Hexacoordinated Co() complex exhibiting strong magnetic anisotropy and field-induced slow magnetization relaxation: synthesis, magnetic characterization, and quantum-chemical modelling

A hexacoordinated Co( ii ) complex of [CoL(NCS) 2 ]·2DMSO ( 1 ) composition, where L is tetradentate bis-quinolyl hydrazone 2,2′-(2,2′-(butane-2,3-diylidene)bis(hydrazin-1-yl-2-ylidene))diquinoline, has been synthesised and characterized by IR, SCXRD, and AC and DC magnetic measurements. Due to heli...

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Bibliographic Details
Published in:New journal of chemistry 2023-06, Vol.47 (22), p.1884-1891
Main Authors: Tupolova, Yulia P, Lebedev, Vladimir E, Korchagin, Denis V, Tkachev, Valery V, Utenyshev, Andrey N, Morgunov, Roman B, Palii, Andrei V, Shcherbakov, Igor N, Aldoshin, Sergey M
Format: Article
Language:English
Subjects:
Chemical synthesis
Hydrazones
Magnetic anisotropy
Magnetic induction
Magnetic measurement
Magnetic properties
Magnetization
Quantum chemistry
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Summary:A hexacoordinated Co( ii ) complex of [CoL(NCS) 2 ]·2DMSO ( 1 ) composition, where L is tetradentate bis-quinolyl hydrazone 2,2′-(2,2′-(butane-2,3-diylidene)bis(hydrazin-1-yl-2-ylidene))diquinoline, has been synthesised and characterized by IR, SCXRD, and AC and DC magnetic measurements. Due to helix-like distortion of the complex, the Co( ii ) coordination polyhedron is distorted towards trigonal prismatic symmetry. Complex 1 demonstrates slow relaxation of magnetization in an applied DC magnetic field of 1000 Oe, which is well described by the Raman mechanism. The performed CASSCF+NEVPT2 calculations provide clear insight into the origin of the magnetic anisotropy in 1 . A hexacoordinated Co( ii ) complex [CoL(NCS) 2 ]·2DMSO ( L is diacetyl bis -quinolyl hydrazone) with field-induced SIM properties, has been synthesised and characterized by IR, SCXRD, and AC and DC magnetic measurements.
ISSN:1144-0546
1369-9261
DOI:10.1039/d3nj01481a