Mössbauer, vibrational and electronic spectroscopy of trinuclear μ-oxo iron(III) acetate clusters with pyridine and derivatives as ligands期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Mössbauer, vibrational and electronic spectroscopy of trinuclear μ-oxo iron(III) acetate clusters with pyridine and derivatives as ligands

Authors:	Christiane Fernandes Eduardo Stadler Valderes Drago Carlos Jorge da Cunha Izaura Hiroko Kuwabara

Institution:	^aDepartamento de Quimica, Universidade Federal de Santa Catarina, Caixa Postal 476, 88.040-970, Florianópolis, Santa Catarina, Brazil;^bDepartamento de Fisica, Universidade Federal de Santa Catarina, Caixa Postal 476, 88040-970, Florianópolis, Santa Catarina, Brazil;^cDepartamento de Química, Universidade Federal do Paraná, 81.531-970, Curitiba, Paraná, Brazil

Abstract:	In this study we have investigated eight complexes of the general composition Fe₃O(OOCCH₃)₆(L)₃]NO₃, where L is a heterocyclic ligand, viz. a 4-substituted pyridine. The Mössbauer spectra of the complexes showed isomer shifts and quadrupole splittings that are characteristic of iron(III) high-spin complexes. The Mössbauer quadrupolar doublets showed asymmetries that are attributed principally to the Goldanskii-Karyagin effect. A correlation is proposed between the Mössbauer parameters, and between the energy of the charge transfer band spectra, and the pK_a values of the N-heterocyclic ligands.

Keywords:	Mö ssbauer and Infrared spectra Trinuclear μ-oxo iron(III) Pyridine Derivatives Acetate clusters
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