For the first time, a new acidic imidazolium-based ionic liquid supported on magnetic nanoparticles (MNP@PEG-ImHSO₄) was synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDAX), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) techniques. Afterwards, its catalytic activity was investigated in the Friedländer synthesis of quinolines through a condensation reaction between 2-aminoaryl ketones and α-methylene ketones under solvent-free conditions. The catalyst could readily be separated from the reaction mixture using an external magnet and could be reused in subsequent reactions with no significant loss of activity.

首次合成了负载在磁性纳米粒子上的新型酸性咪唑基离子液体（MNP @ PEG-ImHSO ₄），并通过傅里叶变换红外光谱（FT-IR），场发射扫描电子显微镜（FESEM）进行了表征，透射电子显微镜（TEM），能量色散X射线（EDAX），热重分析（TGA）和X射线衍射（XRD）技术。之后，在无溶剂条件下，通过2-氨基芳基酮与α-亚甲基酮的缩合反应，在喹啉的Friedländer合成中研究了其催化活性。使用外部磁体可以容易地将催化剂从反应混合物中分离出来，并且可以在随后的反应中重新使用，而活性没有明显损失。