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Issue 2, 2012
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Synthesis and characterization of novel polythiophenes with graphene-like structures via intramolecular oxidative coupling

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Abstract

Novel polythiophenes with graphene structures (GPTs) could be synthesized based on intramolecular oxidative coupling of the polythiophene precursors having phenyl groups at the 3-position, poly(3-(4′-(3′′,7′′-dimethyloctoxy)phenyl)thiophene) (P3PhT) and poly(3-hexylthiophene)-b-P3PhT (P3HT-b-P3PhT), using FeCl3 as an oxidative agent. The GPTs were characterized by 1H NMR spectroscopy, UV-vis spectroscopy, FT-IR spectroscopy, cyclic voltammetry and X-ray diffraction. The thin film transistor (TFT) characteristics were also performed for P3HT-b-GPT. The progression of oxidative coupling of P3PhTs was confirmed by 1H NMR and FT-IR spectroscopies. Moreover, GPTs showed significant red-shifts in the UV-vis spectra due to their high coplanarity, extended π-conjugation length, and strong π-stacking formation. P3HT-b-GPT also showed a red-shift in the UV-vis spectra and a reduced band gap as compared to the pristine P3HT. P3HT-b-GPT exhibited hole mobility (∼10−5 cm2 V−1 s−1) which is comparable to that of pristine P3HT having a similar molecular weight.

Graphical abstract: Synthesis and characterization of novel polythiophenes with graphene-like structures via intramolecular oxidative coupling

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Supplementary files

Article information


Submitted
25 Oct 2011
Accepted
07 Nov 2011
First published
13 Dec 2011

Polym. Chem., 2012,3, 479-485
Article type
Paper

Synthesis and characterization of novel polythiophenes with graphene-like structures via intramolecular oxidative coupling

A. Takahashi, C. Lin, K. Ohshimizu, T. Higashihara, W. Chen and M. Ueda, Polym. Chem., 2012, 3, 479
DOI: 10.1039/C1PY00501D

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