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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Novel Redox Photocatalyst Pt-TiO2 for the Synthesis of 2-Methylquinolines from Nitroarenes
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Novel Redox Photocatalyst Pt-TiO2 for the Synthesis of 2-Methylquinolines from Nitroarenes

机译：新型氧化还原光催化剂Pt-TiO2用于合成二硝基甲烷的2-甲基喹啉

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摘要

An eco-friendly and efficient procedure for synthesis of 2-methylquinoline derivatives from nitroarenes has been developed by a simple one-pot reaction on the surface of platinum-loaded TiO2 with neat ethanol under UV irradiation without any harsh reagent according to green chemistry. TiO2 catalysts with various amounts of Pt loadings were prepared by photodeposition using chloroplatinic acid solution and characterized by XRD, BET, AFM, HR-TEM, XPS, and DRS. XRD patterns showed that the crystal structure of Pt-TiO2 still remained as anatase phase. The UV-vis spectra indicated that Pt promoted the absorption of visible light. The XPS measurements reveal that platinum particles are present mainly in metallic form. AFM and HR-TEM analysis revealed the presence of nonspherical shaped platinum nanoparticles of the diameter 3-12 nm. Pt-TiO2 on irradiation induces a combined redox reaction with nitroarene and alcohol and this is followed by condensation-cyclization of aniline and oxidation products to give 2-methylquinolines.
机译：通过在紫外线照射下通过纯乙醇的铂负载的TiO 2表面上的简单的单罐反应来开发来自硝基甲烷的2-甲基喹啉衍生物的环保和有效的方法。通过使用氯铂酸溶液光塞沉积制备具有各种Pt载体的TiO2催化剂，其特征在于XRD，BET，AFM，HR-TEM，XPS和DRS。 XRD图案表明，PT-TiO2的晶体结构仍然保持为锐钛矿相。 UV-VIS光谱表明PT促进了可见光的吸收。 XPS测量显示，铂颗粒主要以金属形式存在。 AFM和HR-TEM分析显示出直径3-12nm的非球形铂纳米颗粒的存在。 PT-TiO2在照射中诱导与硝基烯和醇的组合氧化还原反应，然后进行苯胺和氧化产物的冷凝环化，得到2-甲基喹啉。

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