[Sans titre]
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DEMOURGUES, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | PENIN, Nicolas | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DURAND, Etienne | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WEILL, François | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DAMBOURNET, Damien | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | VIADÈRE, Nicolas | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TRESSAUD, Alain | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | The microwave-assisted route allows the synthesis of a new Ti hydroxyfluoride adopting a derived form of a ReO<sub>3</sub>-type network. Combined techniques such as (i) powder X-ray and neutron diffraction coupled with electron microscopy; (ii) chemical analysis and density measurements; and (iii) FTIR and TGA analyses support the occurrence of Ti vacancies and the stabilization of hydroxyl groups in the vicinity of Ti<sup>4+</sup> cations. A superstructure of the ReO<sub>3</sub> network has been proposed with two Ti sites and two anionic (OH/F) positions. This original compound exhibits UV-shielding properties with an optical band gap around 3.2 eV and could be considered for potential applications as protective UV absorbers.The O(2p)−Ti(3d) charge transfer band, responsible for this absorption, implies the OH groups and the nonbonding character of the 2p valence band. By changing the synthesis conditions which become reducing, Ti<sup>3+</sup> can be stabilized in this network in an elongated octahedral site as revealed by ESR experiments and UV−visible spectroscopy. This is a second example following the recently prepared Al-based fluoride hydrate with Al vacancies, in which a polarizing cation such as Ti<sup>4+</sup> can accommodate cationic vacancies. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | Titanium | |
| dc.subject.en | UV | |
| dc.subject.en | Hydroxyfluoride | |
| dc.subject.en | Inorganic compounds | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/cm8030297 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 1275-1283 | |
| bordeaux.volume | 21 | |
| bordeaux.issue | 7 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00374091 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00374091v1 | |
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