Unusual Ln-radical chains constructed from functionalized nitronyl nitroxides: Synthesis, structure and magnetic properties

• Published in: Inorganic chemistry communications Vol. 76; pp. 59 - 61
• Main Authors: Yang, Meng, Li, Hongdao, Li, Licun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2017
• Subjects: Functionalized nitronyl nitroxides; Lanthanide; Magnetic properties; One-dimensional chain; Lanthanide; One-dimensional chain; Functionalized nitronyl nitroxides; Magnetic properties
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2017.01.014

Two novel Ln-radical chains [Ln(hfac)3NIT-3Py-5Im]n (LnIII=Gd 1, Dy 2; hfac=hexafluoroacetylacetonate; NIT-3Py-5Im=2-(5-(1-imidazole)-3-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide) have been achieved. In two complexes, the functionalized radical ligand NIT-3Py-5Im acts as bridge ligand to link two Ln(III) ions through the NO group and the imidazole ring, leading to rare 1D lanthanide-radical chains. Magnetic studies show that antiferromagnetic interactions dominate in the system owing to the short contacts of NO groups between the chains. Two novel 1D chain Ln-rad complexes were obtained and antiferromagnetic interactions dominated in these complexes due to the short contacts of inter-chain NO groups. [Display omitted] •Two rare Ln-rad 1D chains were obtained by using functionalized nitronyl nitroxides.•The radicals bridge the Ln ions with a ‘head-to-tail’ motif.•Short distances of interchain NO groups are observed.•Important interchain antiferromagnetic couplings dominate in the system.