Aggregation of Conjugated Polymers in Aromatic Solvent

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28243

Title:	Aggregation of Conjugated Polymers in Aromatic Solvent
Authors:	Rahman,MH;Liao,SC;Chen,HL;Chen,JH;Ivanov,VA;Chu,PPJ;Chen,SA
Contributors:	中央大學
Keywords:	FIELD-EFFECT TRANSISTORS;BLUE POLARIZED ELECTROLUMINESCENCE;BETA-PHASE FORMATION;SIDE-CHAIN LENGTH;SELF-ORGANIZATION;SOLAR-CELLS;POLYFLUORENES;ALIGNMENT;POLY(9;9-DIOCTYLFLUORENE);TRANSPORT
Date:	2009
Issue Date:	2010-06-29 19:44:47 (UTC+8)
Publisher:	化學研究所
Abstract:	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.
Relation:	LANGMUIR
Appears in Collections:	[Graduate Institute of Chemistry] journal & Dissertation

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