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  Coulomb Explosion Imaging studies of fundamental molecular structure

Herwig, P. (2015). Coulomb Explosion Imaging studies of fundamental molecular structure. PhD Thesis, Ruprechts-Karls-Universität, Heidelberg.

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 Creators:
Herwig, Philipp1, Author              
Wolf, Andreas, Referee
Jochim, Selim2, Referee
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              
2Universität Heidelberg, ou_persistent22              

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 MPINP: Quantendynamik - Abteilung Blaum
 Abstract: Foil-induced Coulomb explosion imaging is an accurate technique to measure bondlength distributions and geometries of molecules. Two fundamental questions are addressed in this thesis concerning metastable states of the diatomic hydrogen anions H-2 and D-2 and the more complex radical cation C2OH2D+2 of trans-2,3-dideuterooxirane. The measurements on the rotationally stretched and metastable D-2 were preformed to investigate a discrepancy between a nonlocal resonance theory and a previous photofragmentation study. An agreement is found with theory for the calculated wave functions of states with rotational quantum numbers of J = 37 and J = 38 and also the photofragmentation data agree with theory when considering a so far neglected fragmentation channel. The study of the trans-2,3-dideuterooxirane represents the first determination of molecular handedness from an enantiopure sample by direct molecular imaging and reached a statistical significance of 5σ. The structures of chiral molecules are related to different chemical properties, while except for the optical activity their physical properties are the same. The applied enantiopure deuterated oxirane sample was chemically linked to the stereochemical reference standard, realizing the first gas-phase test of the fundamental relation between chemical properties and chiral structure that was arbitrarily chosen by Fischer in 1894.

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Language(s): eng - English
 Dates: 2015-04-29
 Publication Status: Accepted / In Press
 Pages: 140 S.
 Publishing info: Heidelberg : Ruprechts-Karls-Universität
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.17617/2.2227668
 Degree: PhD

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