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Oxalate‐Based 3D Chiral Magnets: The Series [Z II (bpy) 3 ][ClO 4 ][M II Fe III (ox) 3 ] (Z II = Fe, Ru; M II = Mn, Fe; bpy = 2,2'‐Bipyridine; ox = Oxalate Dianion)
Author(s) -
Coronado Eugenio,
GalánMascarós José R.,
GómezGarcía Carlos J.,
MartínezFerrero Eugenia,
Almeida Manuel,
Waerenborgh João C.
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400977
Subject(s) - isostructural , chemistry , oxalate , antiferromagnetism , crystallography , mössbauer spectroscopy , ferromagnetism , space group , ion , crystal structure , inorganic chemistry , x ray crystallography , condensed matter physics , physics , organic chemistry , diffraction , optics
The synthesis, structure, and physical properties of the oxalate‐based molecular magnets with the formula [Z II (bpy) 3 ][ClO 4 ][M II Fe III (ox) 3 ] (Z II = Fe, Ru; M II = Mn, Fe; bpy = 2,2'‐bipyridine; ox = oxalate dianion) are presented here. All compounds are isostructural and crystallize in the chiral cubic space group P 4 1 32, and contain three‐dimensional dimetallic networks formed by alternating M II and M III ions that are connected by oxalate anions. These compounds exhibit strong antiferromagnetic interactions that give rise to magnetic ordering as ferrimagnets or weak ferromagnets, with critical temperatures of up to 20 K, which is twice as high as those found for the isostructural magnets based on Cr III , as determined by magnetic measurements and Mössbauer spectroscopy. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)