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- Title
Hetero-tri-spin [2p-3d-4f] Chain Compounds Based on Nitronyl Nitroxide Lanthanide Metallo-Ligands: Synthesis, Structure, and Magnetic Properties.
- Authors
Zhu, Mei; Hu, Peng; Li, Yungai; Wang, Xiufeng; Li, Licun; Liao, Daizheng; Durga Prasad Goli, V. M. L.; Ramasesha, S.; Sutter, Jean ‐ Pascal
- Abstract
Employing nitronyl nitroxide lanthanide(III) complexes as metallo-ligands allowed the efficient and highly selective preparation of three series of unprecedented hetero-tri-spin (CuLn-radical) one-dimensional compounds. These 2p-3d-4f spin systems, namely [Ln3Cu(hfac)11(NitPhOAll)4] (LnIII=Gd 1Gd, Tb 1Tb, Dy 1Dy; NitPhOAll=2-(4′-allyloxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), [Ln3Cu(hfac)11(NitPhOPr)4] (LnIII=Gd 2Gd, Tb 2Tb, Dy 2Dy, Ho 2Ho, Yb 2Yb; NitPhOPr=2-(4′-propoxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) and [Ln3Cu(hfac)11(NitPhOBz)4] (LnIII=Gd 3Gd, Tb 3Tb, Dy 3Dy; NitPhOBz=2-(4′-benzyloxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) involve O-bound nitronyl nitroxide radicals as bridging ligands in chain structures with a [Cu-Nit-Ln-Nit-Ln-Nit-Ln-Nit] repeating unit. The dc magnetic studies show that ferromagnetic metal-radical interactions take place in these hetero-tri-spin chain complexes, these and the next-neighbor interactions have been quantified for the Gd derivatives. Complexes 1Tb and 2Tb exhibit frequency dependence of ac magnetic susceptibilities, indicating single-chain magnet behavior.
- Subjects
NITROXIDES; LIGANDS (Chemistry); RARE earth metals; IMIDAZOLINES; CHEMICAL derivatives
- Publication
Chemistry - A European Journal, 2014, Vol 20, Issue 41, p13356
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201403581