The Experts below are selected from a list of 66 Experts worldwide ranked by ideXlab platform
Enric Casassas - One of the best experts on this subject based on the ideXlab platform.
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polarography and stripping voltammetry of metal polycarboxylate complexes complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: Jose Manuel Diazcruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
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Polarography and stripping voltammetry of metal–polycarboxylate complexes: Complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: José Manuel Díaz-cruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
Cristina Ariño - One of the best experts on this subject based on the ideXlab platform.
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polarography and stripping voltammetry of metal polycarboxylate complexes complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: Jose Manuel Diazcruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
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Polarography and stripping voltammetry of metal–polycarboxylate complexes: Complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: José Manuel Díaz-cruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
Miquel Esteban - One of the best experts on this subject based on the ideXlab platform.
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polarography and stripping voltammetry of metal polycarboxylate complexes complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: Jose Manuel Diazcruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
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Polarography and stripping voltammetry of metal–polycarboxylate complexes: Complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: José Manuel Díaz-cruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.
J A Delaire - One of the best experts on this subject based on the ideXlab platform.
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evidence for hydrophobic effects in water soluble polymers comparison between photoinduced charge separation in polyacrylic and Polymethacrylic Acids
New Journal of Chemistry, 1992Co-Authors: M Sanquerbarrie, J A DelaireAbstract:Ohotoinduced electron transfer has been studied in two different water-soluble polymers: polyacrylic acid PAH and Polymethacrylicacid PLAH in order to elucidate the role of preexisting hydrophobic microdomains present in the second polymer at low pH and to study the influence of the ionization of the polymer chain in both cases. The photophysical properties of diphenylanthracene (DPA) covalently bound to both polymers are largely influenced by the polymeric environment
José Manuel Díaz-cruz - One of the best experts on this subject based on the ideXlab platform.
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Polarography and stripping voltammetry of metal–polycarboxylate complexes: Complexes of cadmium and zinc with polyacrylic and Polymethacrylic Acids
Electroanalysis, 1991Co-Authors: José Manuel Díaz-cruz, Cristina Ariño, Miquel Esteban, Enric CasassasAbstract:Complex formation of Zn(II) and Cd(II) with Polymethacrylic acid (PMA) and polyacrylic acid (PAA) is studied by sampled direct current, normal pulse, reverse pulse, and differential pulse polarography and by differential pulse anodic stripping voltammetry (DPASV). Titrations of Zn(II) or Cd(II) with partially neutralized PMA or PAA by DPASV allow the precise determination of the apparent formation constant K of the four systems. The two Zn(II) systems appear to be labile on the different time scales of the several techniques, without remarkable complications due to secondary phenomena. Their K values, determined by all techniques, agree satisfactorily. The two Cd(II) systems, and especially the Cd/PAA system, show rather involved behavior, which tends to normality when the degree of neutralization αn of the polycarboxylates increases. Both slow kinetics and ligand adsorption coupled with induced Cd(II) adsorption (evidenced by maxima on the normal pulse polarograms) seem to be present. For all αn values, DPASV yields higher estimates of K than do polarographic techniques.