Sequence-regulated copolymerization based on periodic covalent positioning of monomers along one-dimensional nanochannels

Shuto Mochizuki, Naoki Ogiwara, Masayoshi Takayanagi, Masataka Nagaoka, Susumu Kitagawa and Takashi Uemura ()
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Shuto Mochizuki: Kyoto University
Naoki Ogiwara: Kyoto University
Masayoshi Takayanagi: Nagoya University
Masataka Nagaoka: Nagoya University
Susumu Kitagawa: Kyoto University
Takashi Uemura: Kyoto University

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract The design of monomer sequences in polymers has been a challenging research subject, especially in making vinyl copolymers by free-radical polymerization. Here, we report a strategy to obtain sequence-regulated vinyl copolymers, utilizing the periodic structure of a porous coordination polymer (PCP) as a template. Mixing of Cu2+ ion and styrene-3,5-dicarboxylic acid (S) produces a PCP, [Cu(styrene-3,5-dicarboxylate)] n , with the styryl groups periodically immobilized along the one-dimensional channels. After the introduction of acrylonitrile (A) into the host PCP, radical copolymerization between A and the immobilized S is performed inside the channel, followed by decomposing the PCP to isolate the resulting copolymer. The predominant repetitive SAAA sequence in the copolymer is confirmed by monomer composition, NMR spectroscopy and theoretical calculations. Copolymerization using methyl vinyl ketone also provides the same type of sequence-regulated copolymer, showing that this methodology has a versatility to control the copolymer sequence via transcription of PCP periodicity at the molecular level.

Date: 2018
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DOI: 10.1038/s41467-017-02736-1

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