Synthesis and Properties of Alkoxy-substituted Oligothiophene Derivatives

Three oligothiophenes containing alkoxy groups were synthesized, and their optical, electrochemical, and electrical properties were investigated. The oligothiophenes were soluble in common organic solvents owing to the presence of flexible alkyl chains in their alkoxy groups. The introduction of alk...

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Bibliographic Details
Published inJournal of Photopolymer Science and Technology Vol. 33; no. 4; pp. 373 - 380
Main Authors Imae, Ichiro, Akiyama, Yuki, Harima, Yutaka
Format Journal Article
LanguageEnglish
Published Hiratsuka The Society of Photopolymer Science and Technology(SPST) 01.07.2020
Japan Science and Technology Agency
Subjects
Alkoxy group
Chalcogen atoms interaction
Conjugation
Doppler effect
Electrical properties
Electrical resistivity
In-situ conductivity measurements
Oligothiophene
Optical properties
Oxidation
Red shift
Well-defined structure
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Summary:Three oligothiophenes containing alkoxy groups were synthesized, and their optical, electrochemical, and electrical properties were investigated. The oligothiophenes were soluble in common organic solvents owing to the presence of flexible alkyl chains in their alkoxy groups. The introduction of alkoxy groups induced a red-shift in the absorption and emission bands and a negative shift in the oxidation potentials observed for the compounds. The extension of the π-conjugation system enhanced the stability of the oxidized states of the oligothiophenes due to a reduction in the Coulombic repulsion. The electrochemically oxidized dodecathiophene showed excellent electrical conductivity.
ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.33.373