학술논문
Thermally induced structural transformation in a hydrogen-bonded supramolecular single-crystal; DSC-FTIR studies
Document Type
Author abstract
Author
Source
Journal of Thermal Analysis and Calorimetry. Dec, 2006, Vol. 86 Issue 3, p681.
Subject
Language
English
ISSN
1388-6150
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-K.sub.[alpha] radiation). As a result, the crystal of MeO was stabilized by many C--HaaaO hydrogen bonds, and the C--HaaaO hydrogen bonds were broken by thermal energy reversibly. After transformation the supramolecular architecture was composed of supramolecular polymer including free-rotation pentamethylene main chains.