Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/24383
Title: Potentiometric study on complexation of divalent transition metal ions with amino acids and adenosine 5′-Triphosphate
Authors: Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.
Aydın, Rahmiye
Yırıkoğulları, Aslı
AAH-8936-2021
56261495600
36631329000
Keywords: Mixed-ligand complexes
Ternary complexes
Zwitterionic buffers
Formation equilibria
Binary complexes
Aspartic-acid
Copper(II)
CU(II)
ATP
Systems
Thermodynamics
Chemistry
Engineering
Amino acids
Complexation
Copper compounds
Ligands
Metal ions
Nickel
Nickel compounds
Organic acids
Potentiometers (electric measuring instruments)
Titration
Zinc
Zinc compounds
Aspartic acids
Binary complexes
Complexation models
Equilibrium measurements
Glutamic acid
Ionic medium
Potentiometric
Potentiometric data
Potentiometric study
Potentiometric titrations
Stability constants
Ternary complex
Triphosphate
Copper
Issue Date: Nov-2010
Publisher: Amer Chemical
Citation: Aydın, R. ve Yırıkoğulları, A. (2010). "Potentiometric study on complexation of divalent transition metal ions with amino acids and adenosine 5′-Triphosphate". Journal of Chemical and Engineering Data, 55(11), 4794-4800.
Abstract: Potentiometric equilibrium measurements have been performed at 25 degrees C and in an I = 0.10 M KCl ionic medium for the interaction of nickel(II), copper(II), and zinc(II) with adenosine 5'-triphosphate (ATP) and dicarboxylic amino acids (aa): aspartic acid (Asp) and glutamic acid (Glu). The formation of 1:1 and 1:2 binary and 1:1:1 ternary complexes was inferred from the potentiometric titration curves. It was deduced that adenosine 5'-triphosphate acts as a primary ligand in the ternary complexes involving the dicarboxylic amino acids. The complexation model for systems of adenosine 5'-triphosphate (ATP) and the dicarboxylic amino acids with nickel(II), copper(II), and zinc(II) have been established by the "BEST" software from the potentiometric data. Values of Delta log K (log beta(MAB) - (log beta(MA) + log beta(MB))) showed that the ternary complexes are less stable than the binary ones, suggesting that no interaction occurred between the ligands in the ternary complexes. The order of the values of the stability constants of all the ternary complexes was M(II)ATP(Asp) > M(II)ATP(Glu), and the same sequence was found in the binary complexes of metal ions with the amino acids. With respect to the metal ions, the stability constants of binary and ternary complexes decrease in the following order: copper(II) > nickel(II) > zinc(II).
URI: https://doi.org/10.1021/je100402a
https://pubs.acs.org/doi/abs/10.1021/je100402a
http://hdl.handle.net/11452/24383
ISSN: 0021-9568
1520-5134
Appears in Collections:Scopus
Web of Science

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