Synthesis, characterization, thermal study, and luminescent a complex of Iron (III)

The binuclear iron(III) complex of the formula {[Fe(5,5´-dmbpy)2(OH2)]2(μ-O)}(NO3)4 (a) was prepared from the reaction of Fe(NO3)3·9H2O with 5,5´-dimethyl-2,2´-bipyridine. The complex (a) was characterized by FT-IR, UV–Vis, TGA, 1HNMR spectroscopy, elemental analysis and luminescence measurements. Its structure was investigated by the single-crystal diffraction method. Crystal structure analysis showed that both Fe(III) cations are coordinated by two bidentate ligands, one water molecule and one bridging oxygen atom, resulting in coordination by four nitrogen atoms of 5,5´-dmbipy ligands and two oxygen atoms. The coordination polyhedrons are distorted octahedral. The thermal stability and fluorescence property of (a) have also been investigated [1,2].