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 language | English |
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Pages (from-to) | 681-685 |
Number of pages | 5 |
Journal | Journal of Thermal Analysis and Calorimetry |
Volume | 86 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2006 Dec |
Externally published | Yes |
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