A novel nitronyl nitroxide radical and its Gd(III), Tb(III), Dy(III) complexes: Synthesis, structure and magnetic properties

Abstract Three new lanthanide complexes based on a novel nitronyl nitroxide radical [Ln(hfac) 3 (NITPhiPr) 2 ] (Ln = Gd( 1 ), Tb( 2 ), Dy( 3 ); hfac = hexafluoroacetylacetonate, NITPhiPr = 4′-isopropyl-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been successfully synthesized, characterized structurally and magnetically, which all display radical-Ln(III)-radical tri-spin structures. The magnetic studies reveal the ferromagnetic interactions between the Gd(III) ion and radicals and the antiferromagnetic interaction between two radicals in the complex 1 . And both Ln(III)–radical ferromagnetic interactions exist in complexes 2 and 3 .