title: [(Cu-radical)2-Ln]: structure and magnetic properties of a hetero-tri-spin chain of rings (Ln = Y(III), Gd(III), Tb(III), Dy(III)).
abstract: Novel hetero-tri-spin coordination polymers formed of ring-shaped Cu-nitronyl nitroxide spin clusters and Ln(III) linkers are reported. These mixed 2p-3d-4f compounds of formula {[Ln(hfac)3][Cu(hfac)2(NIT-3Py)]2·C6H14}n [Ln(III) = Y (1), Gd (2), Tb (3), and Dy (4); NIT-3Py = 2-(3-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexa-fluoroacetylacetonate], exhibit a 1D chain structure consisting of [Cu(NIT-3Py)]2 rings linked by Ln(hfac)3 units. Their magnetic behavior is characteristic for ferromagnetic interactions between the metal centers and the coordinated radical units. The Tb derivative was found to exhibit slow relaxation of its magnetization.
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University , Tianjin 300071, China.
authors.forename: Xiufeng
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University , Tianjin 300071, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Hu
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University , Tianjin 300071, China.
authors.forename: Licun
authors.initials: L
authors.lastname: Li
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination) , 205 Route de Narbonne, F-31077 Toulouse, France.|Université de Toulouse, UPS, INPT, LCC , F-31077 Toulouse, France.
authors.forename: Jean-Pascal
authors.initials: JP
authors.lastname: Sutter