Abstract
A simple and efficient scheme, the fragment charge difference (FCD) method, for estimating the electronic coupling matrix elements in charge transfer systems was established. The method and its simplified variant at the Hartree-Fock level were applied to several DNA related systems to estimate the electronic coupling in π-stacks of Watson-Crick pair dimers and trimers. The results were compared to those obtained with the generalized Mulliken-Hush procedure (GMH). It was found that both methods, GMH and FCD, effectively treat simultaneously several donor-acceptor sites in DNA fragments where two-state models fail.
Original language | English |
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Pages (from-to) | 5607-5616 |
Number of pages | 10 |
Journal | Journal of Chemical Physics |
Volume | 117 |
Issue number | 12 |
DOIs | |
State | Published - 22 Sep 2002 |