UV Phoelectron Spectra of Biological Xanthines: Theophylline, Theobromine and Caffeine

D. Ajó Centro di Studio per la Fisica delle Macromolecole del CNR, Padova, Italy

M. Biagini Cingi Intituto di Chimica Generale dell Università, Venezia, Italy

I. Fragalá Istituto di Chimica Generale dell Università, Catania, Italy

G. Granozzi Istituto di Chimica Generale dell Università, Padova, Italy

Abstract

Photoelectron spectra of three natural methylated xanthines are discussed by qualitative considerations on the constitutive subunits and the methylation effects. The first band in all three cases can be assigned to enaminic molecular subunit, as in uracil; also the positions of the lone pairs of nitrogen and oxygen atoms are discussed.

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UV Phoelectron Spectra of Biological Xanthines: Theophylline, Theobromine and Caffeine

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UV Phoelectron Spectra of Biological Xanthines: Theophylline, Theobromine and Caffeine

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