saskia Speed Ànnia Tubau Ramon Vicente Eva Castro Mercè Font-Bardia |
| author_sort | Saskia Speed |
| collection | DOAJ |
| description | The reaction of [Ln(btfa)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] (btfa<sup>−</sup> = 4,4,4-trifluoro-1-phenyl-1,3-butanedionate) with additional 4,4,4-trifluoro-1-phenyl-1,3-butanedione (Hbtfa) and acridine (Acr) in ethanol allows the isolation of the mononuclear compounds HAcr[Nd(btfa)<sub>4</sub>]·EtOH, (<b>1</b>) and HAcr[Ln(btfa)<sub>4</sub>], Ln = Dy (<b>2</b>) and Yb (<b>3</b>); HAcr<sup>+</sup> = acridinium cation. Magnetic measurements indicate that complexes <b>1</b>–<b>3</b> show field-induced single-ion magnet behavior with anisotropy energy barriers and preexponential factors of <i>U<sub>eff</sub></i> = 20.7 cm<sup>−1</sup>, τ<sub>0</sub> = 24.5 × 10<sup>−8</sup> s; <i>U<sub>eff</sub></i> = 40.5 cm<sup>−1</sup>, τ<sub>0</sub> = 8.6 × 10<sup>−10</sup> s and <i>U<sub>eff</sub></i> = 22.7 cm<sup>−1</sup>, τ<sub>0</sub> = 8.4 × 10<sup>−8</sup> s, for <b>1</b>–<b>3</b> respectively. The solid-state luminescence emission in the NIR region shows efficient energy transfer from the 4,4,4-trifluoro-1-phenyl-1,3-butanedionate ligands to the central Ln<sup>3+</sup> ion in the case of compounds <b>1</b> and <b>3</b>. |
| first_indexed | 2024-03-11T03:34:01Z |
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| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-11T03:34:01Z |
| publishDate | 2023-05-01 |
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| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-f8f070275097437da1245964156a021a2023-11-18T02:12:23ZengMDPI AGMagnetochemistry2312-74812023-05-019513110.3390/magnetochemistry9050131Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) ComplexesSaskia Speed0Ànnia Tubau1Ramon Vicente2Eva Castro3Mercè Font-Bardia4Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, SpainDepartament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, SpainDepartament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, SpainDepartament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, SpainDepartament de Mineralogia, Cristal·lografia i Dipòsits Minerals and Unitat de Difracció de R-X, Centre Científic i Tecnològic de la Universitat de Barcelona (CCiTUB), Universitat de Barcelona, Solé i Sabarís 1-3, E-08028 Barcelona, SpainThe reaction of [Ln(btfa)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] (btfa<sup>−</sup> = 4,4,4-trifluoro-1-phenyl-1,3-butanedionate) with additional 4,4,4-trifluoro-1-phenyl-1,3-butanedione (Hbtfa) and acridine (Acr) in ethanol allows the isolation of the mononuclear compounds HAcr[Nd(btfa)<sub>4</sub>]·EtOH, (<b>1</b>) and HAcr[Ln(btfa)<sub>4</sub>], Ln = Dy (<b>2</b>) and Yb (<b>3</b>); HAcr<sup>+</sup> = acridinium cation. Magnetic measurements indicate that complexes <b>1</b>–<b>3</b> show field-induced single-ion magnet behavior with anisotropy energy barriers and preexponential factors of <i>U<sub>eff</sub></i> = 20.7 cm<sup>−1</sup>, τ<sub>0</sub> = 24.5 × 10<sup>−8</sup> s; <i>U<sub>eff</sub></i> = 40.5 cm<sup>−1</sup>, τ<sub>0</sub> = 8.6 × 10<sup>−10</sup> s and <i>U<sub>eff</sub></i> = 22.7 cm<sup>−1</sup>, τ<sub>0</sub> = 8.4 × 10<sup>−8</sup> s, for <b>1</b>–<b>3</b> respectively. The solid-state luminescence emission in the NIR region shows efficient energy transfer from the 4,4,4-trifluoro-1-phenyl-1,3-butanedionate ligands to the central Ln<sup>3+</sup> ion in the case of compounds <b>1</b> and <b>3</b>.https://www.mdpi.com/2312-7481/9/5/131dysprosium(III)ytterbium(III)neodymium(III)beta-diketonate anionmagnetic propertiesSMMs |
| spellingShingle | Saskia Speed Ànnia Tubau Ramon Vicente Eva Castro Mercè Font-Bardia Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes Magnetochemistry dysprosium(III) ytterbium(III) neodymium(III) beta-diketonate anion magnetic properties SMMs |
| title | Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes |
| title_full | Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes |
| title_fullStr | Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes |
| title_full_unstemmed | Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes |
| title_short | Slow Magnetic Relaxation and Luminescence Properties in Tetra β-Diketonate Lanthanide(III) Complexes |
| title_sort | slow magnetic relaxation and luminescence properties in tetra β diketonate lanthanide iii complexes |
| topic | dysprosium(III) ytterbium(III) neodymium(III) beta-diketonate anion magnetic properties SMMs |
| url | https://www.mdpi.com/2312-7481/9/5/131 |
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