1. Syntheses, structures and magnetic properties of three dinuclear, one-dimensional and two-dimensional dysprosium(III) complexes based on naphthalene diimide salicylic acid.
- Author
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Chen, Jia-Ting, Kuang, Xiao-Man, Li, You-Hong, Zhong, Yun-Jing, Zhang, Hui, Su, Jia-Yin, Chen, Wen-Bin, and Dong, Wen
- Subjects
SINGLE molecule magnets ,LIGANDS (Chemistry) ,MAGNETIC structure ,MAGNETIC susceptibility ,CARBOXYL group - Abstract
Regulation of the complex structure is greatly significant for the preparation of single-molecule magnets (SMMs). In this work, a multidentate ligand of N,N′-bis(3-carboxy-4-hydroxyphenyl)-1,4,5,8-naphthalenetetradicarboximide (H
4 NDISA) has been synthesized and reacted with dysprosium(III) salt. By controlling the ratio of metal ions to the ligand and reaction temperature, three new dysprosium(III) complexes are obtained, namely, [Dy2 (H2 NDISA)3 (DMF)3 (H2 O)10 ]·1.4DMF·2.6H2 O (1), {[Dy(H2 NDISA)1.5 (DMF)(H2 O)4 ]·3DMF·4H2 O}n (2), and {[Dy(HNDISA)(H2 O)2 ]·4H2 O}n (3). Their structures are determined by single crystal X-ray diffraction. Crystallographic data demonstrate that complex 1 is a dinuclear dysprosium(III) complex linked by the bidentate ligand of H4 NDISA. The intramolecular Dy(III)⋯Dy(III) distance is 23.0861(7) Å. In complex 2, the carboxyl group in one of the ligands adopts a μ-η2 :η1 bridging mode to connect two Dy(III) ions, resulting in a Dy(III)⋯Dy(III) distance of 5.2611(5) Å. The other ligand adopts a tetradentate coordination mode to bridge two Dy(III) ions, forming an infinite one-dimensional chain structure along the c axis. Complex 3 displays a two-dimensional network structure. One carboxyl group in the ligand adopts a μ-η1 :η1 bridging mode growing along the c axis. Another carboxyl group in the ligand adopts a μ-η2 :η1 bridging mode. The shortest distance of Dy(III)⋯Dy(III) is 4.6138(5) Å. DC and alternating current (AC) magnetic susceptibilities of complexes 1–3 were measured. AC magnetic susceptibility measurements show that complexes 1–3 exhibit frequency-dependent ac susceptibilities. [ABSTRACT FROM AUTHOR]- Published
- 2024
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