Lanthanide dimers in coordination chains constructed by sole dicarboxylate ligand for single-molecule magnet behavior and magnetocaloric effect

Zhang，Qian1; Yang，Shun Yi1; Chen，Shi Jie1; Shi，Le2; Yang，Jiong3; Tian，Zhengfang1; Ruan，Zhijun1; Shao，Dong1,4

2023-12-15

10.1016/j.molstruc.2023.136349

Journal of Molecular Structure   Impact Factor & Quartile

0022-2860

The solvothermal reaction of Dy(III) and Gd(III) ions with 2,5-di‑hydroxy-benzene-1,4-di-carboxylic acid (Hdhbdc) produced two new isostructural lanthanide(III) coordination chains with the general formula {[Ln(Hdhbdc)(HO)]·6HO} [Ln = Dy (1) and Gd (2)]. The chains consist of carboxylate-bridged dilanthanide(III) units linked by Hdhbdc ligands in an end-to-end bridging mode. The Dy and Gd ions are located in slightly distorted biaugmented trigonal prism (C) and triangular dodecahedron (D) coordination environments, respectively. Magnetic studies reveal the extremely weak antiferromagnetic interaction (J = -0.041 cm) between the magnetically isotropic Gd ions in 2. The dysprosium analogue was found to exhibit single-molecule magnet (SMM) behavior with a prominent QTM effect under zero dc field, which is largely due to large single-ion magnetic anisotropy of individual Dy ions and weak antiferromagnetic interaction. For the gadolinium chain, the magnetocaloric effect (MCE) was observed with a magnetic entropy change of 20.2 J kg K . These results demonstrate a dicarboxylate synthetic route for the preparation of coordination polymers containing dilanthanide units for SMM and MCE applications.

Dysprosium Gadolinium Magnetic relaxation Magnetocaloric effect Single-molecule magnet

English

Others

Huanggang Normal University[202210204];Huanggang Normal University[2042021033];

CHEMISTRY

2-s2.0-85166933641

Scopus

1.Hubei Key Laboratory of Processing and Application of Catalytic Materials,College of Chemistry and Chemical Engineering,Huanggang Normal University,Huanggang,438000,China
2.Stoddart Institute of Molecular Science,Department of Chemistry,Zhejiang University,Hangzhou,310027,China
3.Department of Chemistry,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
4.State Key Laboratory of Coordination Chemistry,Nanjing University,Nanjing,210023,China

Zhang，Qian,Yang，Shun Yi,Chen，Shi Jie,et al. Lanthanide dimers in coordination chains constructed by sole dicarboxylate ligand for single-molecule magnet behavior and magnetocaloric effect[J]. Journal of Molecular Structure,2023,1294.

Zhang，Qian.,Yang，Shun Yi.,Chen，Shi Jie.,Shi，Le.,Yang，Jiong.,...&Shao，Dong.(2023).Lanthanide dimers in coordination chains constructed by sole dicarboxylate ligand for single-molecule magnet behavior and magnetocaloric effect.Journal of Molecular Structure,1294.

Zhang，Qian,et al."Lanthanide dimers in coordination chains constructed by sole dicarboxylate ligand for single-molecule magnet behavior and magnetocaloric effect".Journal of Molecular Structure 1294(2023).