Naslov
Electronic absorption spectra of hydrogenated protonated naphthalene and proflavine

Autori
Bonaca, Ana ; Bilalbegović, Goranka

Izvornik
Monthly notices of the Royal Astronomical Society (0035-8711) 416 (2011), 2; 1509-1513

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
interstellar medium; naphthalene; proflavine; density functional theory; time-dependent density functional theory; optical spectra; diffuse interstellar bands

Sažetak
We study hydrogenated cations of two polycyclic hydrocarbon molecules as models of hydrogenated organic species that form in the interstellar medium. Optical spectra of the hydrogenated naphthalene cation Hn-C10H8^+ for n=1, 2, and 10, as well as of the astrobiologically interesting hydrogenated proflavine cation Hn-C13H11N3^+ for n=1 and 14, are calculated. The pseudopotential time dependent density functional theory is used. It is found that the fully hydrogenated proflavine cation H14-C13H11N3^+ shows a broad spectrum where positions of individual lines are almost lost. The positions of lines, their shapes, and intensities change in hydronaphthalene and hydroproflavine cations showing that hydrogen additions induce substantially different optical spectra in a comparison to base polycyclic hydrocarbon cations. One calculated line in the visible spectrum of H10-C10H8^+, and one in the visible spectrum of H-C13H11N3^+ are close to the measured diffuse interstellar bands. We also present positions of near-UV lines.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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