English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/86911
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Chemical interactions and spin structure in (O2)4: Implications for the ε-O2 phase

AutorGarcía-Revilla, M. A.; Francisco, E; Martín Pendás, A. ; Recio, José Manuel; Bartolomei, Massimiliano ; Hernández, Marta I. ; Campos-Martínez, José ; Carmona-Novillo, Estela ; Hernández-Lamoneda, Ramón
Fecha de publicación2013
EditorAmerican Chemical Society
CitaciónJournal of Chemical Theory and Computation 9: 2179- 2188 (2013)
ResumenThe chemical interactions and spin structure of (O2)4 in its ground singlet state are analyzed by means of Quantum Chemical Topology descriptors. The energetic contributions of the Interacting Quantum Atoms approach are used to obtain information about the class of interactions displayed along the dissociation path of (O2)4. The exchange-correlation contribution to the binding energy is non-negligible for the O2-O2 interactions at intermolecular distances close to those found for the pressure induced ε phase of solid (O2) and this strengthening of the intermolecular bonding is built up from a simultaneous weakening of the intramolecular bond. This result is of interest in connection with the observed softening of the IR vibron frequency in the lower pressure range of the ε phase. The spin structure in the real space along the dissociation process is interpreted with the help of the so-called electron number distribution functions. At large distances, the four triplet O 2 molecules are arranged in a way consistent with an antiferromagnetic structure, whereas at short distances, a significant spin redistribution is driven by the exchange process and it involves a propensity toward a null magnetic moment per molecule. Such probability behavior can be related with the magnetic evolution of solid oxygen across the δ → ε phase transition. Additional calculations of (O2)4 excited states support the conclusion that the relative stabilization and magnetic features of the ground singlet state are due to the onset of the new intermolecular bonds, and not to an exclusive modification of the electronic character within the O2 molecules. © 2013 American Chemical Society.
URIhttp://hdl.handle.net/10261/86911
DOI10.1021/ct301070f
Identificadoresdoi: 10.1021/ct301070f
issn: 1549-9618
Aparece en las colecciones: (CFMAC-IFF) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


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