Artículo
Water-Soluble Nitroxyl Porphyrin Complexes FeIITPPSHNO and FeIITPPSNO- Obtained from Isolated FeIITPPSNO·
Fecha de publicación:
10/2019
Editorial:
American Chemical Society
Revista:
Journal of the American Chemical Society
ISSN:
0002-7863
e-ISSN:
1520-5126
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The first biomimetic water soluble FeII-porphyrin nitroxyl complexes were obtained and characterized by UV-Vis in protonated and deprotonated forms by reduction of previously isolated and characterized FeIITPPSNO?. The pKa involved in the FeII-HNO ⇄ FeII-NO− + H+ equilibrium was estimated to be around 9.7. The FeIITPPSHNO complex spontaneously reoxidizes to the nitrosyl form following a first order kinetic decay with a measured kinetic constant of k = 0.017 s-1. Experiments show that the HNO adduct undergoes unimolecular homolytic cleavage of the H-NO bond. DFT calculations suggest a phlorin radical intermediate for this reaction. The deprotonated NO− complex resulted more stable, with a half-life of about 10 minutes.
Palabras clave:
IRON
,
PORPHYRIN
,
NITROXYL
,
HNO
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Mazzeo, Agostina María; Pellegrino, Juan; Doctorovich, Fabio; Water-Soluble Nitroxyl Porphyrin Complexes FeIITPPSHNO and FeIITPPSNO- Obtained from Isolated FeIITPPSNO·; American Chemical Society; Journal of the American Chemical Society; 141; 46; 10-2019; 18521-18530
Compartir
Altmétricas