Five types of non-heme iron complexes, coordinated with imidazole, pyrazole, triazine and pyridine ligands, which had been previously synthesized, were used in the following studies. Among these complexes, the mer-[FeCl₃(terpy)] complex showed the highest catalytic activity for the oxidative degradation of 2,4,6-tribromophenol (TrBP) using KHSO₅ as an oxygen donor. The turnover numbers for the degradation and debromination of TrBP in the mer-[FeCl₃(terpy)]/KHSO₅ catalytic system were estimated to be 1890 ± 1 and 4020 ± 216, respectively. The catalytic activity was significantly inhibited at pH 4–7 in the presence of a humic acid, a major component of landfill leachates. However, the percent of TrBP degradation and debromination increased at pH 8. GC/MS analyses showed that a major oxidation product was 2,6-dibromo-p-benoquinone (DBQ) and its level decreased with increasing reaction time, suggesting that organic acids (identified by LC/TOF-MS) are formed via the ring-cleavage of DBQ. Mineralization to CO₂ was observed to be 15% as a result of the oxidation for a 3 h period, where TOC values before and after the reaction were measured. Absorption spectra of mer-[FeCl₃(terpy)] with m-chloroperoxybenzoic acids as an oxygen donor in acetonitrile showed that a center metal, Fe, formed a peroxide complex with the oxygen donor.

中文翻译：

---

使用铁（III）与咪唑，吡唑，三嗪和吡啶配体的配合物催化氧化2,4,6-三溴苯酚

在以下研究中使用了五种类型的非血红素铁配合物，它们与咪唑，吡唑，三嗪和吡啶配体配合使用，这些配合物已预先合成。在这些配合物中，聚体- [的FeCl ₃（三联吡啶）]复合物显示了使用KHSO 2,4,6-三溴苯酚（TRBP）的氧化劣化的最高的催化活性₅作为氧供体。为TRBP在退化和脱溴的转换数聚体- [的FeCl ₃（三联吡啶）] / KHSO ₅催化系统估计分别为1890±1和4020±216。在腐殖酸（垃圾填埋场渗滤液的主要成分）存在下，在pH 4–7下，催化活性被显着抑制。但是，在pH 8时，TrBP降解和脱溴的百分数增加。GC/ MS分析表明，主要的氧化产物是2,6-二溴对苯甲醌（DBQ），其含量随反应时间的增加而降低，表明有机酸（通过LC / TOF-MS识别）通过DBQ的​​环裂解形成。观察到3小时的氧化结果，矿化成CO _2的含量为15％，其中测量了反应前后的TOC值。的吸收光谱聚体- [的FeCl ₃（三联吡啶）]与间-氯过氧苯甲酸作为乙腈中的氧供体表明，中心金属Fe与氧供体形成了过氧化物配合物。