X-RAY ABSORPTION SPECTRA OF SOME SMALL POLYATOMIC MOLECULES

K. C. Prince, R. Richter, M. de Simone and M. Coreno
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K. C. Prince: Sincrotrone Trieste, Strada Statale 14, km 163.5, Area Science Park, I-34012 Basovizza (Trieste), Italy
R. Richter: Sincrotrone Trieste, Strada Statale 14, km 163.5, Area Science Park, I-34012 Basovizza (Trieste), Italy
M. de Simone: Università di Roma III ed Unità INFM, Via della Vasca Navale 84, I-00146 Rome, Italy
M. Coreno: INFM-TASC, Laboratorio ELETTRA, I-34012 Trieste, Italy

Surface Review and Letters (SRL), 2002, vol. 09, issue 01, 159-164

Abstract: We report the Near Edge X-ray Absorption Fine Structure Spectra (NEXAFS) of a series of oxygen-containing organic molecules, namely formaldehyde, acetaldehyde, acetone, formic acid, methanol and dimethyl ether (DME), measured with high resolution at the carbon and oxygen edges. A vibrational progression has been observed at the oxygen1s → π*resonance of formaldehyde, indicating that this state is bound with an excited state C=O stretching frequency of 136 meV. The spectra are compared with previous measurements and the applicability of the chromophore concept is tested for the functional groups present in these molecules.

Date: 2002
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DOI: 10.1142/S0218625X02002026

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