Solid-state and solution characterizations of [(TMPA)Cu(II)(SO)] and [(TMPA)Cu(II)(SO)] complexes: Application to sulfite and thiosulfate fast detection.

Sulfite (SO) and thiosulfate (SO) ions are used as food preservative and antichlor agent respectively. To detect low levels of such anions we used Cu(II) complex of the Tris-Methyl Pyridine Amine (TMPA) ligand, denoted L. Formation of [LCu(SO)] (1) and [LCu(SO)] (2) in solution were monitored using UV-Vis, EPR and cyclic voltammetry, while the solid-state X-ray structures of both complexes were solved.