@article{pittir17786,
          volume = {3},
          number = {14},
           month = {January},
          author = {E Goldmann and SA Asher and S Mukamel},
           title = {Electronic excitations of polyalanine; test of the independent chromophore approximation},
         journal = {Physical Chemistry Chemical Physics},
           pages = {2893 -- 2903},
            year = {2001},
             url = {http://d-scholarship-dev.library.pitt.edu/17786/},
        abstract = {Optical spectra of polyalanine in the W(n{\ensuremath{\pi}}*) and NV1({\ensuremath{\pi}}{\ensuremath{\pi}}*) bands are calculated using the time-dependent Hartree-Fock technique and the INDO/S Hamiltonian. Examination of the transition density matrices shows that excitations in the NV1 band involve significant charge transfer between nearest and third-nearest neighbor amide groups. Our analysis suggests that the Frenkel exciton Hamiltonian cannot adequately describe the electronic excitations in the NV1 band.}
}