| Autor: |
Burin AL; Tulane University, New Orleans, Louisiana 70118, USADepartment of Chemistry, Northwestern University, Evanston, Illinois 60208, USA., Dickman JA, Uskov DB, Hebbard CF, Schatz GC |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of chemical physics [J Chem Phys] 2008 Sep 07; Vol. 129 (9), pp. 091102. |
| DOI: |
10.1063/1.2977727 |
| Abstrakt: |
We investigate the effect of exciton coupling on the optical absorption spectra of polymer molecules under conditions of strong inhomogeneous broadening. It is shown that the dependence of the maximum in the rescaled absorption spectrum on the number of monomers is determined by their resonant exciton coupling and is insensitive to inhomogeneous broadening. Thus the absorption spectrum can be used to determine optical interactions between monomers. Using our theory and semiempirical calculations we determine exciton coupling between adjacent AT pairs in DNA to be 0.04 eV and discuss exciton localization in DNA hairpins composed of AT pairs. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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