One- to Two-Exciton Transitions in Perylene Bisimide Dimer Revealed by Two-Dimensional Electronic Spectroscopy

Bressan, Giovanni, Green, Dale, Chan, Yohan, Bulman Page, Philip C., Jones, Garth A., Meech, Stephen R. and Heisler, Ismael A. (2019) One- to Two-Exciton Transitions in Perylene Bisimide Dimer Revealed by Two-Dimensional Electronic Spectroscopy. The Journal of Physical Chemistry A, 123 (8). 1594–1601. ISSN 1089-5639

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Abstract

The excited-state energy levels of molecular dimers and aggregates play a critical role in their photophysical behavior and an understanding of the photodynamics in such structures is important for developing applications such as photovoltaics and optoelectronic devices. Here, exciton transitions in two different covalently bound PBI dimers are studied by two-dimensional electronic spectroscopy (2DES), a powerful spectroscopic method, providing the most complete picture of vibronic transitions in molecular systems. The data are accurately reproduced using the equation of motion-phase matching approach. The unambiguous presence of one-exciton to two-exciton transitions are captured in our results and described in terms of a molecular exciton energy level scheme based on the Kasha model. Furthermore, the results are supported by comparative measurements with the PBI monomer and another dimer in which the interchromophore distance is increased.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 13 Dec 2018 10:30
Last Modified: 18 Sep 2020 00:19
URI: https://ueaeprints.uea.ac.uk/id/eprint/69290
DOI: 10.1021/acs.jpca.8b11473

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