Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 20, Issue 40, Pages 12759-12762Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201403358
Keywords
counting; helical structures; sulfonamides; thermal hysteresis; threshold
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Funding
- JSPS [22790004, 257424]
- Grants-in-Aid for Scientific Research [13J07424, 22790004, 21229001] Funding Source: KAKEN
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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.
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