Abstract
The concentration and temperature dependence of the chemical shifts of aromatic and β-protons of tetra-meso substituted porphyrin ions in aqueous solution have been investigated. A considerable increase in the localization temperatures of interior NH protons of porphyrins dissolved in water compared to solutions of porphyrins in organic solvents was observed. Types of association of the porphyrins studied and the possibility of intra- and intermolecular hydrogen bonds are discussed.
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State Science Center, Institute of Biophysics, Ministry of Public Health, Moscow 123182. Institute of Biological and Medicinal Chemistry, Russian Academy of Medical Science, Moscow 119832, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 535–541, April, 1998.
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Babushkina, T.A., Ponomarev, G.V. 1H NMR spectroscopic study of hydrogen bonds and mobile NH protons in aqueous solutions of porphyrin ions. Chem Heterocycl Compd 34, 474–479 (1998). https://doi.org/10.1007/BF02290889
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DOI: https://doi.org/10.1007/BF02290889