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Abstract:

Using combined path integral-molecular dynamics simulation techniques, we analyze electronic solvation at the water/air interface. Superficial electrons present a considerable extent of spatial confinement, somewhat less marked but still comparable to that found in bulk. The characteristics of the interfacial polarization promote an overall structure for the solvated electron-polymer which looks flatter along the direction perpendicular to the interface. Spatial and orientational responses of different slabs in the close vicinity of the interface were also investigated. Solvent configurations obtained from the simulations have been used to analyze electronic excited states and the optical absorption spectrum of superficial electrons. Compared to bulk results, the distribution of bound electronic states at the surface presents similar characteristics, that is, a ground s-state and three, quasi-degenerate, p-like excited states. The reduction of the energy gap between the ground state and the rest of excited states leads to a ∼0.52 eV red-shift in the position of the absorption maximum. © 2005 American Chemical Society.

Registro:

Documento: Artículo
Título:Electronic states at the water/air interface
Autor:Rodriguez, J.; Laria, D.
Filiación:Unidad Actividad Química, Comn. Nac. de Ener. Atómica, Avenida Libertador 8250, 1429 Buenos Aires, Argentina
Depto. Quim. Inorg., Analitica/Q.F., INQUIMAE, Pabellón II, 1428 Buenos Aires, Argentina
Palabras clave:Absorption; Chemical reactions; Computer simulation; Molecular dynamics; Polarization; Polymers; Quantum theory; Reduction; Electronic states; Interfacial polarization; Superficial electrons; Water/air interface; Surface chemistry
Año:2005
Volumen:109
Número:14
Página de inicio:6473
Página de fin:6478
DOI: http://dx.doi.org/10.1021/jp049058g
Título revista:Journal of Physical Chemistry B
Título revista abreviado:J Phys Chem B
ISSN:15206106
CODEN:JPCBF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v109_n14_p6473_Rodriguez

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Citas:

---------- APA ----------
Rodriguez, J. & Laria, D. (2005) . Electronic states at the water/air interface. Journal of Physical Chemistry B, 109(14), 6473-6478.
http://dx.doi.org/10.1021/jp049058g
---------- CHICAGO ----------
Rodriguez, J., Laria, D. "Electronic states at the water/air interface" . Journal of Physical Chemistry B 109, no. 14 (2005) : 6473-6478.
http://dx.doi.org/10.1021/jp049058g
---------- MLA ----------
Rodriguez, J., Laria, D. "Electronic states at the water/air interface" . Journal of Physical Chemistry B, vol. 109, no. 14, 2005, pp. 6473-6478.
http://dx.doi.org/10.1021/jp049058g
---------- VANCOUVER ----------
Rodriguez, J., Laria, D. Electronic states at the water/air interface. J Phys Chem B. 2005;109(14):6473-6478.
http://dx.doi.org/10.1021/jp049058g