Chemistry
Document Type
Article
Abstract
Halide-bridged polymers have gained significant interest due to their diverse properties and potential applications. Stacked Cu2L2X4 dimers, where L is an organic ligand and X can be Cl− or Br−, are of interest because a chloride analogue where L = 2-pyridone, had previously been reported to exhibit bulk ferromagnetism, which augured great potentiality for this class of compounds. The synthesis, structural characterization, magnetic susceptibility measurements, and computational studies of two isostructural CuClMI (MI = methylisothiazolinone) and CuBrMI polymers of Cu(ii), along with a related CuClPYR (PYR = 2-pyridone) is reported. CuClMI and CuBrMI were found to exhibit AFM bulk properties, due to FM/AFM alternating chains along the halide-bridged polymer axis, while FM bulk properties were confirmed for CuClPYR exhibiting a FM spin ladder. In combination with a benzamide analogue, CuClBA, three O-donor amides, CuClMI, CuClBA and CuClPYR were analyzed and revealed that the kinetic exchange is affected by the identity, but more importantly, the orientation of the satellite ligands. The torsional angle of the ligand with the dimer plane is shown to significantly affect the magnetic exchange in the dimer, and between dimers, explaining the reported FM bulk properties of CuClPYR. This finding is exceedingly important, as it suggests that a spin device can be constructed to flip between singlet/triplet states by manipulating the orientation of the satellite/terminal ligand. © 2023 The Royal Society of Chemistry.
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Publication Title
Physical Chemistry Chemical Physics
Publication Date
2-28-2023
Volume
25
Issue
13
First Page
9176
Last Page
9187
ISSN
1463-9076
DOI
10.1039/d2cp05629a
Keywords
amides, chlorine compounds, copper compounds, frequency modulation, ligands, magnetic susceptibility, satellites
Repository Citation
Coetzee, Stefan; Turnbull, Mark M.; Landee, Christopher; Monroe, Jeffrey C.; Deumal, Mercè; Novoa, Juan J.; and Rademeyer, Melanie, "Satellite ligand effects on magnetic exchange in dimers. A structural, magnetic and theoretical investigation of Cu2L2X4 (L = methylisothiazolinone and X = Cl−, Br−)" (2023). Chemistry. 8.
https://commons.clarku.edu/chemistry/8
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.