Berthonnaud L, Esmieu C, Mallet-Ladeira S, Hureau C. Solid-state and solution characterizations of [(TMPA)Cu(II)(SO
3)] and [(TMPA)Cu(II)(S
2O
3)] complexes: Application to sulfite and thiosulfate fast detection.
J Inorg Biochem 2021;
225:111601. [PMID:
34597885 DOI:
10.1016/j.jinorgbio.2021.111601]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/03/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
Sulfite (SO32-) and thiosulfate (S2O32-) 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(SO3)] (1) and [LCu(S2O3)] (2) in solution were monitored using UV-Vis, EPR and cyclic voltammetry, while the solid-state X-ray structures of both complexes were solved. In addition, we also evaluated the pH range in which the complexes are stable, and the anions binding affinity values for the [LCu(solvent)]2+ (3) parent complex. As a matter of illustration, we determined the sulfite content in a commercial crystal sugar.
Collapse