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• W2024607050 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." @default.
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• W2024607050 date "2002-05-22" @default.
• W2024607050 modified "2023-09-26" @default.
• W2024607050 title "Chiroptical Properties of Poly(<i>p</i><i>-</i>phenyleneethynylene) Copolymers in Thin Films: Large <i>g</i>-Values" @default.
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• W2024607050 doi "https://doi.org/10.1021/ja026532s" @default.
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