Resonance Raman spectroscopy of FeII FeIII and FeIII FeIII model complexes containing an unsymmetrical dinucleating ligand: a biomimetic redox pair for uteroferrin

Journal of the Brazilian Chemical Society

Horn Jr., Adolfo¹  Noda, Lucia K.¹  Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brazil¹  Gonçalves, Norberto S.¹  Lanznaster, Mauricio¹  Universidade Federal Fluminense, Niterói, Brazil¹  Universidade Federal de Santa Catarina, Florianópolis, Brazil¹  Neves, Ademir¹ 

关键词: Resonance Raman spectroscopy;    purple acid phosphatase;    biomimetic analogue;    mixed-valence;    unsymmetrical ligand;   

DOI  :  10.1590/S0103-50532006000800025

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Raman excitation profiles for the complex [FeIIFeIII(bpbpmp)(C2 H3O2)2](ClO4 ) (1), and its oxidized form, the new compound [FeIIIFeIII(bpbpmp)(C2 H3O2)2](ClO4 )2 (2), are reported. H2bpbpmp is the proligand 2-bis[{(2-pyridylmethyl)-aminomethyl}-6-{(2-hydroxybenzyl)(2 -pyridylmethyl)}-aminomethyl]-4-methylphenol. For compound 1, the most enhanced vibrational mode in the Raman spectra is the n(Fe-Ophen–terminal), observed at 608 cm-1. For compound 2, the n(COphen–terminal), which corresponds to the band at 1276 cm-1, becomes the most enhanced one. These differences are ascribed to the changes in the electronic structure of the dinuclear phenolate bridged core upon oxidation. The phenolate bridge allows charge density transmission between the metal centers.

【 授权许可】

Unknown