Ivanovo, Ivanovo, Russian Federation
student
Ivanovo, Ivanovo, Russian Federation
The article considers the synthesis of meso-tetrakis(1'-methyl-pyrid-4-yl)porphyrin tetratosylate and meso-tetrakis(1'-methyl-carboxymethylpyrid-4-yl)porphyrin tetrabromide. The authors qualified the porphyrin ligands in terms of the electron and 1H NMR spectroscopy. The research determines the decrease of freezing point (ΔTfr) of aqueous solutions of porphyrins, as well as a model N-methyl-pyridinium salt (1 methyl-pyridinium iodide). We used the obtained experimental values of ΔT3 to determine the isotonic coefficient. The obtained results indicate the compounds are almost completely dissociated in the indicated concentration range in dilute solutions.
Water-soluble tetrapyridylporphyrins, water, isotonic coefficient, cryoscopy
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