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    题名: Aggregation of Conjugated Polymers in Aromatic Solvent
    作者: Rahman,MH;Liao,SC;Chen,HL;Chen,JH;Ivanov,VA;Chu,PPJ;Chen,SA
    贡献者: 中央大學
    关键词: FIELD-EFFECT TRANSISTORS;BLUE POLARIZED ELECTROLUMINESCENCE;BETA-PHASE FORMATION;SIDE-CHAIN LENGTH;SELF-ORGANIZATION;SOLAR-CELLS;POLYFLUORENES;ALIGNMENT;POLY(9;9-DIOCTYLFLUORENE);TRANSPORT
    日期: 2009
    上传时间: 2010-06-29 19:44:47 (UTC+8)
    出版者: 化學研究所
    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 pi-pi 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.
    關聯: LANGMUIR
    显示于类别:[化學研究所] 期刊論文

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