Excited states of isoxazole molecules studied by electron energy-loss spectroscopy

Ireneusz Linert; Mariusz Zubek

doi:10.1016/j.elspec.2020.146981

Excited states of isoxazole molecules studied by electron energy-loss spectroscopy

Abstract

Electron energy-loss spectra were measured in isoxazole in the excitation energy range 3.5−10 eV to investigate the valence excited states. Spectra recorded at different scattering conditions enabled the identification of the singlet and triplet states and the determination of their vertical excitation energies. The two lowest energy triplet bands, ππ* 13A' and ππ* 23A' at 4.20 and 5.30 eV, respectively show vibrational progressions. The first triplet state, 15a'π* 13A” that involves excitation from the nitrogen lone-pair orbital is observed at 5.68 eV. The three singlet valence states, ππ* 11A', nNπ* 11A” and ππ* 21A' are observed at 5.96, 6.49 and 6.88 eV, respectively in accord with the absorption measurements. Resonance excitation of the triplet and singlet states was noticed.

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Keywords

ELECTRONIC STATES ISOXAZOLE ENERGY-LOSS EXCITATION ENERGY TRIPLET STATES

Details

Category:: Articles
Type:: artykuły w czasopismach
Published in:: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA no. 243,
ISSN: 0368-2048
Language:: English
Publication year:: 2020
Bibliographic description:: Linert I., Zubek M.: Excited states of isoxazole molecules studied by electron energy-loss spectroscopy// JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA -Vol. 243, (2020), s.146981-
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.elspec.2020.146981
Verified by:: Gdańsk University of Technology