English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/95536
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 4 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Study of solid/liquid and solid/gas interfaces in Cu-isoleucine complex by surface X-ray diffraction

Autor Ferrer, Pilar ; Rubio-Zuazo, J. ; Castro, Germán R.
Palabras clave Surface diffraction
Cu–amino acid complex
Solid/liquid and solid/gas interfaces
Atomic surface structure
Fecha de publicación 2013
EditorElsevier
Citación Applied Surface Science 267: 124-127 (2013)
ResumenThe enzymes could be understood like structures formed by amino acids bonded with metals, which act as active sites. The research on the coordination of metal-amino acid complexes will bring light on the behavior of metal enzymes, due to the close relation existing between the atomic structure and the functionality. The Cu-isoleucine bond is considered as a good model system to attain a better insight into the characteristics of naturally occurring copper metalloproteins. The surface structure of metal-amino acid complex could be considered as a more realistic model for real systems under biologic working conditions, since the molecular packing is decreased. In the surface, the structural constrains are reduced, keeping the structural capability of surface complex to change as a function of the surrounding environment. In this work, we present a surface X-ray diffraction study on Cu-isoleucine complex under different ambient conditions. Cu(Ile)2 crystals of about 5 mm × 5 mm × 1 mm have been growth, by seeding method in a supersaturated solution, presenting a surface of high quality. The sample for the surface diffraction study was mounted on a cell specially designed for solid/liquid or solid/gas interface analysis. The Cu-isoleucine crystal was measured under a protective dry N2 gas flow and in contact with a saturated metal amino acid solution. The bulk and the surface signals were compared, showing different atomic structures. In both cases, from surface diffraction data, it is observed that the atomic structure of the top layer undergoes a clear structural deformation. A non-uniform surface relaxation is observed producing an inhomogeneous displacement of the surface atoms towards the surface normal. © 2012 Elsevier B.V. All rights reserved.
URI http://hdl.handle.net/10261/95536
DOI10.1016/j.apsusc.2012.08.039
Identificadoresdoi: 10.1016/j.apsusc.2012.08.039
issn: 0169-4332
Aparece en las colecciones: (ICMM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.