Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers

Abstract Absolute molecular weight values obtained by gel permeation chromatography with multi angle light scattering of PEDOTF8 were approximately 65% of the relative molecular weight values obtained by gel permeation chromatography using polystyrene standards. Both light absorption and molecular w...

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Autores principales:	Shotaro Hayashi, Shin-ichi Yamamoto, Toshio Koizumi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bb420759ffb84db2905ba3836bae073a
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spelling	oai:doaj.org-article:bb420759ffb84db2905ba3836bae073a2021-12-02T11:52:58ZEffects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers10.1038/s41598-017-01132-52045-2322https://doaj.org/article/bb420759ffb84db2905ba3836bae073a2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01132-5https://doaj.org/toc/2045-2322Abstract Absolute molecular weight values obtained by gel permeation chromatography with multi angle light scattering of PEDOTF8 were approximately 65% of the relative molecular weight values obtained by gel permeation chromatography using polystyrene standards. Both light absorption and molecular weight measurements showed the effective conjugation lengths (absolute molecular weight <2600, relative molecular weight <4000, number of EDOT-F8 units: n < ca. 5 unit). The low molecular weight polymers showed higher energy absorption and fluorescence bands. Molecular weight also affected the electrochemical process of the polymer films. The high molecular weight PEDOTF8 (number average molecular weight >70000) showed a higher redox stability than the low molecular weight one. The two polymers with number average molecular weights of 70200 and 40000 retained 65% and 25% of the charge storage capacity after 100 electrochemical scans, respectively. Square-wave potential step absorptiometry measurements of the polymers with number average molecular weights of 70200 and 40000 showed that the optical contrasts remain stable after ca. 55 and three cycles, respectively. The high molecular weight polymer has a high electrochemical stability and would be a good material for optoelectronic devices.Shotaro HayashiShin-ichi YamamotoToshio KoizumiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shotaro Hayashi Shin-ichi Yamamoto Toshio Koizumi Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
description	Abstract Absolute molecular weight values obtained by gel permeation chromatography with multi angle light scattering of PEDOTF8 were approximately 65% of the relative molecular weight values obtained by gel permeation chromatography using polystyrene standards. Both light absorption and molecular weight measurements showed the effective conjugation lengths (absolute molecular weight <2600, relative molecular weight <4000, number of EDOT-F8 units: n < ca. 5 unit). The low molecular weight polymers showed higher energy absorption and fluorescence bands. Molecular weight also affected the electrochemical process of the polymer films. The high molecular weight PEDOTF8 (number average molecular weight >70000) showed a higher redox stability than the low molecular weight one. The two polymers with number average molecular weights of 70200 and 40000 retained 65% and 25% of the charge storage capacity after 100 electrochemical scans, respectively. Square-wave potential step absorptiometry measurements of the polymers with number average molecular weights of 70200 and 40000 showed that the optical contrasts remain stable after ca. 55 and three cycles, respectively. The high molecular weight polymer has a high electrochemical stability and would be a good material for optoelectronic devices.
format	article
author	Shotaro Hayashi Shin-ichi Yamamoto Toshio Koizumi
author_facet	Shotaro Hayashi Shin-ichi Yamamoto Toshio Koizumi
author_sort	Shotaro Hayashi
title	Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
title_short	Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
title_full	Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
title_fullStr	Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
title_full_unstemmed	Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers
title_sort	effects of molecular weight on the optical and electrochemical properties of edot-based π-conjugated polymers
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/bb420759ffb84db2905ba3836bae073a
work_keys_str_mv	AT shotarohayashi effectsofmolecularweightontheopticalandelectrochemicalpropertiesofedotbasedpconjugatedpolymers AT shinichiyamamoto effectsofmolecularweightontheopticalandelectrochemicalpropertiesofedotbasedpconjugatedpolymers AT toshiokoizumi effectsofmolecularweightontheopticalandelectrochemicalpropertiesofedotbasedpconjugatedpolymers
_version_	1718394949385322496

Effects of molecular weight on the optical and electrochemical properties of EDOT-based π-conjugated polymers

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