Study of electrolyte effects on electrochemical synthesis and p-doping of poly(thienyl biphenyl) films

Rose-Marie Latonen, Carita Kvarnström*, Maria Grzeszczuk, Ari Ivaska

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

The electrochemical synthesis and charging–discharging process of a copolymer consisting of 3-octylthiophene (3-OT) and biphenyl units
have been studied in different electrolytic media. The polymer material has been characterized by electrochemical and spectroscopic methods:
cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), chronopotentiometry, chronoamperometry and FTIR
spectroscopy. The diffusion coefficients of different ions in poly(thienyl biphenyl) (PTB) films have been determined by chronoamperometry
and compared with corresponding values in poly(3-octylthiophene) (POT) and poly(paraphenylene) (PPP). The best electrolytic conditions
for synthesis of poly(thienyl biphenyl) concerning the copolymer structure was found to be in 0.1 M lithium hexafluoro arsenate (LiAsF6) in
acetonitrile. In this electrolyte solution, the content of phenylene segments compared to thienylene segments is highest resulting in a higher
degree of cross-linking compared with films made in the presence of the other electrolyte salts studied.
Original languageEnglish
Pages (from-to)257–269
JournalSynthetic Metals
Volume130
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

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