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Diarylacetylene monomers having trimethylsilyl groups and other substituents (substituted biphenyl, 1a and 1b; trimethylsilylmethylphenyl, 1c–e) were synthesized and polymerized with TaCl 5 -n-Bu 4 Sn catalyst to produce the corresponding poly(diarylacetylene)s (2a–d). Polymers 2a–c had high molecular weights and were soluble in common organic solvents. Free-standing membranes of 2a–c...
Diarylacetylenes having fluorenyl groups and other substituents (trimethylsilyl, t-butyl, bromine, fluorine) (1a–1) were polymerized with TaCl 5 –n-Bu 4 Sn. Monomers 1a–l produced high molecular weight polymers 2a–l (M w 5.1×10 5 –1.3×10 6 ) in 12–59% yields. All of the polymers were soluble in common organic solvents, and gave tough free-standing membranes...
Novel chiral acetylene monomers bearing carbazole and triphenylamine groups, namely, (S)-3-butyn-2-yl 2-(9-carbazolyl)ethyl carbonate (1) and (S)-3-butyn-2-yl 4-(diphenylamino)benzoate (2) were synthesized, and polymerized with Rh + (nbd)[η 6 -C 6 H 5 B − (C 6 H 5 ) 3 ] catalyst to give the corresponding polymers with moderate molecular...
Novel acetylene monomers containing N-phenyl-substituted carbazole (Cz) and triphenylamine (TPA) groups, namely, 3-ethynyl-9-phenylcarbazole (1) and p-(N,N-diphenylamino)phenylacetylene (2) were synthesized, and polymerized with several Rh-, W-, and Mo-based catalysts. Poly(1) and poly(2) with high number-average molecular weights (15 500–974 000) were obtained in good yields (77–97%), when [(nbd)RhCl]...
The chiroptical properties of poly((S)-N-(3-butynyl)-3-methylpentanamide) (poly(1)) were studied, and the conformation was analyzed. Poly(1) exhibited a large specific rotation and Cotton effect in CHCl 3 , indicating that it took a helical structure with predominantly one-handed screw sense. From liquid state IR spectroscopic analysis along with molecular mechanics and semiempirical molecular...
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