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Data for Implicit and explicit host effects on excitons in pentacene derivatives
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Hine, Nicholas, Charlton, Robert J., Fogarty, R. M., Bogatko, S., Zuehlsdorff, T. J., Heeney, M., Horsfield, A. P. and Haynes, Peter D. (2018) Data for Implicit and explicit host effects on excitons in pentacene derivatives. [Dataset]
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Official URL: http://doi.org/10.5281/zenodo.1167847
Abstract
An ab initio study of the effects of implicit and explicit hosts on the excited state properties of pentacene and its nitrogen-based derivatives has been performed using ground state density functional theory (DFT), time-dependent DFT, and ΔSCF. We observe a significant solvatochromic redshift in the excitation energy of the lowest singlet state (S1) of pentacene from inclusion in a p-terphenyl host compared to vacuum; for an explicit host consisting of six nearest neighbour p-terphenyls, we obtain a redshift of 65 meV while a conductor-like polarisable continuum model (CPCM) yields a 78 meV redshift. Comparison is made between the excitonic properties of pentacene and four of its nitrogen-based analogs, 1,8-, 2,9-, 5,12-, and 6,13-diazapentacene with the latter found to be the most distinct due to local distortions in the ground state electronic structure. We observe that a CPCM is insufficient to fully understand the impact of the host due to the presence of a mild charge-transfer (CT) coupling between the chromophore and neighbouring p-terphenyls, a phenomenon which can only be captured using an explicit model. The strength of this CT interaction increases as the nitrogens are brought closer to the central acene ring of pentacene.
Item Type: | Dataset | |||||||||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
Type of Data: | Experimental data | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Exciton theory, Pentacene, Density functionals | |||||||||||||||||||||
Publisher: | University of Warwick, Department of Physics | |||||||||||||||||||||
Official Date: | 6 February 2018 | |||||||||||||||||||||
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Status: | Not Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Media of Output (format): | .dat .out .geom .txt | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Copyright Holders: | University of Warwick | |||||||||||||||||||||
Description: | Data record consists of a data archive file. The data in this file is organised as follows. |
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