Polycyclic Aromatic Hydrocarbons as a Source for (N = 4–6) and C<sub>3</sub>H<sub>2</sub> in the Interstellar Medium
Roby Chacko, Shreyak Banhatti, Saroj Barik, G. Aravind
Abstract
Abstract Photoionization and dissociation of anthracene, phenanthrene, and pentacene in the multiphoton regime at 266 nm wavelength were performed. ( n = 4–6) ions were observed as fragments, and their yields as a function of laser intensity were studied. H-migration and “roaming” mechanisms leading to the formation of these fluxional ions from polycyclic aromatic hydrocarbons (PAHs) are proposed. The present results show higher photostability of PAHs with bent structure and suggest PAHs in the UV regions of interstellar medium as a prominent source for ( n = 4–6).
Topics & Concepts
PhenanthreneAnthracenePhysicsPolycyclic aromatic hydrocarbonPentaceneInterstellar mediumPhotoionizationIonAstrochemistryDissociation (chemistry)PhotochemistryAtomic physicsIonizationAstrophysicsPhysical chemistryChemistryGalaxyAstrobiologyElectrodeThin-film transistorQuantum mechanicsAstrophysics and Star Formation StudiesAdvanced Chemical Physics StudiesMolecular Spectroscopy and Structure