BAZIN, Tiphaine; DUTTINE, Mathieu; JULIEN, Isabelle; CHAMPION, Eric; DEMOURGUES, Alain; GAUDON, Manuel

doi:10.1021/acs.inorgchem.2c02212

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BAZIN, Tiphaine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DUTTINE, Mathieu
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

JULIEN, Isabelle
Institut de Recherche sur les CERamiques [IRCER]

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Ce document a été publié dans

Inorganic Chemistry. 2022-09-12, vol. 61, n° 36, p. 14377-14388

American Chemical Society

Résumé en anglais

In this fundamental solid-state chemistry study, two sample series were investigated in depth: iron(III)-doped hydroxyapatite (HA) compounds obtained from a co-sintering process of hematite and pure HA under air and iron(III)-doped HA compounds obtained from a co-sintering process from iron(II) acetate and pure HA under an argon atmosphere. X-ray diffraction, UV–visible, Fourier transform infrared, 1H and 31P NMR, electron paramagnetic resonance (EPR,) and Mössbauer spectroscopy methods were coupled to unravel the Fe valence states, the interactions with other anionic species (OH– and PO43–), and finally the complex local environments in hexagonal channels in both the series. In particular, we highlighted the associated mechanism to ensure electroneutrality with a focus on deprotonation versus calcium substitution. By diverging mechanisms, Fe3+ and Fe2+ ions were found to be located in different coordinated sites: 4(+1) coordinated site for Fe3+ and 2(+3) coordinated site for Fe2+ and clearly associated with very different Mössbauer and EPR signatures as various absorption bands (leading to different sample colors).< Réduire

DOI

http://dx.doi.org/10.1021/acs.inorgchem.2c02212

Project ANR

From specific ceramic materials and components to integrated, secured and intelligent communication systems - ANR-10-LABX-0074

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026