Organically modified porous hydroxyapatites: A comparison between alkylphosphonate grafting and citrate chelation
| Autor: | A. Laghzizil, A. Saoiabi, Cécile Roux, Thibaud Coradin, Jacques Livage, L. El-Hammari, H. Marroun |
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| Přispěvatelé: | Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) (LCMCP (site Paris VI)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
Inorganic chemistry
02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Inorganic Chemistry Crystallinity Specific surface area Materials Chemistry Hydroxyapatites Chelation Physical and Theoretical Chemistry ComputingMilieux_MISCELLANEOUS Alkyl chemistry.chemical_classification Chemistry Nuclear magnetic resonance spectroscopy 021001 nanoscience & nanotechnology Condensed Matter Physics Grafting 0104 chemical sciences Electronic Optical and Magnetic Materials Chemical engineering Ceramics and Composites 0210 nano-technology Mesoporous material |
| Zdroj: | Journal of Solid State Chemistry Journal of Solid State Chemistry, 2008, 181, pp.848-854 Journal of Solid State Chemistry, Elsevier, 2008, 181, pp.848-854 |
| ISSN: | 0022-4596 1095-726X |
| DOI: | 10.1016/j.jssc.2008.01.030 |
| Popis: | Two alternative methods to prepare organically modified porous hydroxyapatites following a 'one pot' approach were compared. The partial substitution of inorganic phosphates by alkylphosphonates leads to mesoporous materials with high specific surface area (>200 m{sup 2} g{sup -1}). The incorporation of the organic moieties within the hydroxyapatite structure is confirmed by Infra-red and solid-state NMR spectroscopy and depends on the nature of the alkyl chain. However, it induces a significant loss of the material crystallinity. In contrast, the introduction of citrate, a calcium-chelating agent, to the precursor solution does not improve the material specific surface area but allows a better control of the hydroxyapatite structure, both in terms of crystallinity and pore size distribution. - Graphical abstract: Evolution of pore size distribution of hydroxyapatite (HAp) after alkylphosphonate grafting (20% TPOH) or citrate addition (c-HAp) demonstrates the formation of organically modified mesoporous materials. |
| Databáze: | OpenAIRE |
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