期刊
MACROMOLECULES
卷 43, 期 18, 页码 7611-7616出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma1013258
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资金
- DFG [SFB 840]
- Elite network Bavaria
We report the quantitative conversion of bromine end groups in regioregular poly(3-hexylthiophene)s (P3HTs) and the characterization of the resulting monocarboxylated P3HTs (P3HT-COOHs) carrying one carboxylic acid group at their chain ends. The monocarboxylation for three different chain lengths is carried out, and the resulting P3HT-COOHs arc characterized with size exclusion chromatography, matrix-assisted laser desorption ionization spectroscopy with time-of-flight detection mass spectroscopy, and UV-vis spectroscopy. The thermal properties and crystallinity in bulk and thin films were studied in a comparison between P3HT and P3HT-COOHs. Differential scanning calorimetry and wide-angle X-ray scattering support the increasing crystallinity for the higher molecular weight samples. Preliminary OFET measurements show a good charge carrier mobility in the range of 10(-3) cm(2)/(V s) for P3HT-COOHs with molecular weights of 5000 and 10800 g/mol.
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