Artículo
Demetalation of Surface Porphyrins at the Solid-Liquid Interface
Fernández, Cynthia Carolina
; Franke, Matthias; Steinruck, Hans Peter; Lytken, Ole; Williams, Federico José
Fecha de publicación:
01/2021
Editorial:
American Chemical Society
Revista:
Langmuir
ISSN:
0743-7463
e-ISSN:
1520-5827
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Understanding the factors that control the demetalation of surface porphyrins at the solid-liquid interface is important as the molecular properties of porphyrins are largely determined by their metal centers. In this work, we used X-ray photoelectron spectroscopy (XPS) to follow the demetalation of Zn and Cd tetraphenylporphyrin molecules (ZnTPP and CdTPP) adsorbed as three-monolayer-thin multilayer films on Au(111), by exposing the molecular layers to acidic aqueous solutions. We found that porphyrin molecules at the solid-liquid interface are less prone to lose their metal center than molecules in solution. We propose that this behavior is due to either the incoming protons provided by the solution or the outgoing metal ion having to pass through the hydrophobic porphyrin multilayers where they cannot be solvated. Our results are relevant for the design of molecular devices based on porphyrin molecules adsorbed on solid surfaces.
Palabras clave:
Porphyrins
,
Demetalation
,
Surface
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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
Fernández, Cynthia Carolina; Franke, Matthias; Steinruck, Hans Peter; Lytken, Ole; Williams, Federico José; Demetalation of Surface Porphyrins at the Solid-Liquid Interface; American Chemical Society; Langmuir; 37; 2; 1-2021; 852-857
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