Abstract
AbstractTwo new one‐dimensional nitronyl nitroxide radical–LnIII chain complexes, [Gd(hfac)3(NIT‐I)] (1) and [Tb(hfac)3(NIT‐I)] (2) (hfac = hexafluoroacetylacetonate; NIT‐I = 2‐iodo‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl 3‐oxide), have been synthesized. Both complexes have linear chain structures in which the NIT‐I radical ligands link the Ln(hfac)3 units through the oxygen atoms of the nitronyl nitroxide groups. Direct‐current magnetic studies show that the Gd complex is paramagnetic above 2.0 K, whereas the Tb complex exhibits 3D antiferromagnetic ordering with TN = 4.0 K. Furthermore, complex 2 possesses frequency‐dependent ac magnetic susceptibilities, which suggests slow magnetic relaxation.
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