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

被引：11

作者：

Barreto, Wagner Jose ^{[1
]}

Giancoli Barreto, Sonia Regina

Moreira, Ivanira

Kawano, Yoshio

机构：

[1] Univ estadul Londrina, Dept Quim, BR-86051990 Londrina, PR, Brazil

[2] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo, Brazil

来源：

QUIMICA NOVA | 2006年 / 29卷 / 06期

关键词：

pyrocatechol; iron oxide; sodium thiosulfate;

D O I：

10.1590/S0100-40422006000600021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na, S2O3) 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.

引用

页码：1255 / 1258

页数：4

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