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Impact of nanostructural aspects on the stability of dyes and pigments of archaeological interest

Grant number: 12/05643-4
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): July 01, 2012
Effective date (End): February 03, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Dalva Lucia Araujo de Faria
Grantee:Nathália Delboux Bernardino
Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):13/25900-4 - Time resolved resonance Raman Spectroscopy of dyes in confined environments, BE.EP.DR


Nanostructuration of compounds or their microenvironments plays a decisive role in some spontaneous processes such as materials deterioration or stabilization. Such behavior motivated the start up of a new research theme on the synergic effects on the degradation of painting materials (Fapesp 02/13865-5 e 03/07315-5) and cultural heritage (Fapesp 08/56127-0 e 11/13760-8) which includes the present Project. The investigation here proposed aims at the investigation of inorganic pigments (hematite, ghoetite and magnetite) and dyes (indigo, indigo carmine, carmine, alizarin, purpurin, luteolin and bixin). In the case of pigments, the goal is to study how nanostructuration and interaction with the environment affect their properties and interfere with their chemical reactivity. In the case of dyes, the investigation is focused on their interaction with inorganic matrices (montmorillonite, vermiculite, kaolinite, laponite, palygorskita and sepiolite) and how it affects their stability. Such information is important to enlarge our understanding on the factors that improve the chemical stability of dyes in pré-colombian textiles. Therefore, the main Project's target is the understanding of the aspects that affect the chemical reactivity in the considered systems (dyes and pigments of archaeological interest), thus enlarging the knowledge on the technical capabilities of some South American pre-colombian cultures.

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BEMARDINO, N. D.; CONSTANTINO, V. R. L.; DE FARIA, D. L. A.. Probing the Indigo Molecule in Maya Blue Simulants with Resonance Raman Spectroscopy. Journal of Physical Chemistry C, v. 122, n. 21, p. 11505-11515, . (11/50318-1, 12/05643-4, 12/13119-3)
BERNARDINO, NATHALIA D.; CONSTANTINO, VERA R. L.; DE FARIA, DALVA L. A.. Probing the chemical reactivity of interfaces: Investigation on the interaction of dehydroindigo with Laponite by UV-vis, Raman and infrared spectroscopy. VIBRATIONAL SPECTROSCOPY, v. 94, p. 83-88, . (12/13119-3, 11/50318-1, 12/05643-4)
BERNARDINO, N. D.; DE FARIA, D. L. A.; NEGRON, V, A. C.. Applications of Raman spectroscopy in archaeometry: An investigation of pre-Columbian Peruvian textiles. JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS, v. 4, p. 23-31, . (12/05643-4, 12/13119-3)
BERNARDINO, NATHALIA D'ELBOUX; IZUMI, CELLY M. S.; DE FARIA, DALVA L. A.. Fake turquoises investigated by Raman microscopy. Forensic Science International, v. 262, p. 196-200, . (12/05643-4, 12/13119-3)
BERNARDINO, N. D.; BROWN-XU, S.; GUSTAFSON, T. L.; DE FARIA, D. L. A.. Time-Resolved Spectroscopy of Indigo and of a Maya Blue Simulant. Journal of Physical Chemistry C, v. 120, n. 38, p. 21905-21914, . (12/05643-4, 12/13119-3, 13/25900-4)
BERNARDINO, NATHALIA D'ELBOUX; PUGLIERI, THIAGO SEVILHANO; DE FARIA, DALVA L. A.. Effect of MnO2 and alpha-Fe2O3 on organic binders degradation investigated by Raman spectroscopy. VIBRATIONAL SPECTROSCOPY, v. 70, p. 70-77, . (12/05643-4, 11/13760-8, 06/58748-7)

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