Weak ferromagnetism in 1D coordination polymers: Syntheses,crystal structures,spectroscopic and magnetic properties of [Cu(L)(Memal)]n (Memal = the dianion of methylmalonic acid,L = 1,10-phenanthroline, 2,2′-bipyridine) |
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Authors: | Catherine Gkioni Athanassios K. BoudalisYiannis Sanakis Catherine P. Raptopoulou |
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Affiliation: | Institute of Materials Science, NCSR “Demokritos”, 15310 Aghia Paraskevi, Athens, Greece |
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Abstract: | Investigation of the CuCl2/H2Memal/L (H2Memal = methylmalonic acid, L = 1,10-phenanthroline or 2,2′-bipyridine) reaction system in MeOH and various molar ratios has lead to the isolation of two one-dimensional coordination polymers presenting the [Cu(L)(Memal)] repeating unit (1, L = 1,10-phen; 2, L = 2,2′-bpy). The Memal2− ligand adopts the bidentate [chelating] + unidentate coordination mode between the CuII ions. Magnetic susceptibility measurements on 1 and 2 indicated the existence of weak ferromagnetic intrachain interactions and X-band EPR spectra from powdered samples of 1 and 2 are consistent with the stereochemistry of the CuII ions and with the presence of weak exchange interactions. |
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Keywords: | Copper(II) complexes Methylmalonato complexes 1,10-Phenanthroline 2,2&prime -Bipyridine Magnetic properties EPR spectroscopy |
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