Publications [#231998] of David N. Beratan

Journal Articles
  1. Kumar, K; Kurnikov, IV; Beratan, DN; Waldeck, DH; Zimmt, MB, Use of modern electron transfer theories to determine electronic coupling matrix elements in intramolecular systems, Journal of Physical Chemistry A, vol. 102 no. 28 (1998), pp. 5529-5541 [pdf] .

    Abstract:
    The dependence of the donor/acceptor electronic coupling on the topology of donor-bridge-acceptor (DBA) molecules is probed experimentally and theoretically. The temperature dependence of photoinduced electron-transfer rate constants is analyzed with a semiclassical electron-transfer model to extract the donor/acceptor electronic coupling matrix elements |V| and the low-frequency reorganization energy at 295 K, λ0(295 K), for four rigid DBA molecules. The sensitivity of the electronic coupling |V| to the models and parameters used to fit the data are extensively investigated. The treatment of the low-frequency reorganization energy's temperature dependence has a significant impact on the analysis. The identity of the principal coupling pathways is determined for molecular linkages that propagate symmetry allowed donor/acceptor interactions and molecular linkages that propagate symmetry forbidden donor/acceptor interactions. For the symmetry forbidden case, these analyses demonstrate that solvent molecules provide the dominant coupling pathway in the nine-bond bridge, C-shaped molecule 2 but do not significantly influence |V| across the seven-bond, linear bridge in 1.