Abstract
A detailed investigation of the ground state and the first excited state of the pyrimidine bases of uracil, cytosine, thymine and their stacked homodimers is carried out by the Extended Hückel method. The first exicted state is shown to be the (see article)-state. The excitation is localized mainly on the C5-C6 bond region. The energy dependence of the ground state and the first excited state of the homodimers on the mutual position of bases is considered. For every dimer a minimum on the exicted state potential curve is found. This fact creates the possibility for the formation of excimer. The obtained data give some reason for the suggestion about participation of the excimer state as a precursor of photodimer.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- MANTIONE M. J., PULLMAN B. SUR LE M'ECANISME DE LA PHOTODIM'ERISATION DE LA THYMINE. Biochim Biophys Acta. 1964 Nov 15;91:387–398. [PubMed] [Google Scholar]
- Meistrich M. L., Drake J. W. Mutagenic effects of thymine dimers in bacteriophage T4. J Mol Biol. 1972 Apr 28;66(1):107–114. doi: 10.1016/s0022-2836(72)80009-3. [DOI] [PubMed] [Google Scholar]
- Meistrich M. L., Lamola A. A., Gabbay E. Sensitized photoinactivation of bacteriophage T4. Photochem Photobiol. 1970 Mar;11(3):169–178. doi: 10.1111/j.1751-1097.1970.tb05985.x. [DOI] [PubMed] [Google Scholar]