| Autor: |
Karen E. Connell, Tomas Kurucsev, Bengt Nordén |
| Rok vydání: |
1988 |
| Předmět: |
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| Zdroj: |
Australian Journal of Chemistry. 41:1509 |
| ISSN: |
0004-9425 |
| DOI: |
10.1071/ch9881509 |
| Popis: |
The absorption spectra in the near-ultraviolet region of uracil and thymine, and of their derivatives may be deconvoluted into two vibronic progressions; the higher-energy progression has a relatively low intensity. The corresponding component spectra coincide with the two separate transitions manifested in the circular dichroism of the relevant nucleoside derivatives. A series of apparent contradictions may be resolved by the assumption that the higher-energy transition in absorption is a vibronically allowed (π*,n) transition. This interpretation is further supported by an analysis of the spectra of uridylyl (3′-5′) uridine and thimidylyl (3′-5′) thymidine in terms of exciton interactions. The magnitude of exciton coupling in the dinucleoside phosphates is found to be small but significant in terms of energy transfer rates. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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