The aim of this work was the synthesis of hybrid materials of iron (II)-based therapeutic systems via the sol-gel method. Increasing amounts of polyethylene glycol (PEG 6, 12, 24, 50 wt%) were added to SiO2/Fe20 wt% to modulate the release kinetics of the drug from the systems. Fourier-transform infrared (FTIR) spectroscopy was used to study the interactions between different components in the hybrid materials. The release kinetics in a simulated body fluid (SBF) were investigated, and the amount of Fe2+ released was detected via ultraviolet-visible spectroscopy (UV-Vis) after reaction with ortho-phenanthroline. Furthermore, biological characterization was carried out. The bioactivity of the synthesized hybrid materials was evaluated via the formation of a layer of hydroxyapatite on the surface of samples soaked in SBF using spectroscopy. Finally, the potential antibacterial properties of seven different materials against two different bacteria—E. coli and S. aureus—were investigated.
The aim of this work is to characterize and compare three different structures of Ferrous citrates (Fe(II)C), amorphous, semicrystalline, and crystalline incorporated into a SiO 2 inorganic matrix by sol-gel technique. Fourier transform infrared spectroscopy (FTIR) confirms both the Fe(II)C presence in the silica matrix and the interactions among different components in the hybrid materials. Moreover, FTIR spectroscopy is used to evaluate the formation of hydroxyapatite layer, known as bioactivity test, of the hybrids soaked into simulated body fluid (SBF). Finally, the antibacterial properties of the hybrids are investigated.
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