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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Self-assembled NiO-ZrO _2 nanocrystals with mesoscopic void space: An efficient and green catalyst for C-S cross-coupling reaction in water
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Self-assembled NiO-ZrO _2 nanocrystals with mesoscopic void space: An efficient and green catalyst for C-S cross-coupling reaction in water

机译:具有介观空隙空间的自组装NiO-ZrO _2纳米晶体:水中C-S交叉偶联反应的高效绿色催化剂

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摘要

New NiO-ZrO _2 nanocrystals (MNZ-1) with mesoscopic self-assembly have been synthesized by using a non-ionic surfactant as the structure directing agent (SDA) via evaporation induced self-assembly (EISA) method. Powder X-ray diffraction (PXRD), N _2 sorption study and transmission electron microscopic (TEM) image analyses revealed the cubic structure, mesoporosity and mesoscopic self-assembly of ca. 7.0 nm sized tiny nanocrystals in the material. MNZ-1 catalyzes the aerobic aryl-sulfur cross-coupling reactions for a series of aryl-iodides with 4-chlorothiophenol in environment friendly water medium at elevated as well as room temperature. Pure ZrO _2 mesoporous nanocrystals are inactive, whereas pure NiO nanocrystals showed much lower catalytic activity under similar reaction conditions. The MNZ-1 nanocatalyst is completely non-air sensitive, inexpensive and effective for the synthesis of a series of essential biomolecules derived from diaryl sulfides.
机译:以非离子表面活性剂为结构定向剂(​​SDA),通过蒸发诱导自组装(EISA)方法合成了具有介观自组装的新型NiO-ZrO _2纳米晶体(MNZ-1)。粉末X射线衍射(PXRD),N _2吸附研究和透射电子显微镜(TEM)图像分析揭示了Ca的立方结构,介孔性和介观自组装。材料中有7.0 nm大小的微小纳米晶体。 MNZ-1在环境友好的水介质中,在升高的温度以及室温下,催化一系列芳基碘与4-氯硫代苯酚的好氧芳基-硫交叉偶联反应。纯ZrO _2介孔纳米晶体是无活性的,而纯NiO纳米晶体在相似的反应条件下显示出低得多的催化活性。 MNZ-1纳米催化剂对于合成衍生自二芳基硫醚的一系列基本生物分子而言,是完全非空气敏感,廉价且有效的。

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