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Surface Modification of a Hydrogen-Bonded Pigment: A Fluorescence Spectroscopy Study
1Institut de chimie physique 2, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
Abstract:
The effect of hydrogen-bonding additives on the surface modification of a hydrogen-bonded organic pigment is studied using absorption and fluorescence spectroscopy. Evidence for surface dissolution that occurs during the mixing of solids is presented. The spectral signatures of monomers and hydrogen-bonded aggregates of the pigment that are present on the surface of crystallites of the pigment are quite distinct, as revealed by fluorescence excitation and emission spectra. Copyright 1999 Academic Press.
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