Studying the Phenylacetylene Cation's Spectrum
Author Information
Author(s): Douglas-Walker Thomas E., Campbell Ewen K., Daly Francis C., Douin Stéphane, Gans Bérenger, Jacovella Ugo, Maurice Colombe, Odant Robin, Palotás Julianna
Primary Institution: School of Chemistry, The University of Edinburgh
Hypothesis
Can helium-tagging and two-color spectroscopy provide accurate laboratory data for comparison with diffuse interstellar bands?
Conclusion
The study shows that the electronic spectrum of the phenylacetylene cation can be accurately measured using various spectroscopic techniques.
Supporting Evidence
- The electronic spectrum of the phenylacetylene cation was recorded using multiple spectroscopic techniques.
- Helium-tagging and two-color spectroscopy provided accurate measurements for comparison with diffuse interstellar bands.
- The study found that the origin band of the phenylacetylene cation is slightly shifted when recorded by helium-tagging.
- Vibronic transitions were observed and assigned based on experimental and calculated data.
- The results indicate that the techniques used can facilitate accurate comparisons to catalogued diffuse interstellar bands.
Takeaway
Scientists are trying to figure out what molecules are in space by studying their light. They found a way to look at a special molecule called phenylacetylene to help understand this better.
Methodology
The study used helium-tagging, two-color resonant-enhanced photodissociation spectroscopy, and cavity ring-down spectroscopy to measure the electronic spectrum of the phenylacetylene cation.
Limitations
The study's findings may not fully represent the behavior of larger molecules or those that are more resistant to fragmentation.
Digital Object Identifier (DOI)
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