Vibrational spectroscopic characterization of new calcium phosphate bioactive coatings
| Autor: | Alessandro Bertoluzza, G. Bottura, Paola Taddei, Anna Tinti |
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| Rok vydání: | 2000 |
| Předmět: |
Calcium Phosphates
Molar Biophysics Nucleation chemistry.chemical_element Mineralogy Calcium Spectrum Analysis Raman Vibration Biochemistry Ion Biomaterials Structure-Activity Relationship chemistry.chemical_compound symbols.namesake Coated Materials Biocompatible Spectroscopy Fourier Transform Infrared Hydroxyapatites Octacalcium phosphate Organic Chemistry General Medicine Amorphous solid chemistry symbols Raman spectroscopy Nuclear chemistry |
| Zdroj: | Biopolymers. 57:140-148 |
| ISSN: | 1097-0282 0006-3525 |
| DOI: | 10.1002/(sici)1097-0282(2000)57:3<140::aid-bip2>3.0.co;2-9 |
| Popis: | In this work calcium phosphate (CaP) compounds with different PO(3-)(4)/HPO(2-)(4) R molar ratios in the 0.65-149 range were synthesized. In fact, all these CaPs contain different amounts of HPO(2-)(4) and PO(3-)(4) ions as well as the amorphous precursors (tricalcium phosphate and octacalcium phosphate) of hydroxyapatite deposition, which was shown by in vitro and in vivo measurements. Spectroscopical IR and Raman results showed the presence of bands whose intensity ratio can be related to the molar ratio R; in particular, the Raman I(962)/I(987) and the IR I(1035)/I(1125) intensity ratios were characterized as markers of the molar ratio. For these CaP compounds a nucleation model, which was based on the ability of HPO(2-)(4) ions to form strong H bonds with PO(3-)(4) ions, was proposed. |
| Databáze: | OpenAIRE |
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