Single Photon Infrared Emission Spectroscopy of the Gas Phase Pyrene Cation: Support for a Polycyclic Aromatic Hydrocarbon Origin of the Unidentified Infrared Emission Bands

Journal Article · Mon Jun 18 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.5691· OSTI ID:40204670

Kim, H -S; Wagner, D R; Saykally, R J

We report the first observation of infrared emission from a gaseous ionic polycyclic aromatic hydrocarbon (PAH), the pyrene cation, over the range of wavelengths spanned by the ubiquitous interstellar unidentified infrared emission bands (UIRs). The complete set of pyrene cation IR emissions is observed, with relative intensities consistent with astrophysical observations, supporting the proposal that ionized PAHs are major contributors to the UIR bands. Additionally, unidentified features possibly arising from dehydrogenated PAH species are noted in the spectrum.

• Sponsoring Organization: (US)
• OSTI ID: 40204670
• Journal Information: Physical Review Letters, Vol. 86, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.86.5691; Othernumber: PRLTAO000086000025005691000001; 065124PRL; PBD: 18 Jun 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CATIONS
EMISSION SPECTROSCOPY
ORIGIN
PHOTONS
POLYCYCLIC AROMATIC HYDROCARBONS
PYRENE
WAVELENGTHS