Acid base interactions of octaphenyltetrapyrazinoporphyrazine and its complex with lutetium(III) in proton-donor media |
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Authors: | O. G. Khelevina E. A. Kokareva A. S. Bubnova Yu. V. Romanenko V. P. Kulinich G. P. Shaposhnikov |
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Affiliation: | (1) Ivanovo State University of Chemical Technology, pr. F. Engel’sa 7, Ivanovo, 153000, Russia |
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Abstract: | Acid base interactions of octaphenyltetrapyrazinoporphyrazine and its complex with lutetium(III) in acetic and trifluoroacetic acid media were studied, and parameters characterizing equilibria between the acid and base forms were determined. Acid-base interactions of octaphenyltetrapyrazinoporphyrazine involve primarily nitrogen atoms in the pyrazine fragments, while its lutetium(III) complex undergoes protonation at the meso-nitrogen atoms. |
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