Chiroptical properties of poly(p-phenyleneethynylene) copolymers in thin films: Large g-values

James N Wilson, Winfried Steffen, Trent G. McKenzie, Günter Lieser, Masao Oda, Dieter Neher, Uwe H F Bunz

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

A series of chirally substituted poly (p-phenyleneethynylene) copolymers was prepared by alkyne metathesis of mixtures of two different 2,5-dialkyl-1,4-dipropynylbenzenes. One of the monomers was the chiral bis-2,5-(S)-3,7-dimethyloctyl-1,4-dipropynylbenzene, and the second one was an achiral dipropynyl monomer. If the content of chiral monomer is 25-50 mol %, unusually large chiroptical effects, that is, optical dissymmetries, result in absorption (g = -0.38) and emission (g = -0.19) of these copolymers. The large dissymmetries can be explained by a supramolecular ordering of the PPEs into stranded features that are visualized by dark-field transmission electron microscopy. The strands of chirally substituted PPEs display a striated structure that suggests that the whole feature is a single chirally twisted crystallite.

Original languageEnglish
Pages (from-to)6830-6831
Number of pages2
JournalJournal of the American Chemical Society
Volume124
Issue number24
DOIs
StatePublished - Jun 19 2002
Externally publishedYes

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Alkynes
Transmission Electron Microscopy
Copolymers
Monomers
Thin films
Transmission electron microscopy
phenyleneethynylene

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Chiroptical properties of poly(p-phenyleneethynylene) copolymers in thin films : Large g-values. / Wilson, James N; Steffen, Winfried; McKenzie, Trent G.; Lieser, Günter; Oda, Masao; Neher, Dieter; Bunz, Uwe H F.

In: Journal of the American Chemical Society, Vol. 124, No. 24, 19.06.2002, p. 6830-6831.

Research output: Contribution to journalArticle

Wilson, James N ; Steffen, Winfried ; McKenzie, Trent G. ; Lieser, Günter ; Oda, Masao ; Neher, Dieter ; Bunz, Uwe H F. / Chiroptical properties of poly(p-phenyleneethynylene) copolymers in thin films : Large g-values. In: Journal of the American Chemical Society. 2002 ; Vol. 124, No. 24. pp. 6830-6831.
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AU - Neher, Dieter

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