Jump to main content
Jump to site search

Issue 15, 2017
Previous Article Next Article

Interaction of the Zn(II)–cyclen complex with aminomethylphosphonic acid: original simultaneous potentiometric and 31P NMR data treatment

Author affiliations

Abstract

The interaction of aminomethylphosphonic acid (H2amp) with the Zn(II)–cyclen complex and the formation of ternary complexes was studied by potentiometry and 31P NMR titrations. Data evaluation of each of the methods separately was found to be insufficient. Thus, data obtained from the both methods were simultaneously treated with the computer program OPIUM. The determined stability constants indicated only weak (log K ∼ 3) coordination of aminomethylphosphonic acid through the phosphonate group. The chelating coordination mode with the participation of the amine group was not confirmed. In excess of Zn(II)–cyclen, the formation of dinuclear complexes, in which two Zn(II)–cyclen units are bridged by a phosphonate group, was observed and their presence was confirmed by mass spectrometry. Such a coordination motif is typical for phosphonates in the solid state and also for phosphatases.

Graphical abstract: Interaction of the Zn(ii)–cyclen complex with aminomethylphosphonic acid: original simultaneous potentiometric and 31P NMR data treatment

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Jan 2017, accepted on 06 Jun 2017 and first published on 13 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00254H
Citation: New J. Chem., 2017,41, 7253-7259
  •   Request permissions

    Interaction of the Zn(II)–cyclen complex with aminomethylphosphonic acid: original simultaneous potentiometric and 31P NMR data treatment

    I. Rostášová, M. Vilková, Z. Vargová, R. Gyepes, M. Litecká, V. Kubíček, J. Imrich and I. Lukeš, New J. Chem., 2017, 41, 7253
    DOI: 10.1039/C7NJ00254H

Search articles by author

Spotlight

Advertisements