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.
W. E. Price, J. Chem. Soc., Faraday Trans. 1, 1989, 85, 415 DOI: 10.1039/F19898500415
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