Journal of Inorganic Biochemistry ( IF 3.9 ) Pub Date : 2021-09-22 , DOI: 10.1016/j.jinorgbio.2021.111601 Léonie Berthonnaud 1 , Charlène Esmieu 2 , Sonia Mallet-Ladeira 2 , Christelle Hureau 2
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.
中文翻译:
[(TMPA)Cu(II)(SO3)] 和 [(TMPA)Cu(II)(S2O3)] 配合物的固态和溶液表征:在亚硫酸盐和硫代硫酸盐快速检测中的应用
亚硫酸盐(SO 3 2-)和硫代硫酸盐(S 2 O 3 2-)离子分别用作食品防腐剂和抗氯剂。为了检测低水平的此类阴离子,我们使用了三甲基吡啶胺 (TMPA) 配体的 Cu(II) 络合物,表示为 L。 [LCu(SO 3 )] ( 1 ) 和 [LCu(S 2 O 3 )的形成] ( 2 ) 使用UV-Vis、EPR 和循环伏安法监测溶液中的溶液,同时解析了两种配合物的固态X 射线结构。此外,我们还评估了配合物稳定的 pH 值范围,以及 [LCu(solvent)] 2+ ( 3) 父情结。作为说明,我们测定了商业冰糖中的亚硫酸盐含量。