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

被引：3

作者：

Rostasova, Ingrida ^{[1
]}

Vilkova, Maria ^{[2
]}

Vargova, Zuzana ^{[1
]}

Gyepes, Robert ^{[3
,4
]}

Litecka, Miroslava ^{[1
]}

Kubicek, Vojtech ^{[3
]}

Imrich, Jan ^{[2
]}

Lukes, Ivan ^{[3
]}

机构：

[1] Safarik Univ, Fac Sci, Dept Inorgan Chem, Moyzesova 11, SK-04154 Kosice, Slovakia

[2] Safarik Univ, Fac Sci, NMR Lab, Moyzesova 11, SK-04154 Kosice, Slovakia

[3] J Selye Univ, Fac Educ, Dept Chem, Bratislavska Cesta 3322, SK-94501 Komarno, Slovakia

[4] Charles Univ Prague, Dept Inorgan Chem, Fac Sci, Hlavova 2030-8, CZ-12843 Prague 2, Czech Republic

来源：

NEW JOURNAL OF CHEMISTRY | 2017年 / 41卷 / 15期

关键词：

AQUEOUS-SOLUTION; MOLECULAR RECOGNITION; CARBONIC-ANHYDRASE; CRYSTAL-STRUCTURES; PHOSPHONATES; ZINC(II); MODEL; BINDING;

D O I：

10.1039/c7nj00254h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The interaction of aminomethylphosphonic acid (H(2)amp) with the Zn(II)-cyclen complex and the formation of ternary complexes was studied by potentiometry and P-31 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 (logK similar to 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.

引用

页码：7253 / 7259

页数：7

共 27 条

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