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Investigation of Intramolecular Through-Space Charge-Transfer States in Donor–Acceptor Charge-Transfer Systems

Kumar, Shiv; Gomes Franca, Larissa; Stavrou, Kleitos; Crovini, Ettore; Cordes, David B.; Slawin, Alexandra M.Z.; Monkman, Andrew P.; Zysman-Colman, Eli

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Authors

Shiv Kumar

Ettore Crovini

David B. Cordes

Alexandra M.Z. Slawin

Eli Zysman-Colman



Abstract

Commonly, thermally activated delayed fluorescence (TADF) emitters present a twisted donor–acceptor structure. Here, electronic communication is mediated through-bond via π-conjugation between donor and acceptor groups. A second class of TADF emitters are those where electronic communication between donor and acceptor moieties is mediated through-space. In these through-space charge-transfer (TSCT) architectures, the donor and acceptor groups are disposed in a pseudocofacial orientation and linked via a bridging group that is typically an arene (or heteroarene). In most of these systems, there is no direct evidence that the TSCT is the dominant contributor to the communication between the donor and acceptor. Herein we investigate the interplay between through-bond localized excited (LE) and charge-transfer (CT) states and the TSCT in a rationally designed emitter, TPA-ace-TRZ, and a family of model compounds. From our photophysical studies, TSCT TADF in TPA-ace-TRZ is unambiguously confirmed and supported by theoretical modeling.

Citation

Kumar, S., Gomes Franca, L., Stavrou, K., Crovini, E., Cordes, D. B., Slawin, A. M., Monkman, A. P., & Zysman-Colman, E. (2021). Investigation of Intramolecular Through-Space Charge-Transfer States in Donor–Acceptor Charge-Transfer Systems. Journal of Physical Chemistry Letters, 12(11), https://doi.org/10.1021/acs.jpclett.1c00265

Journal Article Type Article
Acceptance Date Mar 4, 2021
Online Publication Date Mar 15, 2021
Publication Date 2021
Deposit Date Nov 16, 2021
Publicly Available Date Nov 16, 2021
Journal The Journal of Physical Chemistry Letters
Electronic ISSN 1948-7185
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 12
Issue 11
DOI https://doi.org/10.1021/acs.jpclett.1c00265
Public URL https://durham-repository.worktribe.com/output/1224693

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http://creativecommons.org/licenses/by/4.0/

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