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Threshold ionization spectroscopic investigation of supersonic jet-cooled, laser-desorbed Tryptophan

Authors :
Antonio Armentano
Klaus Müller-Dethlefs
Mehran Taherkhani
Jiří Černý
Source :
Taherkhani, M, Armentano, A, Cern, J & Muller-Dethlefs, K 2016, ' Threshold ionization spectroscopic investigation of supersonic jet-cooled, laser-desorbed Tryptophan ', Chemical Physics Letters, vol. 657, pp. 142-147 . https://doi.org/10.1016/j.cplett.2016.05.061
Publication Year :
2016

Abstract

Tryptophan (Trp) was studied by two-colour Photoionization Efficiency (PIE) and Mass Analysed Threshold Ionization (MATI) spectroscopy using a laser desorption apparatus. Conformer A of Trp was excited into the S1 state (34,878 cm−1) and the second laser was scanned around the D0 cation ground and the D1 excited state. No ionization signal into the D0 state could be found, but a clear threshold was observed for the D1 state with an ionization energy of 66,704 ± 3 cm−1 (8.27 eV). This observation is explained in terms of the electronic configurations of the S1 and cationic states.

Details

Database :
OpenAIRE
Journal :
Taherkhani, M, Armentano, A, Cern, J & Muller-Dethlefs, K 2016, ' Threshold ionization spectroscopic investigation of supersonic jet-cooled, laser-desorbed Tryptophan ', Chemical Physics Letters, vol. 657, pp. 142-147 . https://doi.org/10.1016/j.cplett.2016.05.061
Accession number :
edsair.doi.dedup.....5f282f7d0eaed70aac1d07cd846b7f31
Full Text :
https://doi.org/10.1016/j.cplett.2016.05.061