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Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers

[Image: see text] Conjugated polymers are complex multichromophore systems, with emission properties strongly dependent on the electronic energy transfer through active subunits. Although the packing of the conjugated chains in the solid state is known to be a key factor to tailor the electronic ene...

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Autores principales: Camposeo, Andrea, Pensack, Ryan D., Moffa, Maria, Fasano, Vito, Altamura, Davide, Giannini, Cinzia, Pisignano, Dario, Scholes, Gregory D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2016
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5133673/
https://www.ncbi.nlm.nih.gov/pubmed/27933935
http://dx.doi.org/10.1021/jacs.6b10761
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author Camposeo, Andrea
Pensack, Ryan D.
Moffa, Maria
Fasano, Vito
Altamura, Davide
Giannini, Cinzia
Pisignano, Dario
Scholes, Gregory D.
author_facet Camposeo, Andrea
Pensack, Ryan D.
Moffa, Maria
Fasano, Vito
Altamura, Davide
Giannini, Cinzia
Pisignano, Dario
Scholes, Gregory D.
author_sort Camposeo, Andrea
collection PubMed
description [Image: see text] Conjugated polymers are complex multichromophore systems, with emission properties strongly dependent on the electronic energy transfer through active subunits. Although the packing of the conjugated chains in the solid state is known to be a key factor to tailor the electronic energy transfer and the resulting optical properties, most of the current solution-based processing methods do not allow for effectively controlling the molecular order, thus making the full unveiling of energy transfer mechanisms very complex. Here we report on conjugated polymer fibers with tailored internal molecular order, leading to a significant enhancement of the emission quantum yield. Steady state and femtosecond time-resolved polarized spectroscopies evidence that excitation is directed toward those chromophores oriented along the fiber axis, on a typical time scale of picoseconds. These aligned and more extended chromophores, resulting from the high stretching rate and electric field applied during the fiber spinning process, lead to improved emission properties. Conjugated polymer fibers are relevant to develop optoelectronic plastic devices with enhanced and anisotropic properties.
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spelling pubmed-51336732016-12-05 Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers Camposeo, Andrea Pensack, Ryan D. Moffa, Maria Fasano, Vito Altamura, Davide Giannini, Cinzia Pisignano, Dario Scholes, Gregory D. J Am Chem Soc [Image: see text] Conjugated polymers are complex multichromophore systems, with emission properties strongly dependent on the electronic energy transfer through active subunits. Although the packing of the conjugated chains in the solid state is known to be a key factor to tailor the electronic energy transfer and the resulting optical properties, most of the current solution-based processing methods do not allow for effectively controlling the molecular order, thus making the full unveiling of energy transfer mechanisms very complex. Here we report on conjugated polymer fibers with tailored internal molecular order, leading to a significant enhancement of the emission quantum yield. Steady state and femtosecond time-resolved polarized spectroscopies evidence that excitation is directed toward those chromophores oriented along the fiber axis, on a typical time scale of picoseconds. These aligned and more extended chromophores, resulting from the high stretching rate and electric field applied during the fiber spinning process, lead to improved emission properties. Conjugated polymer fibers are relevant to develop optoelectronic plastic devices with enhanced and anisotropic properties. American Chemical Society 2016-11-17 2016-11-30 /pmc/articles/PMC5133673/ /pubmed/27933935 http://dx.doi.org/10.1021/jacs.6b10761 Text en Copyright © 2016 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Camposeo, Andrea
Pensack, Ryan D.
Moffa, Maria
Fasano, Vito
Altamura, Davide
Giannini, Cinzia
Pisignano, Dario
Scholes, Gregory D.
Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title_full Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title_fullStr Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title_full_unstemmed Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title_short Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers
title_sort anisotropic conjugated polymer chain conformation tailors the energy migration in nanofibers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5133673/
https://www.ncbi.nlm.nih.gov/pubmed/27933935
http://dx.doi.org/10.1021/jacs.6b10761
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