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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Covalently immobilized ionic liquids on single layer nanosheets for heterogeneous catalysis applications
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Covalently immobilized ionic liquids on single layer nanosheets for heterogeneous catalysis applications

机译：在单层纳米片上共价固定的离子液体，用于异质催化作用

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摘要

Ionic liquids (ILs) have attracted significant attention because of their unique chemical and physical properties. Immobilization of ILs on solid materials helps increase their efficiency and facilitate their recycling. In our present work, ILs were immobilized on a-zirconium phosphate (ZrP) single layer nanosheets by a post-grafting method. The immobilized ILs were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The characterization results supported that the ILs were covalently grafted onto ZrP nanosheets via the chemical reaction of ethoxyl silane groups in ILs with the surface hydroxyl groups on ZrP nanosheets. A high density of grafting of ILs on individual ZrP nanosheets was achieved. The immobilized ILs on individual ZrP nanosheets can be uniformly dispersed in polar chemicals and are readily accessible. When applied as a heterogeneous catalyst for Knoevenagel condensation under a solvent-free condition, such immobilized ILs exhibited high efficiency and can be easily recycled and reused.
机译：离子液体（ILS）由于其独特的化学和物理性质而引起了重要的关注。 ILS对固体材料的固定有助于提高其效率并促进其回收。在我们目前的工作中，通过接枝方法将ILS固定在磷酸锆（ZrP）单层纳米液上。通过傅立叶变换红外光谱（FTIR），X射线光电子能谱（XPS），热重分析（TGA），X射线衍射（XRD）和扫描电子显微镜（SEM）的固定IL。表征结果支持通过在ZRP纳米片上的表面羟基的ILS中的乙氧基硅烷基团的化学反应将IL与乙氧基硅烷基团的化学反应共价接枝。实现了在单个ZRP纳米片上的ILS嫁接的高密度。单个ZRP纳米片上的固定IL可以均匀地分散在极性化学物质中，并且易于易于接近。当在无溶剂条件下施加作为knoevenagel缩合的非均相催化剂时，这种固定的ILS表现出高效率并且可以容易地再循环并重复使用。

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  • 作者

    Zhou Yingjie; Liu Jingjing; Huang Rongcai; Zhang Meng; Xiao Min; Meng Yuezhong; Sun Luyi;

  • 作者单位

    Univ Connecticut Inst Mat Sci Dept Chem &

    Biomol Engn Storrs CT 06269 USA;

    Univ Connecticut Inst Mat Sci Dept Chem &

    Biomol Engn Storrs CT 06269 USA;

    Univ Connecticut Inst Mat Sci Dept Chem &

    Biomol Engn Storrs CT 06269 USA;

    Sun Yat Sen Univ Key Lab Low Carbon Chem &

    Energy Conservat Guangd State Key Lab Optoelect Mat &

    Technol Sch Phys &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Key Lab Low Carbon Chem &

    Energy Conservat Guangd State Key Lab Optoelect Mat &

    Technol Sch Phys &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Key Lab Low Carbon Chem &

    Energy Conservat Guangd State Key Lab Optoelect Mat &

    Technol Sch Phys &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Univ Connecticut Inst Mat Sci Dept Chem &

    Biomol Engn Storrs CT 06269 USA;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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