Catenane gel: synthesis of high molecular weight poly[2]catenanes by Sonogashira coupling polymerization

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• 作者：Toshiki Hagiwara ; ^{hagiwara.toshiki@nihon-u.ac.jp} ; Yasuhiro Murano ; Yuki Watanabe ; Toru Hoshi ; Takashi Sawaguchi
• 关键词：[2]Catenane ; Catenane polymer ; Sonogashira coupling ; Polymerization ; Gels
• 刊名：Tetrahedron Letters
• 出版年：2012
• 期刊代码：109_00404039
• 类别：ch
• 出版时间：6 June, 2012
• 卷：53
• 期：23
• 页码：2805-2808
• 文件大小：526 K

摘要

A first catenane polymer gel was obtained by Sonogashira coupling reaction of diiodo[2]catenane and 4,4鈥?diethynylbiphenyl. Because of the linearity and rigidity of the ethynylene group formed in the coupling reaction, the formation of undesired cyclic dimer was inhibited, and a very high molecular weight (M_n > 2.3 脳 10⁵) poly[2]catenane was synthesized. The polymer was gelated without any chemical cross-linkage and swelled in DMF.