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Report No.

Soft X-ray emission spectroscopy of polycyclic aromatic hydrocarbons

Muramatsu, Yasuji; Tomizawa, Kana; Denlinger, J. D.*; Perera, R. C. C.*

High-resolution CK X-ray emission spectra of polycyclic aromatic hydrocarbons (PAH) were measured using synchrotron radiation. The main peak energies in the PAH X-ray spectra shifted to a higher energy region as the ratio of hydrogenated outer carbon atoms to the non-hydrogenated inner carbon atoms increased. Discrete variational (DV)-X$$alpha$$ molecular orbital calculations provided theoretical confirmation that the spectral features depend on the ratio of hydrogenated/non-hydrogenated carbon atoms, which suggests that the features around the main peaks provide the information of the degree of hydrogenation in PAH compounds.



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