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<p>This study aimed to synthesise and characterise a Th(IV) complex formed with the Schiff base quinolinic ligand (<b>L1</b>), using an aqueous-organic method and to study the extraction ability of <b>L1</b> in chloroform towards Th(IV) in aqueous-acid-saline media. The thorium complex revealed IR and UV-VIS spectra that demonstrate its formation, UV-VIS showed a new band at 488&#xa0;nm (LMCT). A neutral Th(IV) complex with two <b>L1</b> ligands and one water molecule coordinated to the Th(IV) centre is proposed (CN of 9). 9 × 10<sup>–4</sup>&#xa0;M of <b>L1</b> extracts 98% of Th(IV) from 1.19 × 10<sup>–4</sup>&#xa0;M thorium nitrate/1&#xa0;mM HNO<sub>3</sub>/0.25 M NaNO<sub>3</sub> medium with a <i>D</i> = 29, in a 1Th:2<b>L1</b> stoichiometry. This asymmetrical heterocyclic ligand is an excellent coordinating and extracting agent for Th(IV).</p>

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Coordinative property and extractive ability of a Quinolinic Schiff base derivative towards Th (IV) ions: complex and extract characterisation

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Flor de María Ramírez,
  • Perla Tatiana Almazán-Sánchez,
  • Ariadna Garza-Ortiz,
  • Verónica García Montalvo,
  • Carlos Camacho Camacho,
  • Rafael Basurto

摘要

This study aimed to synthesise and characterise a Th(IV) complex formed with the Schiff base quinolinic ligand (L1), using an aqueous-organic method and to study the extraction ability of L1 in chloroform towards Th(IV) in aqueous-acid-saline media. The thorium complex revealed IR and UV-VIS spectra that demonstrate its formation, UV-VIS showed a new band at 488 nm (LMCT). A neutral Th(IV) complex with two L1 ligands and one water molecule coordinated to the Th(IV) centre is proposed (CN of 9). 9 × 10–4 M of L1 extracts 98% of Th(IV) from 1.19 × 10–4 M thorium nitrate/1 mM HNO3/0.25 M NaNO3 medium with a D = 29, in a 1Th:2L1 stoichiometry. This asymmetrical heterocyclic ligand is an excellent coordinating and extracting agent for Th(IV).