TY  - JOUR
AU  - Maris, A.
AU  - Melandri, S.
AU  - Evangelisti, L.
AU  - Caminati, W.
AU  - Giuliano, B. M.
AU  - Plekan, O.
AU  - Feyer, V.
AU  - Richter, R.
AU  - Coreno, M.
AU  - Prince, K. C.
TI  - Soft X-ray photoemission spectroscopy of selected neurotransmitters in the gas phase
JO  - Journal of electron spectroscopy and related phenomena
VL  - 185
SN  - 0368-2048
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - PreJuSER-112075
SP  - S244 - S251
PY  - 2012
N1  - We gratefully acknowledge the assistance of our colleagues at Elettra for providing good quality synchrotron light. B.M.G. thanks FCT for financial support (SFRH/BPD/44689/2008). A. Maris thanks N. Kosugi for sharing his GSCF3 program with us and for essential discussions on its use.
AB  - The valence molecular orbitals and core levels of tyramine, tryptamine and tryptophol in the gas phase have been studied using X-ray photoelectron spectroscopy (XPS) and theoretical methods. The energies of the outer valence region spectrum are found to be in agreement with previously reported He I spectra, while new data on the inner valence molecular orbitals are reported. The structures in the carbon, nitrogen and oxygen core level spectra of these molecules have been identified and assigned. These compounds are characterised by conformers with hydrogen bonding in which the pi systems of the phenol and indole groups act as hydrogen acceptors, but a spectroscopic signature of this hydrogen bond was not observed. This is in contrast with our previous spectra of amino acids, where conformers with specific hydrogen bonding showed strong effects in core level spectra. We attribute the difference to the weaker strength of the pi-hydrogen bonding. (C) 2012 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000308627700009
DO  - DOI:10.1016/j.elspec.2012.06.007
UR  - https://juser.fz-juelich.de/record/112075
ER  -