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Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

Published online by Cambridge University Press:  17 June 2011

Catherine Dejoie*
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France Lawrence Berkeley National Laboratory, Advanced Light Source, 1 Cyclotron Road, Berkeley CA 94720, USA
Pauline Martinetto
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France
Eric Dooryhée
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France National Synchrotron Light Source-II, Brookhaven, Upton, NY 11973, USA
Ross Brown
Affiliation:
Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, CNRS, Hélioparc, 2 avenue Pierre Angot, F-64053 Pau Cedex 9, France
Sylvie Blanc
Affiliation:
Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, CNRS, Hélioparc, 2 avenue Pierre Angot, F-64053 Pau Cedex 9, France
Patrice Bordat
Affiliation:
Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, CNRS, Hélioparc, 2 avenue Pierre Angot, F-64053 Pau Cedex 9, France
Pierre Strobel
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France
Philippe Odier
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France
Florence Porcher
Affiliation:
Laboratoire de Cristallographie, Résonnance Magnétique et Modélisation, UHP-CNRS, Faculté des Sciences BP 70239, F- 54506 Vandoeuvre-les-Nancy, France Laboratoire Léon Brillouin, CEA-CNRS, F-91191 Gif-sur-Yvette, France
Manuel Sanchez del Rio
Affiliation:
European Synchrotron Radiation Facility - 6 rue Jules Horowitz, F-38000 Grenoble, France
Elsa Van Eslande
Affiliation:
Centre de Recherche et de Restauration des Musées de France, CNRS, Palais du Louvre, Porte des Lions, 14 Quai François Mitterrand F-75001 Paris, France
Philippe Walter
Affiliation:
Centre de Recherche et de Restauration des Musées de France, CNRS, Palais du Louvre, Porte des Lions, 14 Quai François Mitterrand F-75001 Paris, France
Michel Anne
Affiliation:
Institut Néel, (UPR 2940 CNRS), 25 avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, France
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Abstract

The search for durable dyes led several past civilizations to develop artificial pigments. Maya Blue (MB), manufactured in pre-Columbian Mesoamerica, is one of the best known examples of an organic-inorganic hybrid material. Its durability is due to the unique association of indigo molecule and palygorskite, a particular fibrous clay occurring in Yucatan. Despite 50 years of sustained interest, the microscopic structure of MB and its relation to the durability remain open questions. Combining new thermogravimetric and synchrotron X-ray diffraction analyses, we show that indigo molecules can diffuse into the channel of the palygorskite during the heating process, replacing zeolitic water and stabilizing the room temperature phases of the clay.

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Type
Research Article
Copyright
Copyright © Materials Research Society 2011

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