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Phenylacetylene and PAH
During the last decades, polycyclic aromatic hydrocarbons (PAHs) and other related aromatic compounds, such as ionized PAHs, have received considerable attention from astronomers, astrobiologists, environmentalists, and the combustion community. In the interstellar medium, PAH like species account for up to 10% of the cosmic carbon budget.
Suspected carriers of UIR (unidentified infrared emission) and DIB (diffuse interstellar bands)
Despite the crucial importance of PAHs, even the formation route of the very first building block of this type of compounds (namely, the phenylacetylene molecule, C6H5CCH) is unknown.
(Kaiser, Angew. Chem. Int. Ed. 2007, 46, 6866 –6869)