Room-Temperature Ring-Opening Polymerization of δ-Valerolactone and ϵ-Caprolactone Caused by Uptake into Porous Pillar[5]arene Crystals

Kenichi Kato, Koki Maeda, Motohiro Mizuno, Yuta Nishina, Shixin Fa, Shunsuke Ohtani, Tomoki Ogoshi

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
JournalAngewandte Chemie - International Edition
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • Crystals
  • Host–Guest Systems
  • Macrocycles
  • Pillar[n]Arenes
  • Polymerization

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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