The complexation of metal ions with various organic ligands in water: prediction of stability constants by QSPR ensemble modelling

2015 ◽  
Vol 83 (1-2) ◽  
pp. 89-101 ◽  
Author(s):  
Vitaly Solov’ev ◽  
Natalia Kireeva ◽  
Svetlana Ovchinnikova ◽  
Aslan Tsivadze
Keyword(s):  
Metal Ions ◽  
Stability Constants ◽  
Organic Ligands ◽  
Ensemble Modelling

scholarly journals Stability constants of Nicotinic acid (vitamin B3) complexes with transition metal ions

2020 ◽  
Vol 2 (7) ◽  
pp. 136-138
Author(s):  
Shalini Dengle ◽  
Mahesh Shivoorkar ◽  
Momin Nishad Parvin ◽  
Ayesha Nuzat Durrani
Keyword(s):  
Transition Metal ◽  
Nicotinic Acid ◽  
Metal Ions ◽  
Stability Constants ◽  
Transition Metal Ions ◽  
Vitamin B3

Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands

2019 ◽  
Vol 48 (27) ◽  
pp. 10011-10022 ◽  
Author(s):  
Hui-Sheng Wang ◽  
Cheng-Ling Yin ◽  
Zhao-Bo Hu ◽  
Yong Chen ◽  
Zhi-Quan Pan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Transition Metal Ions ◽  
Relaxation Behavior ◽  
Organic Ligands ◽  
Chelating Ligands ◽  
Single Molecule Magnet

Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.

Automation of Optical Control of Metal Ions in Liquid Using a Smartphone

2019 ◽  
Vol 970 ◽  
pp. 290-296
Author(s):  
Nadezhda V. Saranchina ◽  
Eldar V. Urazov ◽  
Maria M. Gavrilenko ◽  
Nataliya A. Gavrilenko
Keyword(s):  
Metal Ions ◽  
Digital Image ◽  
Water Samples ◽  
Sampling Time ◽  
Automated Detection ◽  
Organic Ligands ◽  
Optical Control ◽  
Linear Calibration ◽  
Automatic Methods ◽  
Signal Treatment

A new automated smartphone-based assay for metals ions determination based on the color reaction with organic ligands was developed. Quantification was performed by measuring the color of the polymer optode. This offers a smartphone-based alternative to the colorimeric method for signal treatment usually employed in automatic methods. The technique enabled linear calibration within the range 1–500 ppb of metals ions. The sampling time used for this concentration range was 15 min. The method was also tested for the quantification of metals ions in water samples, followed by digital image treatment of the optode. The automated detection metals ions approach was demonstrated by applying smartphone to the analysis of metals ions. Relative recoveries of the analytes ranged from 87 % to 105 %. The described procedure has the potential to be a fully automated online smartphone platform for the purpose of routine onsite water analysis.

scholarly journals Copper(II)-complexation by non enzymatically glycated peptides

2004 ◽  
Vol 22 (SI - Chem. Reactions in Foods V) ◽  
pp. S106-S108
Author(s):  
S. T Seifert ◽  
R. Krause ◽  
K. Gloe ◽  
T. Henle
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Stability Constants ◽  
Maillard Reaction ◽  
Metal Binding ◽  
Maillard Reaction Products ◽  
Reaction Products ◽  
Nonenzymatic Glycation ◽  
The Stability

The purpose of our work was to examine the metal binding abilities of selected peptide bound Maillard reaction products (MRPs). The N<sup>α</sup>-hippuryl-protected MRPs N<sup>ε</sup>-fructoselysine and N<sup>ε</sup>-carboxymethyllysine were synthesised and measurement of stability constants for complexes formed with the physiologically important metal ions copper(II) and zinc(II) was carried out in aqueous solution (T = 298.1 K; I = 0.1M KNO<sub>3</sub>) using pH-potentiometry. The stability constants of N<sup>ε</sup>-fructoselysine and N<sup>ε</sup>-carboxymethyllysine with Cu(II) proved that new coordination centres are formed by the nonenzymatic glycation of proteins. With zinc(II) no complexation was observed. Physiological consequences are discussed, but further studies are necessary in order to clarify the effects of this phenomenon.

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