Issue 4, 2023

Synthesis, structures and magnetic properties of four dysprosium-based complexes with a multidentate ligand with steric constraint

Abstract

Chemical modulation of metal complex structures holds great potential for the preparation of novel functional materials, and functional organic ligands are well-known to play a key role in the construction of metal complexes with specific properties. Herein, we design a multidentate ligand with steric constraint and different types of donors, 6,6′-(((1-(2-hydroxy-3-methoxyphenyl)-2-(pyridin-2-yl)ethane-1,2-diyl)bis(λ2-azanediyl))bis(methylene))bis(2-methoxyphenol) (H3L), to synthesize dysprosium-based complexes and study their magnetic properties. Depending on the experimental conditions, four new Dy-based complexes are obtained, namely, [Dy2(HpyL)(L)(CH3COO)]·2CH3CN·CH3OH (Dy2), [Dy4(HL)23-OH)2Cl6]·4CH3OH (Dy4), [Dy5(L)(μ4-O)(μ3-OH)(μ3-OCH3)2(CH3COO)7] (Dy5) and [Dy6(L)23-OH)4 (CH3COO)8]·4CH3OH (Dy6). Their structures are determined by single crystal X-ray diffraction. Magnetic characterization shows that the complexes Dy2 and Dy5 both exhibit slow magnetic relaxation behavior under zero dc field, with the effective energy barrier of magnetization reversal and a relaxation time being Ueff = 5.68 K and τ0 = 2.3 × 10−6 s, respectively, for Dy2, and Ueff = 3.1 K and τ0 = 3.6 × 10−5 s for Dy5.

Graphical abstract: Synthesis, structures and magnetic properties of four dysprosium-based complexes with a multidentate ligand with steric constraint

Supplementary files

Article information

Article type
Paper
Submitted
04 Sep 2022
Accepted
25 Nov 2022
First published
23 Dec 2022

CrystEngComm, 2023,25, 614-621

Synthesis, structures and magnetic properties of four dysprosium-based complexes with a multidentate ligand with steric constraint

W. Li, M. Ma, Q. Ni, S. Li, L. Gui and X. Wang, CrystEngComm, 2023, 25, 614 DOI: 10.1039/D2CE01201D

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