Abstract
Tris complex of Fe II with 2,2′ bipyridine (bpy) ligand, has been encapsulated in the supercages of zeolite Y and characterized by powder X-ray diffraction, Infrared spectroscopy, 57Fe Mössbauer, effect measurements and multinuclear NMR spectroscopy. The complex was prepared in the supercages of Zeolite Y by exchanging the cations of zeolite Y with Fe II and its subsequent complexing with bpy ligand. Based on the comparison of the results obtained for [Fe II(bpy) 3](ClO 4) 2 and the [Fe(bpy) 3]Y complexes, it has been inferred that there is significant structural distortion for the encapsulated complex and all Fe is present as Fe II in low spin state, which is characterized by isomer shift, δ = 0.37 mm s −1 and quadrupole splitting, Δ E q = 0.81 mm s −1 as revealed by 57Fe Mössbauer spectroscopic measurements.
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