title: Simultaneous determination of thermodynamic and kinetic parameters of aminopolycarbonate complexes of cobalt(II) and nickel(II) based on isothermal titration calorimetry data.
abstract: The influence of the different side chain residues on the thermodynamic and kinetic parameters for complexation reactions of the Co2+and Ni2+ions has been investigated by using the isothermal titration calorimetry (ITC) technique supported by potentiometric titration data. The study was concerned with the 2 common tripodal aminocarboxylate ligands, namely, nitrilotriacetic acid and N-(2-hydroxyethyl) iminodiacetic acid. Calorimetric measurements (ITC) were run in the 2-(N-morpholino)ethanesulfonic acid hydrate (2-(N-morpholino) ethanesulfonic acid), piperazine-N,N'-bis(2-ethanesulfonic acid), and dimethylarsenic acid buffers (0.1 mol L-1, pH 6) at 298.15 K. The quantification of the metal-buffer interactions and their incorporation into the ITC data analysis enabled to obtain the pH-independent and buffer-independent thermodynamic parameters (K, ΔG, ΔH, and ΔS) for the reactions under study. Furthermore, the kinITC method was applied to obtain kinetic information on complexation reactions from the ITC data. Correlations, based on kinetic and thermodynamic data, between the kinetics of formation of Co2+and Ni2+complexes and their thermodynamic stabilities are discussed.
authors.affiliation: Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Tesmar
authors.affiliation: Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Wyrzykowski
authors.affiliation: AFFINImeter Scientific and Development Team, S.L. Ed. Emprendia, Software 4 Science Developments, A Coruña, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Muñoz
authors.affiliation: Cerko Sp. z o.o. S.K, Gdynia, Poland.
authors.forename: Bogusław
authors.initials: B
authors.lastname: Pilarski
authors.affiliation: Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Pranczk
authors.affiliation: Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland.
authors.forename: Dagmara
authors.initials: D
authors.lastname: Jacewicz
authors.affiliation: Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland.
authors.forename: Lech
authors.initials: L
authors.lastname: Chmurzyński
mesh_terms: D002151:Calorimetry; D003035:Cobalt / Q000737:chemistry*; D007098:Imino Acids / Q000737:chemistry*; D007700:Kinetics; D009532:Nickel / Q000737:chemistry*; D009571:Nitrilotriacetic Acid / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D007098:Imino Acids; D003035:Cobalt; D009532:Nickel; D009571:Nitrilotriacetic Acid; C008109:iminodiacetic acid
keywords: Co(II) and Ni(II) complexes; buffer; competitive binding; isothermal titration calorimetry; kinITC method; thermodynamic parameters