Thermodynamic parameters for the formation of glycine complexes with magnesium(II), calcium(II), lead(II), manganese(II), cobalt(II), nickel(II), zinc(II) and cadmium(II) at different temperatures and ionic strengths, with particular reference to natural fluid conditions

Casale, Agatino; Robertis, Alessandro De; Stefano, Concetta De; Gianguzza, Antonio; Patanè, Grazia; Rigano, Carmelo; Sammartano, Silvio

doi:10.1016/0040-6031(94)02181-m

Cited by 37 publications

(21 citation statements)

References 22 publications

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“…The generation of complicated structures of the Co x Ni 1−x -Al LTHs (x<0.8) is due to the presence of glycine because the samples prepared under the same experimental conditions without glycine do not give peculiar morphology. It is well known that glycine (Gly, H 2 N-CH 2 -COOH) can coordinate with transition metal ion through carboxylate groups in alkaline medium [31,32]. The presence of glycine induces the formation of Ni (II) glycinate complex (Ni 2+ -Gly) and Co(II) glycinate complex (Co 2+ -Gly) at an early stage of the reaction; the complexes are stable at ambient temprature.…”

Section: Resultsmentioning

confidence: 99%

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

Zhang

Jiang

Yuan

et al. 2011

J Solid State Electrochem

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Nanostructured Co x Ni 1−x -Al layered triple hydroxides (Co x Ni 1−x -Al LTHs) have been successfully synthesized by a facile hydrothermal method using glycine as chelating agent. The samples were characterized by Xray diffraction, thermogravimetry, Fourier transform infrared spectroscopy and scanning electron microscopy. The morphologies of Co x Ni 1−x -Al LTHs varied with the Co content and its effect on the electrochemical behavior was studied by cyclic voltammetry and galvanostatic chargedischarge techniques. Electrochemical data demonstrated that the Co x Ni 1−x -Al LTHs with Co/Ni molar ratio of 3:2 owned the best performance and delivered a maximum specific capacitance of 1,375 Fg −1 at a current density of 0.5 A g −1 and a good high-rate capability. The capacitance retained 93.3% of the initial value after 1,000 continuous charge-discharge cycles at a current density of 2 A g −1 .

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Section: Resultsmentioning

confidence: 99%

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

Zhang

Jiang

Yuan

et al. 2011

J Solid State Electrochem

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“…In this work, the most of these data have been taken from the most common general stability constant databases [ 36 – 41 ] and, when possible, from some reviews and/or papers dedicated to specific ligands and/or cations, by this and other groups ( e.g. , [ 17 , 42 ] for glycine, [ 43 – 46 ] for phosphate, [ 47 ] for thiocyanate, [ 48 , 49 ] for fluoride, [ 50 ] for carbonate, [ 51 , 52 ] for urea, and for [ 43 , 53 , 54 ] sulphate; all considering references therein). Though the most of last references were already taken into account in the above-cited databases, they have been equally consulted because they contain some more specific information like, for example, the parameters for modelling the dependence of the stability constants of various species on ionic strength and/or temperature.…”

Section: Speciation Modelmentioning

confidence: 99%

SALMO and S₃M: A Saliva Model and a Single Saliva Salt Model for Equilibrium Studies

Crea

Stefano

Milea

et al. 2015

Bioinorganic Chemistry and Applications

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A model of synthetic saliva (SALMO, SALiva MOdel) is proposed for its use as standard medium in in vitro equilibrium and speciation studies of real saliva. The concentrations come out from the literature analysis of the composition of both real saliva and synthetic saliva. The chief interactions of main inorganic components of saliva, as well as urea and amino acids, are taken into account on the basis of a complex formation model, which also considers the dependence of the stability constants of these species on ionic strength and temperature. These last features allow the modelling of the speciation of saliva in different physiological conditions deriving from processes like dilution, pH, and temperature changes. To simplify equilibrium calculations, a plain approach is also proposed, in order to take into account all the interactions among the major components of saliva, by considering the inorganic components of saliva as a single 1 : 1 salt (MX), whose concentration is c MX = (1/2)∑c i (c i = analytical concentration of all the ions) and z ion charge calculated as z=±(I/c MX)1/2 = ±1.163. The use of the Single Saliva Salt Model (S3M) considerably reduces the complexity of the systems to be investigated. In fact, only four species deriving from internal ionic medium interactions must be considered.

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“…The determination of formation constants of most amino acid complexes with metal ions have been carried out in aqueous media [8][9][10][11][12][13][14][15][16][17][18]. On the other hand temperature and solvent effects on the stability of the formed complexes have been examined by quite number of researchers [19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Formation Constant of Some Transition Metal Ion- histidine Complexes in Water and Water-dioxane and Evaluation of their Thermodynamic Parameters

Ghiamati

Jalaeian

2017

AJOPACS

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Aims: The formation constants of histidine complexes of Fe (III), Co (II), Ni (II), Cu(II), Zn (II) and Pb (II) at temperatures of 25, 30, 37, 45°C were determined potentiometrically, utilizing modified Bjerrum's method. Potentiometric titrations were carried out in 30% and 70% (v/v); 50% and 50% (v/v) water-dioxane mixtures. Ionic strength of medium was retained at 0.10 M by sodium nitrate. The first and second formation constants were obtained by plotting corrected pH versus concentration of standardized NaOH solution after each addition. Results: The trend for increasing stability in both aqueous solution and in dioxane-water mixtures is as follows: k f pb(II)-His < k f Co (II)-His < k f Zn (II)-His < k f Ni(II)-His < k f Cu(II)-His < k f Fe(III)-His The effects of dioxane and temperature on the formation constants of histidine complexes were examined. Our findings showed that the formation constants of the complexes increased as the

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Thermodynamic parameters for the formation of glycine complexes with magnesium(II), calcium(II), lead(II), manganese(II), cobalt(II), nickel(II), zinc(II) and cadmium(II) at different temperatures and ionic strengths, with particular reference to natural fluid conditions

Cited by 37 publications

References 22 publications

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

SALMO and S₃M: A Saliva Model and a Single Saliva Salt Model for Equilibrium Studies

Determination of the Formation Constant of Some Transition Metal Ion- histidine Complexes in Water and Water-dioxane and Evaluation of their Thermodynamic Parameters

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Thermodynamic parameters for the formation of glycine complexes with magnesium(II), calcium(II), lead(II), manganese(II), cobalt(II), nickel(II), zinc(II) and cadmium(II) at different temperatures and ionic strengths, with particular reference to natural fluid conditions

Cited by 37 publications

References 22 publications

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

Glycine-assisted hydrothermal synthesis of nanostructured Co x Ni1−x –Al layered triple hydroxides as electrode materials for high-performance supercapacitors

SALMO and S3M: A Saliva Model and a Single Saliva Salt Model for Equilibrium Studies

Determination of the Formation Constant of Some Transition Metal Ion- histidine Complexes in Water and Water-dioxane and Evaluation of their Thermodynamic Parameters

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SALMO and S₃M: A Saliva Model and a Single Saliva Salt Model for Equilibrium Studies