N-Allyl-N-Benzoyl-Bisthiourea as N,O,S-Atom Containing Ligand for Determination of Bi(III)

Abstract

Abstract: We developed a simple, accurate, sensitive and reliable method for the selective determination of Bi(III), which is based on spectrophotometric measurement of water soluble yellow bismuth-ligand complexes. The linear calibration ranges and limit of detection for the proposed method was 1.00∙10-6 - 1.00∙10-3 and 2.00∙10-8 mol/L, respectively. The complexes were prepared in mixing of sample with the organic-solvent solution of chelating agent. The influence of the organic solvent amount was studied. Chelating agent were firstly synthesized though the reaction of thiosemicarbazides with aroyl isothiocyanates. The mentioned ligands are bisthioureas with sulfur, nitrogen and oxygen donor atoms. The quantum-chemical calculations were carried out for detailed understanding of the complex formation reaction for received compounds.