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 language | English |
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Pages (from-to) | 12759-12762 |
Number of pages | 4 |
Journal | Chemistry - A European Journal |
Volume | 20 |
Issue number | 40 |
DOIs | |
Publication status | Published - 2014 Sep 26 |
Keywords
- counting
- helical structures
- sulfonamides
- thermal hysteresis
- threshold
ASJC Scopus subject areas
- Catalysis
- Organic Chemistry