Abstract
Electronic absorption spectra of solutions of salts formed by alkyl-substituted biladiene-ac and bilatriene with hydrobromic acid were analyzed with respect to salt concentration and solvent nature. The major light-absorbing species of the pigments in benzene and dimethyl sulfoxide were found to be the corresponding onium ions. Reduction of the pigment concentration in dimethylformamide and pyridine favors solvolytic dissociation of the salt with formation of neutral ligand species. Structural and solvation factors responsible for the stability of chemical forms of linear tetrapyrroles in solution are discussed.
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Original Russian Text © S.P. Makarova, E. V. Rumyantsev, E. V. Antina, 2008, published in Zhurnal Obshchei Khimii, 2008, Vol. 78, No. 9, pp. 1539–1543.
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Makarova, S.P., Rumyantsev, E.V. & Antina, E.V. Effect of structural and solvation factors on the chromophore properties and stability of chemical forms of linear tetrapyrroles. Russ J Gen Chem 78, 1770–1774 (2008). https://doi.org/10.1134/S107036320809020X
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DOI: https://doi.org/10.1134/S107036320809020X