UV photoelectron studies of biological pyrimidines: the valence electronic structure of methyl substituted uracils
1976; Elsevier BV; Volume: 41; Issue: 2 Linguagem: Inglês
10.1016/0009-2614(76)80810-x
ISSN1873-4448
AutoresA. Padva, Timothy J. O’Donnell, Pierre Lebreton,
Tópico(s)Nonlinear Optical Materials Research
ResumoUV photoelectron spectroscopy and INDO molecular orbital calculations have been employed to investigate the electronic structure of several methyl substituted uracils. The results indicate that the ionization potential of uracils is most sensitive to perturbation at the 1 and 5 positions. Substitution occurs in both of these positions in biological systems. It is also found that the large (0.4 eV) differences in the ionization potential of uracil and thymine is conserved in the nucleoside models 1-methyluracil and 1-methylthymine.
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