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.
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Ishii, D., Yamada, T., Nakagawa, M. et al. Thermally induced structural transformation in a hydrogen-bonded supramolecular single-crystal. J Therm Anal Calorim 86, 681–685 (2006). https://doi.org/10.1007/s10973-006-7893-7
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DOI: https://doi.org/10.1007/s10973-006-7893-7