X-ray diffraction study of the molecular association in aqueous solutions of d-fructose, d-glucose,and sucrose |
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Authors: | Mohamed Mathlouthi |
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Institution: | Institut Universitaire de Technologie, Département “Biologie Appliquée”, Université de Dijon, B.P. 510, 21014 Dijon-cédex France |
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Abstract: | X-ray diffractograms of aqueous solutions of d-fructose, d-glucose, and sucrose, and of two amorphous “solid” forms of these carbohydrates are recorded in the angular range of O 2-16°. The formation, in these diffractograms, of one or two intensity maxima as the concentration is varied is interpreted in terms of modification of the molecular association. A model is proposed that takes account of the state of organization of the solutions of the three sugars as a function of the concentration. Sucrose shows an “anomaly”, as it is the only sugar to establish intramolecular bonds. The number of these intramolecular bonds also depends on the concentration. |
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