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- W2891839737 abstract "Copoly(4-dodecyloxyl-3,5-dihydroxymethyl-phenylacetylene/p-pinanyldimethylsilylphenylacetylene) (copoly(1/2)) consist of both the cis-cisoidal sequence of achiral 4-dodecyloxyl-3,5-dihydroxymethyl-phenylacetylene (1) and cis-transoidal sequence of chiral p-pinanyldimethylsilylphenylacetylene (2). The reactivity ratios of 1 and 2 in the copolymerization were estimited as r1 = 1.49 and r2 = 0.50, respectively. By replacing THF (a good solvent) of copoly(1/2) solution with methanol (a poor solvent) gradually by concentration-driven permeation through a membrane for several times, stepwise increase in the CD intensity at 308 nm arisen from the cis-cisoidal main-chain was observed. The local chirality in chiral 2 units was successfully transmitted to the cis-cisoidal sequence of achiral 1. Even when the molar ratio of 1/2 reaches 50, this method of the multiple-stage-solvent-exchange is still effective for transmitting the local chirality in 2 to the cis-cisoidal sequence 1 in the copolymer. Directly adding methanol to the copoly(1/2)'s solution and annealing of copoly(1/2) in THF/methanol could not realize this chiral teletransmission. Hence, this new method of the multiple stage solvent exchange in the copolymer solution through a membrane is suitable and efficient to realize the efficient chirality transmission and amplification in the cis-cisoidal polyacetylene." @default.
- W2891839737 created "2018-09-27" @default.
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- W2891839737 date "2018-10-01" @default.
- W2891839737 modified "2023-09-29" @default.
- W2891839737 title "Chiral teletransmission in the cis-cisoidal sequence of copoly(substituted acetylene)s by multiple stage solvent exchange of the copolymer solution through a membrane" @default.
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- W2891839737 doi "https://doi.org/10.1016/j.polymer.2018.09.023" @default.
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