Room‐Temperature Ring‐Opening Polymerization of δ‐Valerolactone and ?‐Caprolactone Caused by Uptake into Porous Pillar[5]arene Crystals
Room‐Temperature Ring‐Opening Polymerization of δ‐Valerolactone and ?‐Caprolactone Caused by Uptake into Porous Pillar[5]arene Crystals
复制标题
多孔柱[5]芳烃晶体吸收引起δ-戊内酯和ε-己内酯的室温开环聚合
DOI：
10.1002/anie.202212874
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Ogoshi Tomoki
中科院分区：
文献类型：
--
作者：
Kato Kenichi;Maeda Koki;Mizuno Motohiro;Nishina Yuta;Fa Shixin;Ohtani Shunsuke;Ogoshi Tomoki
与均匀溶液相比，受限空间提供了具有改变的反应速率和选择性的反应平台。在这项工作中，多孔酚柱[5]芳烃晶体被用作反应空间，以促进和扰乱内酯和它们相应的聚酯之间的平衡。将多孔柱[5]芳烃晶体浸入液体内酯中，室温下引发δ-戊内酯和ε-己内酯的开环聚合，这是因为柱[5]芳烃的酚羟基通过氢键具有催化活性，而柱[5]芳烃的空穴更偏爱线性客体。反应后，柱[5]芳烃和聚酯形成假聚轮烷。
Confined space provides a reaction platform with altered reaction rate and selectivity compared with a homogeneous solution. In this work, porous phenolic pillar[5]arene crystals were used as a reaction space to promote and perturb equilibrium between lactones and their corresponding polyesters. Immersion of porous pillar[5]arene crystals in liquid lactones induced ring‐opening polymerization of δ‐valerolactone and ϵ‐caprolactone at room temperature because the phenolic hydroxy groups have catalytic activity via hydrogen bonds and the pillar[5]arene cavities prefer linear guests. After the reaction, pillar[5]arene and polyesters formed pseudo‐polyrotaxanes.