Preparation of glycine polymorphs crystallized in water and physicochemical characterizations
This study shows that it is possible to obtain pure α-glycine or a mixture of glycine polymorphs (α and γ) in aqueous solution, depending on the mode of preparation, either continuous or semi-continuous. The differences between the two samples of glycine in solid state and in aqueous solution have b...
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Veröffentlicht in: | Journal of crystal growth 2010-05, Vol.312 (11), p.1860-1865 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | This study shows that it is possible to obtain pure α-glycine or a mixture of glycine polymorphs (α and γ) in aqueous solution, depending on the mode of preparation, either continuous or semi-continuous. The differences between the two samples of glycine in solid state and in aqueous solution have been studied, using the following techniques: X-ray analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), thermal microscopy, calorimetric analysis, thermally stimulated current (TSC) analysis and electrochemical impedance analysis. These analyses show that the presence of γ-glycine significantly modifies the physico-chemical properties of these two samples. |
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ISSN: | 0022-0248 1873-5002 |
DOI: | 10.1016/j.jcrysgro.2010.03.011 |