〔閲覧〕【著作】([平野 朋広]/Ishizu Hideaki/[佐藤 恒之]/Metal-free isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide derivatives: The effect of methyl substituents of pyridine N-oxide on the isotactic specificity and the proposed mechanism for the isotactic-specific radical polymerization/[Polymer])
(英) Metal-free isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide derivatives: The effect of methyl substituents of pyridine N-oxide on the isotactic specificity and the proposed mechanism for the isotactic-specific radical polymerization (日)
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(英) The radical polymerizations of N-isopropylacrylamide (NIPAAm) in chloroform at low temperatures in the presence of pyridine N-oxide (PNO) derivatives were investigated. It was found that the methylation at meta-positions of PNO improved the isotactic specificity induced by PNO, whereas the methylation at ortho-positions prevented the induction of the isotactic specificity. NMR analysis revealed that NIPAAm and PNO derivatives formed predominantly 2:1 complex through a hydrogen-bonding interaction. Furthermore, the induction of the isotactic specificity was attributed to the conformationally limited propagating radicals. Based on these findings, the mechanism of the isotactic-specific radical polymerization was discussed. (日) クロロホルム中でのN-イソプロピルアクリルアミドのラジカル重合におけるピリジンN-オキシド誘導体の添加効果をしらべ,メタ位にメチル基を導入するとイソタクチック特異性が向上することを見出し,反応機構を考察した.
Tomohiro Hirano, Hideaki IshizuandTsuneyuki Sato : Metal-free isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide derivatives: The effect of methyl substituents of pyridine N-oxide on the isotactic specificity and the proposed mechanism for the isotactic-specific radical polymerization, Polymer, Vol.49, No.2, 438-445, 2008.
欧文冊子 ●
Tomohiro Hirano, Hideaki IshizuandTsuneyuki Sato : Metal-free isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide derivatives: The effect of methyl substituents of pyridine N-oxide on the isotactic specificity and the proposed mechanism for the isotactic-specific radical polymerization, Polymer, Vol.49, No.2, 438-445, 2008.
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