Imidazole-based ionic liquid-stabilized on silica coated Fe₃O₄ magnetic nano particles [nano-Fe₃O₄@SiO₂@(CH₂)₃-Imidazole-SO₃H]Cl as a novel heterogeneous acidic catalyst was designed, synthesized and fully characterized by FT-IR, thermo gravimetric analysis (TGA), differential thermal analysis (DTA), energy-dispersive x-ray spectroscopy (EDX), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), Brunauer–Emmett–Teller (BET) and inductively coupled plasma (ICP) analysis. The nano-structured organo solid catalyst as a novel, mild and full-fledged catalyst was used for the cascade synthesis of 1,8-dioxo-octahydroxanthene derivatives by the condensation reaction between dimedone and various aldehydes at 80 °C under solvent-free conditions. Similarly, dihydropyrano[2,3-c]pyrazole derivatives were synthesized by the one-pot three-component condensation reaction of aldehydes, malononitrile and 3-methyl-1-phenyl-2-pyrazoline-5-one under solvent-free conditions at room temperature. To the knowledge of our science, this is the main investigation on the synthesis of [nano-Fe₃O₄@SiO₂@(CH₂)₃-Imidazole-SO₃H]Cl as a worthy heterogeneous nano magnetic solid acid for acid catalyzed organic reactions.

中文翻译：

---

新型纳米磁性催化剂在合成1,8-二氧-八氢氧杂蒽和二氢吡喃并[2,3- c ]吡唑衍生物中的应用

咪唑基离子液体在二氧化硅包覆的Fe ₃ O ₄磁性纳米颗粒上稳定[纳米Fe ₃ O ₄ @SiO ₂ @（CH ₂）_3-咪唑-SO ₃设计，合成并充分表征了作为新型多相酸性催化剂的H] Cl，并通过FT-IR，热重分析（TGA），差热分析（​​DTA），能量色散X射线能谱（EDX），X射线衍射进行了表征模式（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），原子力显微镜（AFM），布鲁瑙尔·埃米特·泰勒（BET）和电感耦合等离子体（ICP）分析。纳米结构的有机固体催化剂是一种新颖，温和而成熟的催化剂，它通过在无溶剂条件下，二甲酮与各种醛类在80°C下缩合反应，用于级联合成1,8-二氧-八氢氧杂蒽衍生物。 。同样，二氢吡喃[2,3- c在室温下无溶剂条件下，通过醛，丙二腈和3-甲基-1-苯基-2-吡唑啉-5-one的一锅三组分缩合反应合成]吡唑衍生物。据我们所知，这是合成[nano-Fe ₃ O ₄ @SiO ₂ @（CH ₂）_3-咪唑-SO ₃ H] Cl作为有价值的多相纳米磁性固体酸的主要研究。催化的有机反应。