Identification of the EPR signal of S2− ...
Document type :
Article dans une revue scientifique: Article original
DOI :
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Title :
Identification of the EPR signal of S2− in green ultramarine pigments
Author(s) :
Raulin, Katarzyna [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
GOBELTZ, Noëlle [Auteur]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Touati, Nadia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ledé, Bertrand [Auteur]
Moissette, Alain [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
GOBELTZ, Noëlle [Auteur]
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Touati, Nadia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ledé, Bertrand [Auteur]
Moissette, Alain [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Journal title :
Physical Chemistry Chemical Physics
Abbreviated title :
Phys. Chem. Chem. Phys.
Volume number :
13
Pages :
9253
Publisher :
Royal Society of Chemistry (RSC)
Publication date :
2011
ISSN :
1463-9076
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
Green and blue ultramarine pigments are characterized by the sodalite structure Na6(Al6Si6O24) and colored inserted species. These chromophores are sulfur species: S3− (blue) and S2− (yellow). Both radicals are encapsulated ...
Show more >Green and blue ultramarine pigments are characterized by the sodalite structure Na6(Al6Si6O24) and colored inserted species. These chromophores are sulfur species: S3− (blue) and S2− (yellow). Both radicals are encapsulated inside the β-cages. They contribute to the EPR spectrum of ultramarine pigments. The well-known strong EPR signal observed in all ultramarine pigments Continuous-Wave (CW) spectra has long been assigned to S3− (g = 2.029). In contrast, the S2− contribution is still subject to controversy because its signal in ultramarine pigments was not resolved even at low temperature in CW-EPR experiments. In this study, we identify unambiguously for the first time by CW-EPR and field sweep-echo detected (FS-ED) EPR the signal of S2− in ultramarine pigments and we determine its tensor components: g1 = 2.69(6), g2 = 2.03(4) and g3 = 1.86(4).Show less >
Show more >Green and blue ultramarine pigments are characterized by the sodalite structure Na6(Al6Si6O24) and colored inserted species. These chromophores are sulfur species: S3− (blue) and S2− (yellow). Both radicals are encapsulated inside the β-cages. They contribute to the EPR spectrum of ultramarine pigments. The well-known strong EPR signal observed in all ultramarine pigments Continuous-Wave (CW) spectra has long been assigned to S3− (g = 2.029). In contrast, the S2− contribution is still subject to controversy because its signal in ultramarine pigments was not resolved even at low temperature in CW-EPR experiments. In this study, we identify unambiguously for the first time by CW-EPR and field sweep-echo detected (FS-ED) EPR the signal of S2− in ultramarine pigments and we determine its tensor components: g1 = 2.69(6), g2 = 2.03(4) and g3 = 1.86(4).Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Submission date :
2021-06-18T08:12:32Z
2021-10-14T08:37:06Z
2021-10-14T08:37:06Z