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Electronic state spectroscopy of methyl formate probed by high resolution VUV photoabsorption, He(I) photoelectron spectroscopy and ab initio calculations

Nunes, Y.; Martins, G.; Mason, N. J.; Duflot, D.; Hoffmann, S. V.; Delwiche, J.; Hubin-Franskin , M.-J. and Limão-Vieira, P. (2010). Electronic state spectroscopy of methyl formate probed by high resolution VUV photoabsorption, He(I) photoelectron spectroscopy and ab initio calculations. Physical Chemistry Chemical Physics, 12(48) pp. 15734–15743.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1039/c0cp00051e
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Abstract

The first ab initio calculations of the vertical excitation energies and oscillator strengths are presented for the neutral electronic transitions of methyl formate, C2H4O2. The highest resolution VUV photoabsorption spectrum of the molecule yet reported is presented over the wavelength range 115 to 310 nm (10.8 to 4.0 eV) revealing several new spectral features. Valence and Rydberg transitions and their associated vibronic series, observed in the photoabsorption spectrum, have been assigned in accordance with new theoretical results. The calculations have been carried out to determine the excitation energies of the lowest energy ionic states of methyl formate and are compared with a newly recorded He(I) photoelectron spectrum (10.4 to 17.0 eV). New vibrational structure is observed in the first photoelectron band. The photoabsorption cross-sections have been used to calculate the photolysis lifetime of methyl formate in the upper stratosphere (20-50 km).

Item Type: Journal Article
Copyright Holders: 2010 the Owner Societies
ISSN: 1463-9084
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 25354
Depositing User: Astrid Peterkin
Date Deposited: 14 Dec 2010 16:29
Last Modified: 25 Nov 2014 18:40
URI: http://oro.open.ac.uk/id/eprint/25354
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