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- Title
Room‐Temperature Ring‐Opening Polymerization of δ‐Valerolactone and ϵ‐Caprolactone Caused by Uptake into Porous Pillar[5]arene Crystals.
- Authors
Kato, Kenichi; Maeda, Koki; Mizuno, Motohiro; Nishina, Yuta; Fa, Shixin; Ohtani, Shunsuke; Ogoshi, Tomoki
- Abstract
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.
- Subjects
RING-opening polymerization; COLUMNS; LIQUID crystals; CRYSTALS; HYDROGEN bonding; CATALYTIC activity
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 50, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202212874