From Maya Blue to ¿Maya Yellow¿: A Connection between Ancient Nanostructured Materials from the Voltammetry of Microparticles

Autores UPV
Año
Revista ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Abstract

The yellow hue of a series of samples from wall paintings in several Mayan archaeological sites can be attributed to the presence of indigoid compounds, including isatin and dehydroindigo, attached to palygorskite, a local phyllosilicate clay. SEM/EDX, TEM, UV/Vis spectroscopy, and voltammetry of microparticles show that the ancient Mayas could prepare indigo, Maya Blue, and "Maya Yellow" during successive stages. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.