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Highly effective oxidation of benzyl alcohols to benzaldehydes over a new hypervalent iodine(III) reagent with the polymeric framework and magnetic feature as reusable heterogeneous nanocatalyst
Reactive & Functional Polymers ( IF 4.5 ) Pub Date : 2019-11-13 , DOI: 10.1016/j.reactfunctpolym.2019.104415
Zahra Shahamat , Firouzeh Nemati , Ali Elhampour

One easy, safe, and effective in situ method for preparing magnetic polyaniline nanocomposite containing hypervalent iodine(III) as a heterogeneous catalyst is presented in this paper. Our approach is based on two steps preparation, firstly synthesis of inorganic and organic nanocomposite material by using solvothermal method under controlled condition and then activation of inorganic partial for catalytic purposes. In this way, Fe3O4-PANI-I(OAc)2 nanocomposite as recoverable heterogeneous nanocatalyst was successfully prepared and its different aspects was investigated by Fourier-transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM) analysis. Conversion of various benzyl alcohols to the corresponding aldehydes in optimized model reaction was evaluated, considering the effects of solvents, reaction time, temperatures and catalyst amount on yield reaction were reported. The results demonstrated that this catalyst have good stability and recyclability even after five times.



中文翻译:

在具有聚合物骨架和磁性特征的新型高价碘(III)试剂上可将苄醇高效氧化为苯甲醛,可重复使用的多相纳米催化剂

本文提出了一种简便,安全,有效的原位制备含高价碘(III)作为多相催化剂的磁性聚苯胺纳米复合材料的方法。我们的方法基于两步制备,首先是在受控条件下通过溶剂热法合成无机和有机纳米复合材料,然后将无机部分活化以进行催化。这样,Fe 3 O 4 -PANI-I(OAc)2成功制备了可回收的非均相纳米催化剂纳米复合材料,并通过傅里叶变换红外光谱(FT-IR),X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM),能量色散X-射线光谱(EDX),热重分析(TGA)和振动样品磁力计(VSM)分析。考虑到溶剂,反应时间,温度和催化剂用量对产率反应的影响,评估了优化的模型反应中各种苄醇向相应醛的转化率。结果表明,即使经过五次,该催化剂也具有良好的稳定性和可回收性。

更新日期:2019-11-13
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