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首页> 外文期刊>Catalysis science & technology >Iron(III) porphyrin supported on metahalloysite: an efficient and reusable catalyst for oxidation reactions
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Iron(III) porphyrin supported on metahalloysite: an efficient and reusable catalyst for oxidation reactions

机译：铁（III）卟啉在元容支持的：一种有效且可重复使用的催化剂用于氧化反应

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摘要

The raw clay minerals kaolinite and halloysite were calcined at controlled temperature and time, to obtain metakaolinite and metahalloysite, respectively. The resulting materials were used as supports for the anionic iron(III) porphyrin [Fe(TDFSPP)] (FePor) and found that only metahalloysite is adequate for FePor immobilization, although the FePor loading on this solid is low. XRPD, FTIR and solid UV-Vis spectroscopies, and textural analysis confirmed metakaolinite and metahalloysite formation and FePor immobilization on metahalloysite. The catalytic activity of the metahalloysite-supported FePor (FeMhallo) was evaluated in heterogeneous oxidation reactions using iodosylbenzene as oxidant and cyclooctene, cyclohexane, or n-heptane as substrate, obtaining expressive product yields for all the substrates. At the end of the oxidation, the catalyst was recovered from the reaction medium and used in a further reaction, which also afforded appreciable results. In competitive catalytic reactions using cyclohexane and n-heptane as substrates, FeMhallo is not significantly selective for any of the substrates.
机译：在受控的温度和时间下，原始的粘土矿物高岭石和升降岩分别获得了Metakaolite和Metahaloysite。将所得的材料用作阴离子铁（III）卟啉[Fe（TDFSPP）]（Fepor）的支撑，发现只有元容量足以固定fepor固定，尽管该固体上的泡沫负载较低。 XRPD，FTIR和固体UV-VIS光谱镜以及纹理分析证实了Metakaolite和Metahaloysite的形成以及元halyoysite上的Fepor固定。使用碘苯乙烯作为氧化剂和环辛，环己烷，或N-己烷作为底物，在异质氧化反应中评估了元霍酰基支持的Fepor（FEMHALLO）的催化活性，以获得所有底物。在氧化结束时，从反应培养基中回收了催化剂，并用于进一步的反应，这也可获得可观的结果。在使用环己烷和N-己烷作为底物的竞争性催化反应中，FEMHALLO对任何底物都没有显着选择性。

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