Spectroscopic investigations of iron(II) and iron(III) oxalates

Journal of the Brazilian Chemical Society

Maria C. D'antonio²  Alejandra Wladimirsky²  Daniel Palacios²  Liliana Coggiolaa²  Ana C. González-baró¹  Enrique J. Baran¹  Roberto C. Mercader¹ 

[1] ,UTN-Unidad Académica Río Gallegos Departamento de Ciencias Básicas Río Gallegos,Argentina

关键词: iron oxalates;    IR spectroscopy;    Raman spectroscopy;    Mössbauer;   

DOI  :  10.1590/S0103-50532009000300006

来源: SciELO

【 摘 要 】

In an attempt to contribute to a better characterization of FeII and FeIII oxalate complexes, an investigation of their vibrational (infrared and Raman) and 57Fe-Mössbauer spectra was performed. It is shown that the two polymorphs, α and β, of FeC2O4•2H2O cannot be accurately differentiated with any of these spectroscopic methods, demonstrating the high structural similarity of these two crystalline forms. Partially deuterated samples of β-FeC2O4•2H2O were also investigated to improve the vibrational-spectroscopic analysis. In the case of Fe2(C2O4)3•4H2O, a structural model, derived from results of combined vibrational and Mössbauer data, could be proposed. The 298 K Mössbauer spectrum for this complex is discussed in detail for the first time.

【 授权许可】

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