Composites of hydroxyapatite (HA) with glycine (Gly), designed for bone repair, were prepared and thoroughly characterized using various physicochemical methods (PXRD, TEM, EDXMA, FT-IR and UV-spectrophotometry). It was proved that the de novo synthesis of HA in the presence of Gly is capable of introducing the amino acid into the crystal lattice. This was particularly manifested by a decrease in crystallinity of HA and concentration of its structural hydroxyl groups, and by a significant impact on the dimensions of the crystal unit cell of HA. An IR band at about 1440 cm−1 of ionized carboxyl groups was uniquely assigned to Gly residing in the crystal interior of HA. Another ascertained location of Gly was the crystal surface, easily attainable by a simple adsorption. The quantitative analysis of Gly in the samples washed with water demonstrated that the adsorbed amino acid was relatively well bound to HA crystals.
Journal of Solid State Chemistry – Elsevier
Published: Aug 1, 2018
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