eprintid: 17786 rev_number: 23 userid: 1419 dir: disk0/00/01/77/86 datestamp: 2013-03-19 18:08:09 lastmod: 2021-06-12 23:55:26 status_changed: 2013-03-19 18:08:09 type: article metadata_visibility: show item_issues_count: 0 eprint_status: archive creators_name: Goldmann, E creators_name: Asher, SA creators_name: Mukamel, S creators_email: creators_email: asher@pitt.edu creators_email: creators_id: creators_id: ASHER creators_id: title: Electronic excitations of polyalanine; test of the independent chromophore approximation ispublished: pub divisions: sch_as_chemistry full_text_status: public abstract: Optical spectra of polyalanine in the W(nπ*) and NV1(ππ*) 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. date: 2001-01-01 date_type: published publication: Physical Chemistry Chemical Physics volume: 3 number: 14 pagerange: 2893 - 2903 refereed: TRUE issn: 1463-9076 id_number: 10.1039/b101083m citation: Goldmann, E and Asher, SA and Mukamel, S (2001) Electronic excitations of polyalanine; test of the independent chromophore approximation. Physical Chemistry Chemical Physics, 3 (14). 2893 - 2903. ISSN 1463-9076 document_url: http://d-scholarship-dev.library.pitt.edu/17786/1/licence.txt