Syntheses, crystal structures, magnetic properties of two new lanthanide-nitronyl nitroxide complexes (Ln = Gd, Nd) |
| |
Authors: | Chen-Xi Zhang Wen-Min WangXiang-Yu Zhao Ling-Fang JiYu-Ying Zhang |
| |
Affiliation: | a College of Science, Tianjin University of Science and Technology, Tianjin 300457, People’s Republic of China b Department of Chemistry, NanKai University, Tianjin 300071, People’s Republic of China |
| |
Abstract: | Two new complexes based on lanthanide ions and nitronyl nitroxide radical, Ln(hfac)3(NITPh-p-Cl)2 (Ln = Gd(1), Nd(2); hfac = hexafluoroacetylacetonate; NITPh-p-Cl = 2-(4′-chlorphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been synthesized and characterized by single-crystal X-ray diffraction. The single-crystal structures show that two complexes have similar structures, which consist of radical-Ln-radical isolated molecules. The Ln(III) ions are eight-coordinated in slightly distorted dodecahedral geometry. NITPh-p-Cl molecules act as monodentate ligands linking two Ln(III) ions through the oxygen atoms of the N-O groups. The magnetic studies show that the spin coupling between the Gd(III) ion and the radicals in the complex 1 is weak ferromagnetic (J = 0.38 cm−1), while complex 2 exhibits antiferromagnetic interactions (zJ′ = −0.36 cm−1) between Nd(III) ion and radicals. |
| |
Keywords: | Lanthanides Nitronyl nitroxide Crystal structure Magnetic properties |
本文献已被 ScienceDirect 等数据库收录! |
|