Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules

Details Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...660l.137h&link_type=abstract

The Astrophysical Journal, Volume 660, Issue 2, pp. L137-L140.

Astronomy and Astrophysics

Astronomy

6

Infrared: Ism, Ism: Lines And Bands, Ism: Molecules

Scientific paper

We have obtained 11-15 μm spectra of thin films of hydrogenated amorphous carbon assembled from carbon nanoparticles. Well-defined, narrow features similar to the interstellar emission bands attributed to polycyclic aromatic hydrocarbons (PAHs) are observed at 11.3, 12, 12.8, 13.5, and 14.2 μm. These features are reproduced in many samples prepared under a variety of conditions, indicating that they involve common molecular components. We suggest that these are based on compact ring structures such as coronene, C 24H12, but that these molecules have peripheral substitutions involving additional aromatic rings. They may also be substituted with sp- or sp2-bonded carbon chains. All bands exhibit slight energy shifts in different samples in response to changes in preparation conditions. These shifts replicate variations in wavelength and profile of the 11-15 μm bands seen in different type of emission source. None of the nanoparticle samples exhibit all of the 11.3, 12, 12.8, 13.5, and 14.2 μm features. This implies that the interstellar bands are produced by a limited variety of PAH structures, rather than by a single dominant species.

Affiliated with

Also associated with

No associations

Rating

Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laboratory Simulation of 11-15 μm Spectra Associated with Polycyclic Aromatic Hydrocarbon Molecules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1041234