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

Norberto S. Gonçalves²  Adolfo Horn Jr.¹  Mauricio Lanznaster¹  Lucia K. Noda²  Ademir Neves² 

[1] ,Universidade Federal de Santa Catarina Centro de Ciências Físicas e Matemáticas Departamento de QuímicaFlorianópolis SC ,Brazil

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

DOI  :  10.1590/S0103-50532006000800025

来源: SciELO

【 摘 要 】

Raman excitation profiles for the complex [FeII FeIII(bpbpmp)(C2 H3O2)2](ClO4 ) (1), and its oxidized form, the new compound [FeIII FeIII(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 nu(Fe-Ophen-terminal), observed at 608 cm-1. For compound 2, the nu(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】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License