Synthesis and characterization of nanoapatites organofunctionalized with aminotriphosphonate agents |
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| Authors: | Sanaâ Saoiabi Sanae El Asri Abdelaziz Laghzizil Sylvie Masse Jerome L Ackerman |
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| Institution: | 1. Laboratoire de Chimie Physique Générale, Faculté des Sciences BP 1014, Université Mohamed V-Agdal, Rabat, Morocco;2. UPMC Univ Paris 06, UMR 7574, Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005 Paris, France;3. Biomaterials Laboratory, Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Room 2320, 149 13 Street, Charlestown, MA 02129, USA |
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| Abstract: | Organofunctionalized apatite nanoparticles were prepared using a one step process involving dissolution/precipitation of natural phosphate rock and covalent grafting of nitrilotris(methylene)triphosphonate (NTP). The synthesized materials were characterized by Brunauer–Emmett–Teller (BET) surface measurement, thermogravimetry, inductively coupled plasma emission spectroscopy (ICP–ES), elemental analysis, multinuclear solid state cross-polarization/magic angle spinning (CP/MAS) and single-pulse NMR spectroscopy, transmission electron microscopy (TEM) and energy dispersive X-ray analysis (EDXA). After grafting BET measurements yielded particle specific surface areas ranging from 88 to 193 m2 g?1 depending on the grafted phosphonate. The results show that the surfaces of the nanoapatite particles can be covered with functional groups bound through a variable number of R–P–O–Ca bonds to render them organoapatites. |
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