Synthesis and folding behaviour of poly(p-phenylene vinylene)-based β-sheet polychromophores

Elizabeth Elacqua, Geoffrey T. Geberth, David A. Vanden Bout, Marcus Weck

Research output: Contribution to journalArticle

Abstract

This contribution describes the design and synthesis of β-sheet-mimicking synthetic polymers comprising distinct poly(p-phenylene vinylene) (PPV) and poly(norbornene) (PNB) backbones with multiple turns. The rod-coil-coil-rod tetrablock copolymers, synthesized using ring-opening metathesis polymerization (ROMP) and featuring orthogonal face-to-face π-π stacking and phenyl/perfluorophenyl interactions, show persistent folding both in bulk and at the single molecule level, irrespective of the number of β-turns. Single molecule polarization studies reveal that the copolymers are more anisotropic than the corresponding homopolymers. Examination of the spectral signatures of the single molecules shows a dominant emissive chromophore in the linked materials compared to the homopolymer. The lack of significant spectral changes of the folded materials along with the existence of a dominant emission spectrum supports the proposed structure of well-aligned, minimally-interacting chromophores. Utilization of this reliably folding, phenyl/perfluorophenyl functionality could provide an extremely useful tool in future functional materials design.

Original languageEnglish (US)
Pages (from-to)2144-2152
Number of pages9
JournalChemical Science
Volume10
Issue number7
DOIs
StatePublished - Jan 1 2019

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ASJC Scopus subject areas

  • Chemistry(all)

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