Reversible nonequilibrium-to-equilibrium chemical reaction and molecular switching function of sulfonamidohelicene oligomer

Masanori Shigeno, Yo Kushida, Masahiko Yamaguchi

Research output: Contribution to journalReview articlepeer-review

1 Citation (Scopus)

Abstract

Nonequilibrium-to-equilibrium chemical reactions, involving change of a metastable to an equilibrium state, are discussed from the aspects of reaction paths and thermodynamics. Such reaction exhibits multiple-paths nature in microscopic molecular structural changes and in macroscopic molecular concentration changes. Involvement of reversibility largely enhances the multiple-paths nature. We describe here our recent studies on the reversible nonequilibrium molecular switching system of sulfonamidohelicene oligomer in diluted solution, which involves the reversible nonequilibrium-to-equilibrium chemical reactions. Molecular structural changes from metastable random-coil to helix-dimer under equilibrium with self-catalysis show notable chemical phenomena of molecular thermal hysteresis, molecular memory effect, threshold phenomena, counting the numbers 1 and 2, and concentration amplification.

Original languageEnglish
Pages (from-to)228-239
Number of pages12
JournalYuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry
Volume75
Issue number3
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Equilibrium
  • Helicene
  • Metastable
  • Molecular switching
  • Molecular thermal hysteresis
  • Nonequilibrium
  • Self-catalysis
  • Threshold

ASJC Scopus subject areas

  • Organic Chemistry

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