Study of [Fe<sup>IIsup>(bpy)<sub>3sub>]<sup>2+sup> complex encapsulated in zeolite Y

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• 作者：R. Vijayalakshmi ; S.K. Kulshreshtha
• 关键词：Encapsulated [Fe<sup>IIsup>(bpy)<sub>3sub>]<sup>2+sup> ; Zeolite Y ; XRD ; M&#xf6 ; ssbauer ; Multinuclear NMR
• 刊名：Microporous and Mesoporous Materials
• 出版年：2008
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：15 April 2008
• 卷：111
• 期：1-3
• 页码：449-454
• 文件大小：321 K

摘要

Tris complex of Fe<sup>IIsup> with 2,2′ bipyridine (bpy) ligand, has been encapsulated in the supercages of zeolite Y and characterized by powder X-ray diffraction, Infrared spectroscopy, <sup>57sup>Fe M&#xf6;ssbauer, 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<sup>IIsup> and its subsequent complexing with bpy ligand. Based on the comparison of the results obtained for [Fe<sup>IIsup>(bpy)<sub>3sub>](ClO<sub>4sub>)<sub>2sub> and the [Fe(bpy)<sub>3sub>]Y complexes, it has been inferred that there is significant structural distortion for the encapsulated complex and all Fe is present as Fe<sup>IIsup> in low spin state, which is characterized by isomer shift, δ = 0.37 mm s<sup>−1sup> and quadrupole splitting, ΔE<sub>qsub> = 0.81 mm s<sup>−1sup> as revealed by <sup>57sup>Fe M&#xf6;ssbauer spectroscopic measurements.