Abstract
Some aminonaphthalenesulfonate derivatives were examined as moisture probes in hydroxypropyl cellulose film. The fluorescence maximum in wavenumber and maximum intensity correlate linearly with water content in the film. The dependence of these values on relative humidity and water content is interpreted in terms of polarity increase of the microenvironment in the film. The difference in photophysical behavior between the fluorophores and characteristics of the polymer as a vehicle are discussed.
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