Thermally induced structural transformation in a hydrogen-bonded supramolecular single-crystal: DSC-FTIR studies

D. Ishii, T. Yamada, M. Nakagawa, T. Iyoda, H. Yoshida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The thermally induced structural transformation of a hydrogen-bonded crystal formed from an amphoteric molecule of 6-[2-methoxy-4-(pyridylazo) phenoxy]hexanoic acid MeO was studied using differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction measurement (XRD). Crystal form of the hydrogen-bonded crystal was measured by single crystal four circle diffractometer (Mo-Kα radiation). As a result, the crystal of MeO was stabilized by many C-H⋯O hydrogen bonds, and the C-H⋯O hydrogen bonds were broken by thermal energy reversibly. After transformation the supramolecular architecture was composed of supramolecular polymer including free-rotation pentamethylene main chains.

Original languageEnglish
Pages (from-to)681-685
Number of pages5
JournalJournal of Thermal Analysis and Calorimetry
Volume86
Issue number3
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes

Keywords

  • Amphoteric compound
  • C-H⋯O
  • Crystal structure
  • DSC-FTIR
  • Hydrogen bond
  • Rotator phase
  • Structural transition
  • Supramolecular polymer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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