Issue 9, 2018

Field-induced slow magnetic relaxation of two 1-D compounds containing six-coordinated cobalt(ii) ions: influence of the coordination geometry

Abstract

Two one-dimensional (1-D) cobalt(II) compounds, namely, {[Co(L1)(2,2′-bipy)]·0.5DMF}n (1) and {[Co(bimb)(H2O)4]·(L2)·2DMF}n (2) (H2L1 = 2,2′-[benzene-1,4-diylbis(methanediylsulfanediyl)]dibenzoic acid, H2L2 = 2,2′-(1,4-phenylenebis(methylene))bis(sulfanediyl)dinicotinic acid, 2,2′-bipy = 2,2′-bipyridine, bimb = 1,4-bis(benzoimidazo-1-ly)benzene), have been synthesized using cobalt(II) salts with long flexible carboxylic acids and N-containing ligands. Compounds 1 and 2 were systematically characterized by elemental analysis, infrared spectroscopy, and single crystal X-ray diffraction analysis. Both compounds display 1-D chain structures with two types of well-separated six-coordinated cobalt(II) ions possessing the same coordination sphere CoO4N2 but different coordination geometries: distorted trigonal prism and octahedron, respectively, which lead to different magnetic properties. Compound 1 exhibits more significant frequency-dependent signals and larger field-induced slow relaxation magnetization than compound 2. High frequency electron paramagnetic resonance (HF-EPR) studies further demonstrated the large anisotropy of both compounds with D values of −56.2 and +57.5 cm−1, respectively.

Graphical abstract: Field-induced slow magnetic relaxation of two 1-D compounds containing six-coordinated cobalt(ii) ions: influence of the coordination geometry

Supplementary files

Article information

Article type
Research Article
Submitted
26 Apr 2018
Accepted
23 Jul 2018
First published
26 Jul 2018

Inorg. Chem. Front., 2018,5, 2314-2320

Field-induced slow magnetic relaxation of two 1-D compounds containing six-coordinated cobalt(II) ions: influence of the coordination geometry

Z. Chen, L. Yin, X. Mi, S. Wang, F. Cao, Z. Wang, Y. Li, J. Lu and J. Dou, Inorg. Chem. Front., 2018, 5, 2314 DOI: 10.1039/C8QI00388B

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