Anilato‐Based Coordination Polymers with Slow Relaxation of the Magnetization: Role of the Synthetic Method and Anilato Ligand

We have prepared and characterized three coordination polymers formulated as [Dy2(C6O4Cl2)3(fma)6] ⋅ 4.5fma (1) and [Dy2(C6O4X2)3(fma)6] ⋅ 4fma ⋅ 2H2O with X=Br (2) and Cl (3), where fma=formamide and C6O4X22−=3,6‐disubstituted‐2,5‐dihydroxy‐1,4‐benzoquinone dianion with X=Cl (chloranilato) and Br (...

Full description

Saved in:
Bibliographic Details
Published in:Chemistry : a European journal 2024-05, Vol.30 (28), p.e202400410-n/a
Main Authors: Benmansour, Samia, Pintado‐Zaldo, Cristina, Casal‐García, Sofía H., Martínez‐Ponce, Javier, Gómez‐García, Carlos J.
Format: Article
Language:English
Subjects:
anilato ligands
Anions
Benzoquinone
Coordination polymers
Crystallization
dysprosium(III)
layered compounds
Ligands
Low temperature
Magnetic field
Magnetic fields
Magnetic measurement
magnetic properties
Magnetization
Polymers
single-ion magnets
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have prepared and characterized three coordination polymers formulated as [Dy2(C6O4Cl2)3(fma)6] ⋅ 4.5fma (1) and [Dy2(C6O4X2)3(fma)6] ⋅ 4fma ⋅ 2H2O with X=Br (2) and Cl (3), where fma=formamide and C6O4X22−=3,6‐disubstituted‐2,5‐dihydroxy‐1,4‐benzoquinone dianion with X=Cl (chloranilato) and Br (bromanilato). Compounds 1 and 3 are solvates obtained with slow and fast precipitation methods, respectively. Compounds 2 and 3 are isostructural and only differ in the X group of the anilato ligand. The three compounds present (6,3)‐gon two‐dimensional hexagonal honey‐comb structures. Magnetic measurements indicate that the three compounds show slow relaxation of the magnetization at low temperatures when a continuous magnetic field is applied, although with different relaxation times and energy barriers depending on X and the crystallisation molecules. Compounds 1–3 represent the first examples of anilato‐based lattices with formamide and field‐induced slow relaxation of the magnetization. The anilato‐based DyIII‐containing compounds formulated as [Dy2(C6O4Cl2)3(fma)6] ⋅ 4.5fma (1) and [Dy2(C6O4X2)3(fma)6] ⋅ 4fma ⋅ 2H2O, with X=Br (2) and Cl (3), prepared with formamide as coordinating solvent, are coordination polymers with a honey‐comb layered structure showing slow magnetic relaxation when a DC field is applied. Compounds 1 and 3 are solvates obtained with a slow and fast crystallization method, respectively. Compounds 2 and 3 are isostructural.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202400410