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Abstract: Lühmann,
Dirk-Sören, June 2003. Synchrotron radiation based studies of
pyridine, isonicotinic acid and bi-isonicotinic acid in the gas phase:
Gas phase photoelectron spectroscopy of pyridine based aromatic
molecules and proof-of-principle investigation of a Knudsen cell as
vapour source for free molecular spectroscopy of solids and fluids.
Project work (10 pts) at Surface Physics (Physics 5), Department of
Physics, Uppsala University. For the first time, a Knudsen cell was
used as vapour source for free molecular photoelectron spectroscopy
with low volatile fluid or solid substances. Proof-of-principle
experiments have been performed showing that the target densities are
high enough to allow intensive synchrotron radiation based studies of a
wide range of molecules. PES, XPS and NEXAFS were performed on
pyridine, 2,2’-bipyridine and isonicotinic acid. A thermal break-up of
the carboxyl groups of isonicotinic acid and bi-isonicotinic was
observed. Most of the obtained spectra have never been recorded or are
improved comparing to earlier results. All spectra were discussed and
the peaks assigned involving recent theoretical studies.
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