Iron oxide and pyrocatechol: a spectroscopy study of the reaction products

Química Nova

Moreira, Ivanira¹  Barreto, Wagner José¹  Kawano, Yoshio¹  Universidade de São Paulo, São Paulo, Brasil¹  Universidade Estadual de Londrina, Londrina, Brasil¹  Barreto, Sônia Regina Giancoli¹ 

关键词: pyrocatechol;    iron oxide;    sodium thiosulfate.;   

DOI  :  10.1590/S0100-40422006000600021

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na2S2O3) in aqueous medium (pH 7) was investigated. Pyrocatechol suffers autoxidation and coordinates with Fe3+ in solution. The presence of S2O32- in solution was fundamental to generate and stabilize the pyrocatechol oxidation products as o-semiquinones. This compound was isolated and its structure characterized using FT-IR, EPR and UV-Vis Spectroscopy as [CTA][Fe(SQ)2(Cat)]. A thermal mass loss mechanism was proposed based on Thermogravimetric Analysis (TG) to support the structural characterization.

【 授权许可】

Unknown