Preparation and characterization of organic-inorganic adduct of dinaphtosulfide macrocyclic diamide and silicotungstic acid: study of interaction in solid and solution phase

摘要

An adduct compound containing dinaphtosulfide macrocyclic diamide and silicotungstic acid was prepared and characterized by elemental analyses, IR, UV-VIS spectrophotometry and diffuse reflectance spectrometry. The stoichiometry and stability of adduct were studied by conductometry in nitrobenzene (NB) solvent. This is the first report of the interaction of crown ether containing sulfur heteroatom and heteropoly acid. The interaction of the adduct compound with Hg2+ was studied by spectrophotometric and pH-metric methods in NB solvent. The formation constant of the Hg2+-adduct complex was calculated from the computer fitting of the obtained data. The extraction of Hg2+ and Pb2+ was studied from aqueous solution using this adduct compound.