A Coordination Polymer of Dy(III) with Polycarboxylic Acid Ligand: Synthesis, Characterization and Magnetic Properties
A dysprosium-based metal–organic framework (MOF), namely [DyLH<sub>2</sub>O]<sub>n</sub> (<b>1</b>) (H<sub>3</sub>L = 4-((bis(carboxymethyl) amino)methyl)benzoic acid), was successfully synthesized via the hydrothermal method. According to the structur...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/15/6/550 |
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| Summary: | A dysprosium-based metal–organic framework (MOF), namely [DyLH<sub>2</sub>O]<sub>n</sub> (<b>1</b>) (H<sub>3</sub>L = 4-((bis(carboxymethyl) amino)methyl)benzoic acid), was successfully synthesized via the hydrothermal method. According to the structural characterization, metal centers in this complex are linked by four bridges (two oxygens and two carboxylic groups), leading to Dy<sub>2</sub> units. On further connection by single carboxylic groups, the dimeric units extend to form a two-dimensional layer with a 4<sup>4</sup> topological structure. Finally, the 2D layers were assembled into a 3D framework by the L<sup>−3</sup> anions. A thermogravimetric test shows that [DyLH<sub>2</sub>O]<sub>n</sub> can maintain high thermal stability after losing water, until the temperature reaches 426 °C. Magnetic studies on <b>1</b> reveal antiferromagnetic exchange interactions of Dy<sup>3+</sup>…Dy<sup>3+</sup> at low temperatures. Additionally, frequency-dependent out-of-phase signals were observed in alternating current (<i>ac</i>) magnetic susceptibility measurements for <b>1</b>, indicating that it has slow magnetic relaxation features. |
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| ISSN: | 2073-4352 |