Insight into framework destruction in ultramarine pigments

Eleonora Del Federico, Wolfgang Shöfberger, Johannes Schelvis, Sofia Kapetanaki, Lindsey Tyne, Alexej Jerschow

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)

Abstract

We report key evidence on the framework destruction in ultramarine pigments upon color fading. Experiments on faded pigments in a fresco painting environment reveal that the paramagnetic chromophores are set free via sodalite framework destruction and are subsequently degraded. Fading in acidic media produces similar results, although a larger number of β-cages appear to be destroyed, and H2S is released. The findings are further supported by studies on natural and synthetic ultramarine pigments of various shades via solid-state resonance-Raman spectroscopy, colorimentry, and solid-state 29Si and 27Al NMR spectroscopy. NMR parameters are shown to correlate well with the intensities of Raman signals corresponding to the S3-. chromophores. A further correlation is established between the colorimetric parameters, L* (lightness) and C* (chroma), and the paramagnetic shift and paramagnetic linebroadening in NMR spectra for both 27Al and 29Si.

Original languageEnglish
Pages (from-to)1270-1276
Number of pages7
JournalInorganic Chemistry
Volume45
Issue number3
DOIs
StatePublished - 6 Feb 2006

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Chromophores
pigments
destruction
Nuclear magnetic resonance
fading
nuclear magnetic resonance
chromophores
Painting
Pigments
Nuclear magnetic resonance spectroscopy
solid state
shades
Raman spectroscopy
sodalite
Color
color
Experiments
shift
spectroscopy
ultramarine (pigment)

Cite this

Del Federico, E., Shöfberger, W., Schelvis, J., Kapetanaki, S., Tyne, L., & Jerschow, A. (2006). Insight into framework destruction in ultramarine pigments. Inorganic Chemistry, 45(3), 1270-1276. https://doi.org/10.1021/ic050903z
Del Federico, Eleonora ; Shöfberger, Wolfgang ; Schelvis, Johannes ; Kapetanaki, Sofia ; Tyne, Lindsey ; Jerschow, Alexej. / Insight into framework destruction in ultramarine pigments. In: Inorganic Chemistry. 2006 ; Vol. 45, No. 3. pp. 1270-1276.
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Del Federico, E, Shöfberger, W, Schelvis, J, Kapetanaki, S, Tyne, L & Jerschow, A 2006, 'Insight into framework destruction in ultramarine pigments', Inorganic Chemistry, vol. 45, no. 3, pp. 1270-1276. https://doi.org/10.1021/ic050903z

Insight into framework destruction in ultramarine pigments. / Del Federico, Eleonora; Shöfberger, Wolfgang; Schelvis, Johannes; Kapetanaki, Sofia; Tyne, Lindsey; Jerschow, Alexej.

In: Inorganic Chemistry, Vol. 45, No. 3, 06.02.2006, p. 1270-1276.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Del Federico, Eleonora

AU - Shöfberger, Wolfgang

AU - Schelvis, Johannes

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AU - Jerschow, Alexej

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Del Federico E, Shöfberger W, Schelvis J, Kapetanaki S, Tyne L, Jerschow A. Insight into framework destruction in ultramarine pigments. Inorganic Chemistry. 2006 Feb 6;45(3):1270-1276. https://doi.org/10.1021/ic050903z