Amelioration of extraction–separation efficiency of Zn(II), Cd(II) and Pb(II) ions with bis(2-ethylhexyl)phosphoric acid in the presence of a water-soluble N4-type Schiff base ligand

Novel symmetric diimine-Schiff bases and asymmetric triimine-Schiff bases as chemosensors for the detection of various metal ions

“…13 C NMR spectral data (Table 3) are consistent with 1 H NMR spectral data. 13 C NMR spectra of T 1s (Fig. S8) …”

“…13 The proton de-coupled 13 C NMR spectra of triimine-Schiff bases in DMSO-d6 were used as complementary technique for confirming the structure of the prepared Schiff bases and were characterized by a number of sharp peaks which are in good agreement with the expected chemical shift values. 13 C NMR spectral data (Table 3) are consistent with 1 H NMR spectral data. 13 C NMR spectra of T 1s (Fig.…”

Evaluation of Selectivity of Rare Earth Metals by Hexane-1,6-diyl bis(4,4,4-trifluoro-3-oxobutanoate)

“…Liquid-liquid extraction is one of the standardized techniques used for the separation or concentration of organic compounds, salts, and metal ions between aqueous and organic phases, due to its simplicity of equipment and operation. In general, this method simplicity has enhanced the extractability and selectivity of metal ions via optimization of extraction conditions including types of solvents used, ionic strength, and chelating ligands such as phosphates, β-diketones, or oximes [1][2][3]. Furthermore, steric and electronic effects and ion size recognition of the ligands have been used to improve the selectivity of extractants [4].…”

Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

“…This strategy is called synergistic extraction [32][33][34]. Application of masking agents in aqueous phase with a particular selectivity to some analytes is another contrivance for improving the separation factor in solvent extraction process [35][36][37][38][39][40][41][42].…”