title: Local Field Factors and Dielectric Properties of Liquid Benzene.
abstract: Local electric field factors are calculated for liquid benzene by combining molecular dynamic simulations with a subsequent force-field model based on a combined charge-transfer and point-dipole interaction model for the local field factor. The local field factor is obtained as a linear response of the local field to an external electric field, and the response is calculated at frequencies through the first absorption maximum. It is found that the largest static local field factor is around 2.4, while it is around 6.4 at the absorption frequency. The linear susceptibility, the dielectric constant, and the first absorption maximum of liquid benzene are also studied. The electronic contribution to the dielectric constant is around 2.3 at zero frequency, in good agreement with the experimental value around 2.2, while it increases to 6.3 at the absorption frequency. The π → π* excitation energy is around 6.0 eV, as compared to the gas-phase value of around 6.3 eV, while the experimental values are 6.5 and 6.9 eV for the liquid and gas phase, respectively, demonstrating that the gas-to-liquid shift is well-described.
authors.affiliation: Department of Chemistry, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway.
authors.forename: Nazanin
authors.initials: N
authors.lastname: Davari
authors.affiliation: Department of Chemistry, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway.
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Daub
authors.affiliation: Department of Chemistry, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway.
authors.forename: Per-Olof
authors.initials: PO
authors.lastname: Åstrand
authors.affiliation: ABB Corporate Research , SE-72178 Västerås, Sweden.
authors.forename: Mikael
authors.initials: M
authors.lastname: Unge