Exciton–exciton annihilation as a probe of interchain interactions in PPV–oligomer aggregates
Abstract
One measure of exciton mobility in an aggregate is the efficiency of exciton–exciton annihilation (EEA). Both exciton mobilities and EEA are enhanced for aggregate morphologies in which the distances between chromophores and their relative orientations are favorable for Förster energy transfer. Here this principle is applied to gauge the strength of interchain interactions in aggregates of two substituted PPV oligomers of 7 (OPPV7) and 13 (OPPV13) phenylene rings. These are models of the semiconducting conjugated polymer MEH–PPV. The aggregates were formed by adding a poor solvent (methanol or water) to the oligomers dissolved in a good solvent. Aggregates formed from the longer-chain oligomer and/or by addition of the more polar solvent showed the largest contribution of EEA in their emission decay dynamics. This was found to correlate with the degree to which the steady-state emission spectrum of the monomer is altered by aggregation. Furthermore, the wavelength dependence of the EEA signal was also shown to be useful in differentiating emission features due to monomeric and aggregated chains when their spectra overlap significantly.
- Authors:
-
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States); New Mexico Tech, Socorro, NM (United States)
- Zernike Institute of Advanced Materials, AG Groningen (The Netherlands)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1368672
- Report Number(s):
- BNL-114012-2017-JA
Journal ID: ISSN 1520-6106; KC0403020
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry. B
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 7; Journal ID: ISSN 1520-6106
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Center for Functional Nanomaterials
Citation Formats
Peteanu, Linda A., Chowdhury, Sanchari, Wildeman, Jurjen, and Sfeir, Matthew Y. Exciton–exciton annihilation as a probe of interchain interactions in PPV–oligomer aggregates. United States: N. p., 2017.
Web. doi:10.1021/acs.jpcb.6b11250.
Peteanu, Linda A., Chowdhury, Sanchari, Wildeman, Jurjen, & Sfeir, Matthew Y. Exciton–exciton annihilation as a probe of interchain interactions in PPV–oligomer aggregates. United States. https://doi.org/10.1021/acs.jpcb.6b11250
Peteanu, Linda A., Chowdhury, Sanchari, Wildeman, Jurjen, and Sfeir, Matthew Y. Fri .
"Exciton–exciton annihilation as a probe of interchain interactions in PPV–oligomer aggregates". United States. https://doi.org/10.1021/acs.jpcb.6b11250. https://www.osti.gov/servlets/purl/1368672.
@article{osti_1368672,
title = {Exciton–exciton annihilation as a probe of interchain interactions in PPV–oligomer aggregates},
author = {Peteanu, Linda A. and Chowdhury, Sanchari and Wildeman, Jurjen and Sfeir, Matthew Y.},
abstractNote = {One measure of exciton mobility in an aggregate is the efficiency of exciton–exciton annihilation (EEA). Both exciton mobilities and EEA are enhanced for aggregate morphologies in which the distances between chromophores and their relative orientations are favorable for Förster energy transfer. Here this principle is applied to gauge the strength of interchain interactions in aggregates of two substituted PPV oligomers of 7 (OPPV7) and 13 (OPPV13) phenylene rings. These are models of the semiconducting conjugated polymer MEH–PPV. The aggregates were formed by adding a poor solvent (methanol or water) to the oligomers dissolved in a good solvent. Aggregates formed from the longer-chain oligomer and/or by addition of the more polar solvent showed the largest contribution of EEA in their emission decay dynamics. This was found to correlate with the degree to which the steady-state emission spectrum of the monomer is altered by aggregation. Furthermore, the wavelength dependence of the EEA signal was also shown to be useful in differentiating emission features due to monomeric and aggregated chains when their spectra overlap significantly.},
doi = {10.1021/acs.jpcb.6b11250},
journal = {Journal of Physical Chemistry. B},
number = 7,
volume = 121,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2017},
month = {Fri Jan 20 00:00:00 EST 2017}
}
Web of Science
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