Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 10, Issue 12, Pages 1648-1657Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b717307e
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We have recorded the electronic spectra of benzo[g,h,i] perylene and coronene and their van der Waals complexes with argon and oxygen with a helium-nanodroplet depletion spectrometer. These molecules differ by the addition of one and two fused benzene rings to perylene, which was previously studied in helium. The coronene spectrum is similar to a previously reported jet-cooled laser-induced fluorescence (LIF) spectrum. The van der Waals complexes with argon and oxygen show different complexation sites and maximum number of adsorbants. We report a vibronically resolved benzo[g,h,i] perylene S-1 <- S-0 spectrum. The spectral lines are split in a similar way to that of several molecules studied before. However, surprisingly, while the van der Waals complexes with argon are free of the splitting, the complexes with oxygen retain the splitting, with increased linewidth and splitting. We could also observe the S-2 <- S-0 origin transition of benzo[g,h,i] perylene which was previously observed by cavity ring down spectroscopy. While in general the two spectra are quite similar, the relative intensities and spectral shifts of several lines
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