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Exotic FeII/FeIII local environments in the hexagonal channels of hydroxyapatite

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBAZIN, Tiphaine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierInstitut de Recherche sur les CERamiques [IRCER]
dc.contributor.authorJULIEN, Isabelle
hal.structure.identifierInstitut de Recherche sur les CERamiques [IRCER]
dc.contributor.authorCHAMPION, Eric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
dc.date.issued2022-09-12
dc.identifier.issn0020-1669
dc.description.abstractEnIn 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).
dc.description.sponsorshipFrom specific ceramic materials and components to integrated, secured and intelligent communication systems - ANR-10-LABX-0074
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enExotic FeII/FeIII local environments in the hexagonal channels of hydroxyapatite
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.inorgchem.2c02212
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page14377-14388
bordeaux.volume61
bordeaux.issue36
bordeaux.peerReviewedoui
hal.identifierhal-03789210
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03789210v1
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