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<p>Potentiometric data of the ternary VO<sup>2+</sup>-picolinic acid (Pic<sup>−</sup>) complexes with the amino acids: glycine (Gly, L<sup>−</sup>), isoleucine (Ile, L<sup>−</sup>), valine (Val, L<sup>−</sup>), arginine (Arg, L<sup>−</sup>), aspartic acid (Asp, L<sup>2−</sup>), and histidine (His, L<sup>−</sup>) previously determined by our group at 25&#xa0;°C and 1.0&#xa0;mol·dm<sup>−3</sup> NaCl and analyzed using the regular <i>Z</i><sub>B</sub> vs pH data, were re-determined using the reduced formation functions <i>Z</i><sub>Bfondo</sub> and their pH dependence. Visualization of the <i>Z</i><sub>Bfondo</sub> vs pH data trends and details on the stoichiometric composition of the complexes formed in aqueous solution were derived and are presented in this work.</p>

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Re-determination of the stability constants of Ternary Oxovanadium (IV) Complexes with Picolinic Acid and Some Amino Acids Using Reduced Formation Functions

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Vito Lubes,
  • Mary Lorena Araujo,
  • Lino Hernandez

摘要

Potentiometric data of the ternary VO2+-picolinic acid (Pic−) complexes with the amino acids: glycine (Gly, L−), isoleucine (Ile, L−), valine (Val, L−), arginine (Arg, L−), aspartic acid (Asp, L2−), and histidine (His, L−) previously determined by our group at 25 °C and 1.0 mol·dm−3 NaCl and analyzed using the regular ZB vs pH data, were re-determined using the reduced formation functions ZBfondo and their pH dependence. Visualization of the ZBfondo vs pH data trends and details on the stoichiometric composition of the complexes formed in aqueous solution were derived and are presented in this work.