Synthesis And Study On The Properties Of Molecular Materials Based On Nitronyl Nitroxide Through Change Of Metal Ions

Nitroxide-metal complexes is an important branch of molecule-based magnets, research is significant. In this paper, organic nitronyl nitroxide and transition metal salt hexafluoroacetylacetone coordination reaction of rare earth metals, the design and synthesis of a variety of nitronyl nitroxide-metal complexes, and characterized by elemental analysis, IR analysis, UV analysis, should be analyzed, X-diffraction analysis, and variable temperature magnetic susceptibility studies. Include the following:1. Using the nitronyl nitroxide of phenoxyphenyl for organic ligands to react with hexafluoroacetylacetonate salt of rare earth metals and transition metals,13complexes was obtained. Crystal structure analysis for [Mn(hfac)2(NITPh-m-OPh)2] reveal that the complex is mononuclear three spin structure. There are no intermolecular hydrogen bonds. Nitronyl nitroxide of Phenoxyphenyl, as bridge ligand, connect Mn(Ⅱ) ions to form a one-dimensional chain structure.2. Using the nitronyl nitroxide of dimethylaminophenyl for organic ligands and synthesized10complexes, and [Tb(hfac)3(NITPh-pN (CH3)2)2],[La(hfac)3(NITPh-pN (CH3)2)2],[Eu (hfac)3(NITPh-pN(CH3)2)2] for the crystal structure analysis, three central metal complexes ion Ln (Ⅲ) have taken eight ligands formed deformed dodecahedron, which [Tb(hfac)3(NITPh-pN(CH3)2)2],[La(hfac)3(NITPh-pN(CH3)2)2] is formed by intermolecular hydrogen bond structure of the two-dimensional plane, and [Eu (hfac)3(NITPh-pN(CH3)2)2] to form a wave-shaped dimensional chain structure by hydrogen bonds. In addition, for [Tb(hfac)3(NITPh-pN (CH3)2)2], magnetic complexes showed Curie constant C=8.63cm3Kmol-1, Weiss constant θ-=3.47K, data indicate the presence of weak antiferromagnetic interaction system.3. Using the nitronyl nitroxide of chloro-phenyl for organic ligands and synthesized10complexes,and the complexes of Mn2(hfac)4(NITPh-p-Cl)2was analysis by crystal structure, six ligand complexes dual-core dimer structure, two central ion Mn (Ⅱ) share two nitroxides, with the same oxygen atoms on the nitrogen and oxygen free radicals, forming an equilateral quadrangle. There are intermolecular hydrogen bonds to from a two-dimensional planar structure.