Polarons and charge carrier solvation on conjugated carbon chains: A comparative ab initio study

Details Polarons and charge carrier solvation on conjugated carbon chains: A comparative ab initio study Polarons and charge carrier solvation on conjugated carbon chains: A comparative ab initio study

2010-03-27

arxiv.org/abs/1003.5310v1

Physics

Chemical Physics

Scientific paper

We study accommodation of an excess charge carrier on long even-N polyynic oligomers C_{N}H_{2} due to displacements of the underlying carbon lattice and polarization of the surrounding solvent in the context of carrier self-localization into a polaronic state. Spatial patterns of bond-length alternation, excess charge and spin densities are compared as derived with Hartree-Fock and two hybrid-DFT methods (BHandHLYP and B3LYP) in conjunction with the polarizable continuum model. Quite distinct resulting pictures of carrier accommodation are found when contributions from different interactions are analyzed. Solvation robustly acts to promote excess charge localization.

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