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

Química Nova

Wagner José Barreto²  Sônia Regina Giancoli Barreto²  Ivanira Moreira²  Yoshio Kawano¹ 

[1] ,Universidade Estadual de Londrina Departamento de Química Londrina PR ,Brasil

关键词: pyrocatechol;    iron oxide;    sodium thiosulfate;   

DOI  :  10.1590/S0100-40422006000600021

来源: SciELO

【 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 S2O3(2-) 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】

CC BY-NC   
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