Complexation of Zn Arylporphyrinates with Leucine Methyl Ester |
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Authors: | Mamardashvili G. M. Storonkina O. E. Mamardashvili N. Zh. |
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Affiliation: | (1) Institute of Solution Chemistry, Russian Academy of Sciences, ul. Akademicheskaya 1, Ivanovo, 153045, Russia;(2) Ivanovo State University, Ivanovo, Russia |
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Abstract: | Extra coordination of L-leucine methyl ester with seventeen different Zn arylporphyrinates is studied by spectrophotometric titration and capability of Zn porphyrinates with the active OH groups to recognize LeiOCH3 in toluene at 20°C is determined. The formation of associates of the composition amino acid ether–porphyrinate depending on the substituent positions in a macrocycle is studied by the 1H NMR method. The most strong donor–acceptor bonds between Zn porphyrinate and LeiOCH3 are observed in the case of pyridine-substituted porphyrins and porphyrins with phenyl rings containing electron-donor substituents in the m-position. The best recognizing capabilities with respect to leucine are shown by Zn porphyrinates with di- and tetra-4-OH-phenyl substitution in the meso-positions of a macrocycle. |
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