Synthesis and basic properties of bisporphyrinocalix[4]arene |
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| Authors: | Yu. B. Ivanova Yu. I. Churakhina N. Zh. Mamardashvili |
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| Affiliation: | (1) Institute of Solution Chemistry, Russian Academy of Sciences, ul. Akademicheskaya 1, Ivanovo, 153045, Russia;(2) Ivanovo State University of Chemical Technology, Ivanovo, Russia |
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| Abstract: | A bisporphyrinocalix[4]arene was prepared, and its basicity was examined spectrophotometrically. The protonation of tetrapyrrole fragments of the porphyrinocalixarene conjugate in the ethanol-sulfuric acid system occurs in two steps and is described by the Hammett equation. The ionization constants and the concentration intervals of the formation of the mono-and dicationic forms of the bisporphyrinocalixarene were determined. |
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