Conductivity, interaction and solubility of hetero-bifunctional end-capped beta,beta'-dihexylsubstituted sexithiophenes

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Pernilla Sund, Fredrik Pettersson, Ronald Österbacka, Carl‐Eric Wilén
Publisher: WILEY
Publication year: 2018
Journal: Journal of Applied Polymer Science
Journal acronym: J APPL POLYM SCI
Volume number: 135
Issue number: 43
Number of pages: 6
ISSN: 0021-8995


Three ,'-dihexylsexithiophenes were synthesized, one without end group modification (T6.1), one with dialdehyde (T6.2) and one with diester (T6.3) end-capping. Their properties were investigated by cyclic voltammetry and Ultraviolet-visible spectroscopy, and it was found that while they were nonconducting in undoped form, the conductivity reached 0.001Scm(-1) (T6.1), 0.017Scm(-1) (T6.2), and 0.003Scm(-1) (T6.3) when doped with iodine vapor. The solubilities of T6.2 and T6.3 in chloroform were excellent, whereas the solubility of T6.1 was low and in line with earlier literature values. Moreover, the studies revealed that T6.2 is also highly soluble in tetrahydrofuran. For the dialdehyde end-capped ,'-dihexylsexithiophene T6.2 association constants for self-association in chloroform and with silica were determined to be 1.6 and 2.3 (mol/kg)(-1), respectively. In contrast, the two other oligothiophenes did not show such associations.

Last updated on 2020-28-01 at 05:07