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Electrofluorescence of dye-tagged sepiolite

Published online by Cambridge University Press:  09 July 2018

G. W. Middleton  and
B. R. Jennings
G. W. Middleton
Affiliation:
Electro-Optics Group, J. J. Thomson Physical Laboratory, Reading University, Reading, Berkshire RG6 2AF, and Research Department, English China Clays International, St Austell, Cornwall PL25 4DJ, UK
B. R. Jennings
Affiliation:
Electro-Optics Group, J. J. Thomson Physical Laboratory, Reading University, Reading, Berkshire RG6 2AF, and Research Department, English China Clays International, St Austell, Cornwall PL25 4DJ, UK
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Abstract

In electric fields, anisodiametric mineral particles in suspension orientate and align. When tagged with fluorescent molecules, the alignment is accompanied by changes in the intensities of the polarized components of the emitted fluorescence. By measuring these changes under specific experimental conditions, any non-random directional coincidence of the absorption and emission transition moments associated with the dye molecules can be evaluated and the spatial array of the dyes estimated. From such measurements, the binding of the optical brightening agent FBA1, a triazinylaminostilbene compound, to sepiolite has been studied.

Type
Research Article
Information
Clay Minerals , Volume 26 , Issue 1 , March 1991 , pp. 1 - 9
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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