Abstract
Abstract Three chiral phenylacetylenes having an l -amino alcohol residue and two hydroxymethyl groups and an achiral phenylacetylene having two hydroxyl groups and a dodecyl group were copolymerized by using an achiral catalyst ((nbd)Rh + [η 6 -(C 6 H 5 )B − (C 6 H 5 ) 3 ]) (nbd = norbornadiene) to produce copolymers with M w of 0.5 × 10 4 –15.2 × 10 4 . The copolymers exhibited the Cotton effect at wavelengths assignable to the main chain, indicating that the copolymers adopted one-handed helical conformations. Self-supporting membranes of the resulting copolymers were prepared by the solution casting method. We measured the gas permeabilities (CO 2 /N 2 , CO 2 /CH 4 ) of the copolymer membranes. The separation selectivity factor of CO 2 /N 2 was 17.9, and the CO 2 permeability coefficient of CO 2 /N 2 was 77 Barrers.
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