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Covalent modification of calcium hydroxyapatite surface by grafting phenyl phosphonate moieties |
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| Authors: | Abdallah Aissa Michel Gruselle René Thouvenot Rainer Traksmaa |
| Institution: | a Laboratoire de Physico-Chimie des Matériaux, Faculté des Sciences de Monastir, 5019 Monastir, Tunisia b Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR-CNRS 7071, FR-CNRS 2769, case courrier 42, Université Pierre et Marie Curie-Paris 6, 4 place Jussieu, 75252 Paris cedex 05, France c Laboratoire de Chimie de la Matière Condensée, UMR-CNRS 7574, FR-CNRS 2482, case courrier 176,Université Pierre et Marie Curie-Paris 6, 4 place Jussieu, 75252 Paris cedex 05, France d Laboratory of Inorganic Materials, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia |
| Abstract: | The reaction between phenyl phosphonic dichloride (C6H5P(O)Cl2) and synthetic calcium hydroxy- and fluorapatite has been investigated. The presence of mono- or polymeric (C6H5PO) fragment bound to hydroxyapatite was evidenced by IR, and solid-state 31P NMR spectroscopy. X-ray powder analysis has shown that the apatitic structure remains unchanged during the reaction. In contrast, no reaction was found using fluorapatite. According to the results found for these two different apatites a mechanism was proposed for the formation of covalent P-O-P bonds as the result of a reaction between the C6H5P(O)Cl2 organic reagent and (HPO4)− and/or OH− ions of the hydroxyapatite. |
| Keywords: | Hydroxyapatite Phosphonate 31P NMR Hybrid materials |
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