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- W2046335126 abstract "The palladium-catalyzed three-component coupling polymerization of p-bromophenylallene and a chiral nucleophile, sodium di-(−)-menthyl methylmalonate, was carried out to give a derivative of poly(p-phenylene-vinylene) having chiral substituents on each vinylene unit. For example, a polymer (Mn = 4800, Mw/Mn = 1.6) was obtained in a high yield by the polymerization in 1,4-dioxane at 80 °C for 24 h in the presence of Pd(OAc)2/4P(o-tolyl)3 catalyst. The obtained polymer is soluble in common organic solvents and supposed to have a single-handed helical conformation on the basis of its circular dichroism (CD) spectrum which exhibited a clear Cotton effect within the range of its π−π* transition absorption (λ = 250−400 nm). The nature of the chiral higher-order structure of the polymer was studied in detail by the dependence of the CD spectra of the polymer on the molecular weight and on the character of the solvents." @default.
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- W2046335126 date "2007-11-21" @default.
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- W2046335126 title "Synthesis of Poly(<i>p</i>-phenylene-vinylene) with Chiral Higher-Order Structure from Simple Monomers by Three-Component Coupling Polymerization" @default.
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- W2046335126 doi "https://doi.org/10.1021/ma0716579" @default.
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