Producción Científica Profesorado

Aroylthioureas: new organic ionophores for heavy-metal ion selective electrodes



Rojas Lima, Susana

2001

Elena Otazo-Sánchez, Leonel Pérez-Marín, Osvaldo Estévez-Hernández, Susana Rojas-Lima, Julián Alonso-Chamarro. Aroylthioureas: new organic ionophores for heavy-metal ion selective electrodes. J. Chem. Soc., Perkin Trans. 2, 2211-2218 (2001). DOI: 10.1039/B102029N


Abstract


Thiourea derivatives (46 aroylthioureas) having different substituents close to the sulfur atom were synthesized and their ionophore potential in ion selective electrodes (ISEs) was examined. Structural considerations were taken into account based on the corresponding heavy-metal ISE parameters. As ionophores, some 1-furoyl-3-substituted thioureas (series 2) gave the best results in Pb(II), Hg(II) and Cd(II) ISEs. The strong intramolecular hydrogen bond in series 2 allows ligand interaction only through the CS group. Substituents on the furan and phenyl rings give rise to low solubility in the membrane plasticizer. 3-Alkyl substituted furoylthioureas improve solubility but enhance oxidative processes with chain length. New X-ray diffraction (XRD) structures and theoretical DFT calculations were considered in the analysis of the substituent influence on the selectivity of ISEs. These new ionophores have advantages because of their stability, simple synthesis and easy modification of the sulfur binding ability resulting from substitution.



Producto de Investigación




Artículos relacionados

Preparation of Seven- and Eight-Membered Boron Heterocycles from Different Salen Ligands and Arylbor...

Preparation of N-aryl-substituted spiro-?-lactams via Staudinger cycloaddition

Stereoselective addition of allylmagnesium chloride to the CN bond of [4.3.0] boron heterobicycles

Enantioselective synthesis of ?-amino acids. Part 11: Diastereoselective alkylation of chiral deriva...

Synthesis of nitrogen-, oxygen- and sulphur-containing tripodal ligands with a trimethylbenzene core...

Synthesis, crystal structures, and quadratic nonlinear optical properties in a series of pushpull bo...

3-Benzoyl-2-isopropyl-4-alkyloxazolidin-5-ones as Efficient and Inexpensive Sources of Enantiopure ?...

An efficient potassium cyanide-promoted synthesis of 2-arylbenzoxazoles from [4.3.0]boron heterobicy...

Furocoumarins of three species of the genus Dorstenia

Diastereoselective alkylation of chiral glycinate derivatives containing the ?-phenylethyl group.