Abstract

This works reports that tetrasulfonated cobalt(II) phthalocyanine (Co(II)TSPc) catalyzes reduction of selenite (SeO₃²⁻), the one of the most toxic form of selenium, to slightly toxic Se(0) by dithionite (S₂O₄²⁻) in neutral aqueous solutions. The overall reaction mechanism involves rapid reduction of Co(II)TSPc to Co(I)TSPc by dithionite followed by slower oxidation of Co(I)TSPc by selenite. Reaction of Co(I)TSPc with selenite proceeds via two consecutive steps, i.e. the formation of complex between reactants followed by electron transfer from Co(I)-ion to selenite and dissociation of reduced selenite species from Co(II)-ion.

中文翻译：

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四磺化钴酞菁对连二亚硫酸盐还原亚硒酸盐的催化作用

摘要

这项工作报告说，四硫代酞菁钴（II）（Co（II）TSPc）催化亚硒酸盐（SeO ₃ ^2-）（一种最剧毒的硒）被连二亚硫酸盐（S ₂还原为低毒的Se（0））。O ₄ ^2-）在中性水溶液中。总体反应机理包括连二亚硫酸盐将Co（II）TSPc快速还原成Co（I）TSPc，然后亚硒酸盐将Co（I）TSPc缓慢氧化。Co（I）TSPc与亚硒酸盐的反应通过两个连续的步骤进行，即在反应物之间形成络合物，然后电子从Co（I）离子转移至亚硒酸盐，还原的亚硒酸盐物种从Co（II）离子解离。