Leah C. O'Brien
, Southern Illinois University (Edwardsville)
Research this year has focused
on the spectroscopy of several gas-phase, diatomic molecules, including PtF and
We have recorded the
Doppler-limited spectrum of gas phase PtF resolution in the 11400 cm-1
– 13000 cm-1. The spectra are recorded using intracavity laser
absorption spectroscopy (ILS) located at UM-St. Louis in the laboratory of our
collaborator, Prof. James O'Brien. Two bands of a new electronic
transition of PtF were observed with bandheads at 12523 and 13079 cm-1.
The vibrational numbering of these band are assigned as the (0,0) and (1,0) band,
respectively, based on the isotopologue structure. The analysis of these bands
are in progress.
continued on other projects including O2. A portion of the (1,1)
band of the b1Σ+ - X3Σ–
transition of O2 is shown in the figure. Improved line positions and
improved molecular parameters for the v=1 band of the b1Σ+
state have been determined. Additionally, a new method of producing
vibrationally hot molecules for use in absorption spectroscopy of stable gas
phase molecules is described.
The ACS-PRF award supports our
research and positively impacts our careers by providing funding for research
supplies, travel for conferences, and salary for summer work. Gas-phase
diatomic molecules can be important in many atmospheric and catalytic reactions.
This research provides new and/or improved molecular constants for electronic
states, which in turn provide insight into the electronic structure and bonding
of these molecules.