Aggregation of conjugated polymers in aromatic solvent

M. Habibur Rahman, Shao Ching Liao, Hsin Lung Chen, Jean Hong Chen, Viktor A. Ivanov, Peter P.J. Chu, Show An Chen

研究成果: 雜誌貢獻期刊論文同行評審

32 引文 斯高帕斯(Scopus)

摘要

Segments of conjugated polymers display the propensity to aggregate in solutions with common organic solvents. Here we revealed that the segmental aggregation of a conjugated polymer, poly(9,9-bis(2-ethylhexyl)fluorene-2,7- diyl), (PF2/6), in toluene was stabilized by the polymer-solvent complex formation through π-π stacking induction of solvent molecules and polymer segments. In this case, a portion of the solvent was trapped inside the aggregate domains upon bringing the system to the subambient temperatures. The residence time of these associated solvent molecules became long enough to yield a separate upfield-shifted NMR resonance. The line-shape of this resonance revealed alignment of the polymer segments in the aggregates. A portion of the solvent was frozen in the compact structure due to the formation of strong polymer-solvent complex.

原文???core.languages.en_GB???
頁(從 - 到)1667-1674
頁數8
期刊Langmuir
25
發行號3
DOIs
出版狀態已出版 - 3 2月 2009

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