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Excitation and Emission Spectra of Jet-Cooled Naphthylmethyl Radicals

2011; American Chemical Society; Volume: 115; Issue: 27 Linguagem: Inglês

10.1021/jp203638h

1520-5215

Nahid Chalyavi, Tyler P. Troy, Masakazu Nakajima, Bligh A. Gibson, Klaas Nauta, R. Sharp, Scott H. Kable, Timothy W. Schmidt,

Astrophysics and Star Formation Studies

Gas phase excitation and emission spectra of three naphthylmethyl radical chromophores are presented. These resonance-stabilized species, 1-naphthylmethyl, 2-naphthylmethyl, and α-acenaphthenyl, each possessing an sp2 carbon adjacent to a naphthalene moiety, are studied by resonant two-color two-photon ionization, laser induced fluorescence, and dispersed fluorescence spectroscopy. Identification of the radicals is made through a combination of dispersed fluorescence and density functional theory calculations. All three species possess spectra in the 580 nm region. The possible relevance to unidentified spectroscopic features such as the diffuse interstellar bands and emission from the Red Rectangle nebula is discussed.