Oligo(p-phenyleneethynylene)-based coil-rod-coil triblock copolymer: Synthesis and controlled self-organization in solution

Kun Li, Liang Guo, Ziqi Liang, Pappannan Thiyagarajan, Qing Wang

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

The self-assembling ability of block copolymers offers an attractive strategy for the organization of π-conjugated polymers. This article reports the synthesis of a coil-rod-coil triblock copolymer consisting of oligo(p-phenyleneethynylene) as the rodlike segment and polystyrene as the coil-like segment. The chemical structure of the afforded triblock copolymer has been fully characterized by various spectroscopic techniques such as NMR, Raman, gel permeation chromatography, differential scanning calorimetry, ultraviolet-visible, and fluorescence spectroscopy. The small-angle neutron scattering and photophysical measurements indicate that this triblock copolymer exhibits unique solvatochromatic behaviors through the interplay of aggregation-induced π-π stacking and planarization of the conjugated backbone. Supramolecular gel nanostructures have been produced via the controlled assembly of the polymer into H-aggregates. It has been demonstrated that the use of the solvent composition to influence chain conformations and thus to manipulate the packing of the conjugated polymer blocks is important for achieving control in the assembly of conducting polymers and associated optical characteristics.

Original languageEnglish (US)
Pages (from-to)6007-6019
Number of pages13
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume43
Issue number23
DOIs
StatePublished - Dec 1 2005

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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