Titre :

Insight into the structure of black coatings of ancient Egyptian mummies by advanced electron magnetic resonance of vanadyl complexes

Auteur(s) :

Dutoit, Charles E. [Auteur]
Institut de Recherche de Chimie Paris [IRCP]
Binet, Laurent [Auteur]
Institut de Recherche de Chimie Paris [IRCP]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Anduze, Océane [Auteur]
Institut de Recherche de Chimie Paris [IRCP]
Lattuati-Derieux, Agnès [Auteur]
Centre de recherche et de restauration des musées de France [C2RMF]
Gourier, Didier [Auteur]
Institut de Recherche de Chimie Paris [IRCP]

Titre de la revue :

Magnetic Resonance

Nom court de la revue :

Magn. Reson.

Numéro :

3

Pagination :

111-124

Éditeur :

Copernicus GmbH

Date de publication :

2022-07-13

ISSN :

2699-0016

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Ancient Egyptian mummies from the Late Period to the Greco–Roman Period were covered by a black coating consisting of complex and heterogeneous mixtures of conifer resins, wax, fat and oil with variable amounts of bitumen. ...
Lire la suite >Ancient Egyptian mummies from the Late Period to the Greco–Roman Period were covered by a black coating consisting of complex and heterogeneous mixtures of conifer resins, wax, fat and oil with variable amounts of bitumen. Natural bitumen always contains traces of vanadyl porphyrin complexes that we used here as internal probes to explore the nanoscale environment of V4+ ions in these black coatings by electron nuclear double resonance (ENDOR) and hyperfine sub-level correlation spectroscopy (HYSCORE). Four types of vanadyl porphyrin complexes were identified from the analysis of 14N hyperfine interactions. Three types (referred to as VO-P1, VO-P2 and VO-P3) are present in natural bitumen from the Dead Sea, among which VO-P1 and VO-P2 are also present in black coatings of mummies. The absence of VO-P3 in mummies, which is replaced by another complex, VO-P4, may be due to its transformation during preparation of the black matter for embalming. Analysis of 1H hyperfine interaction shows that bitumen and other natural substances are intimately mixed in these black coatings, with aggregate sizes of bitumen increasing with the bitumen content but not exceeding a few nanometres.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

Le spin électronique: un nouvel outil pour l'héritage culturel et la protection de la population

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)

Date de dépôt :

2022-07-22T09:54:30Z
2022-08-24T08:39:43Z