Tracer caffeine diffusion in aqueous solutions at 298 K. The effect of caffeine self-association
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 85 (2) , 415-419
- https://doi.org/10.1039/f19898500415
Abstract
Tracer diffusion coefficients for caffeine in aqueous solutions are reported for the complete caffeine solubility range (0–0.1 mol dm–3) at 298 K. The results show a strong concentration dependence and are interpreted in terms of caffeine self-association. On the basis of a simple equilibrium model, estimates for the diffusion coefficients of the caffeine dimer and trimer are obtained.Keywords
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