Thermodynamics of solution of proto- and mezoporphyrins in N,N-dimethylformamide |
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| Institution: | 1. United Physico-Chemical Centre, G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russian Federation;2. United Physico-Chemical Centre, Ivanovo State University of Chemistry and Technology, Sheremetevskiy av. 10, 153012 Ivanovo, Russian Federation;3. Research Institute of Macroheretocyclic Compounds, Ivanovo State University of Chemistry and Technology, Sheremetevskiy av. 7, 153012 Ivanovo, Russian Federation;1. Institute of Physical and Theoretical Chemistry, Graz University of Technology, NAWI Graz, Stremayrgasse 9/I, 8010 Graz, Austria;2. Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria;1. Laboratory of Environmental Analytical Chemistry, University of the Balearic Islands, Carretera de Valldemosa km 7.5, 07122, Palma de Mallorca, Spain;2. Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, P.O. Box 96, 13400-970, Piracicaba, SP, Brazil |
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| Abstract: | This paper describes the results of thermodynamic study of dissolution of proto- and mesoporphyrins in liquid N,N-dimethylformamide (DMF) at different temperatures. Enthalpies of solution and solubility of protoporphyrin dimethylester (PDE) and mesoporphyrin dimethylester (MDE) in DMF have been obtained from T = (298 to 318) K. Free energies, enthalpies, entropies and heat capacities of solution have been computed from the combination of enthalpic and solubility data via the Gibbs–Helmholtz equation. We have shown that for all blood porphyrins this approach reproduces both free energies of solution and solubility values for the physiological temperature range. |
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| Keywords: | Porphyrins N N-dimethylformamide Thermodynamics of solution Solubility Prediction |
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