ausblenden:
Schlagwörter:
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MPINP:
Quantendynamik - Abteilung Blaum
Zusammenfassung:
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.
