Molecular function of counting the numbers 1 and 2 exhibited by a sulfoneamidohelicene tetramer

Masanori Shigeno, Yo Kushida, Yuta Kobayashi, Masahiko Yamaguchi

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The sulfoneamidohelicene tetramer in solution exhibits different molecular responses to the same cooling stimulus delivered once and twice under thermal hysteresis conditions. Its random-coil state at a high temperature was cooled and maintained at a given temperature for which its molecules remained in a random coil (first cooling); the resulting solution was heated and cooled, after which a helix dimer formed (second cooling). Such a property can be regarded as a molecular function of counting the numbers 1 and 2. Chemistry that counts! The sulfoneamidohelicene tetramer in solution responds not to the first cooling stimulus but to the second under thermal hysteresis conditions; this changes the structure from a random coil to a helix dimer (see figure; Boc=tert-butoxycarbonyl). This is a molecular function of counting the numbers 1 and 2.

Original languageEnglish
Pages (from-to)12759-12762
Number of pages4
JournalChemistry - A European Journal
Volume20
Issue number40
DOIs
Publication statusPublished - 2014 Sep 26

Keywords

  • counting
  • helical structures
  • sulfonamides
  • thermal hysteresis
  • threshold

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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