Magnetic and New Optical Properties in the UV–visible Range of the Egyptian Blue Pigment Cuprorivaite CaCuSi 4 O 10 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry C Année : 2021

Magnetic and New Optical Properties in the UV–visible Range of the Egyptian Blue Pigment Cuprorivaite CaCuSi 4 O 10

Résumé

Cuprorivaite CaCuSi4O10, the so-called Egyptian blue pigment, exhibits a characteristic and well-known near-infrared luminescence upon excitation in Cu2+d–d transitions. Here, we show that upon excitation in the UV, this near-infrared emission is considerably amplified and is accompanied by three different UV–visible emission bands. These four UV-excited emissions are attributed to self-trapped excitons (emission at 2.8 eV), to excitons trapped at Cu sites (emission at 1.4 eV), and to trapped exciton emission where the hole is only trapped at Cu sites (emissions at 2.65 and 3.27 eV). Despite the high Cu content of cuprorivaite, electron magnetic resonance reveals only a weak antiferromagnetic interaction (about 0.08 meV), which averages out the hyperfine interaction of the electron spin with nuclear spins of 63Cu and 65Cu nuclei.
Fichier principal
Vignette du fichier
Manuscript.pdf (1.11 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03476635 , version 1 (13-12-2021)

Identifiants

Citer

Laurent Binet, Juliette Lizion, Sylvain Bertaina, Didier Gourier. Magnetic and New Optical Properties in the UV–visible Range of the Egyptian Blue Pigment Cuprorivaite CaCuSi 4 O 10. Journal of Physical Chemistry C, 2021, 125 (45), pp.25189-25196. ⟨10.1021/acs.jpcc.1c06060⟩. ⟨hal-03476635⟩
71 Consultations
60 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More