Solid-state NMR and resonance Raman studies of ultramarine pigments

Eleonora Del Federico, Wolfgang Schoefberger, Rajeev Kumar, Wen Ling, Sofia M. Kapetanaki, Johanes Schelvis, Alexej Jerschow

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


We report on a study of ultramarine pigments via Colorimetry, resonance Raman, and 27Al, 29Si solid-state NMR spectroscopy. NMR parameters are shown to correlate well with the intensities of Raman signals corresponding to the chromophores S 3 -. and S 2 -.. Further, a correlation is established between the colorimetric parameters L* (lightness) and C* (chromaticity) and the paramagnetic shift in NMR spectra for both 27Al and 29Si. The parameter h (hue) appeared not to vary over the range of paramagnetic host concentrations studied. Preliminary results on faded pigments in both acidic and basic media show that the concentration of diamagnetic guest molecules in the sodalite lattice rises, and some of the paramagnetic species are replaced.

Original languageEnglish
Article numberOO5.4
Pages (from-to)247-254
Number of pages8
JournalMaterials Research Society Symposium Proceedings
StatePublished - 2005
Event2004 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: 30 Nov 20043 Dec 2004


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