Azizi Sajjad, Shadjou Nasrin
Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Nanotechnology, Faculty of Science and Chemistry, Urmia University, Urmia, Iran.
Heliyon. 2021 Jan 28;7(1):e05915. doi: 10.1016/j.heliyon.2021.e05915. eCollection 2021 Jan.
Wrinkled fibrous nanosilica (WFNS) which functionalized by ionic liquid modified FeO NPs and CuI salts has been synthesized and characterized with FE-SEM, TEM, FT-IR, FAAS, EDX, and, XRD, VSM, and BET-BJH analysis. This new and effective magnetic ceramic nanocatalyst has been applied towards rapid synthesis of -sulfonylamidines using reaction of phenyl acetylene, substituted sulfonyl azide and various amines under solvent-free conditions in very short reaction time. Higher catalytic activity CuI/FeONPs@IL-DFNS in the reaction is because of special structure of DFNS and existence of ionic liquids on its pores which act as a robust anchors to the loaded various nano-particles. So, this lead to no leaching of them from the pore of the composite. Shorter reaction time, higher yield, recovery of the catalyst using an external magnet and its reusability for 8 series without noteworthy reduction in its activity are the advantages of newly synthetic catalyst toward efficient synthesis of -sulfonylamidines.
通过离子液体修饰的FeO纳米颗粒和CuI盐功能化的皱纹纤维状纳米二氧化硅（WFNS）已被合成，并通过场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FT-IR）、火焰原子吸收光谱法（FAAS）、能量散射X射线光谱（EDX）以及X射线衍射（XRD）、振动样品磁强计（VSM）和BET-BJH分析进行了表征。这种新型高效的磁性陶瓷纳米催化剂已被用于在无溶剂条件下，通过苯乙炔、取代磺酰叠氮和各种胺的反应，在非常短的反应时间内快速合成β-磺酰脒。反应中催化活性较高的CuI/FeONPs@IL-DFNS是由于DFNS的特殊结构以及其孔上存在离子液体，这些离子液体作为负载的各种纳米颗粒的牢固锚定物。因此，这导致它们不会从复合材料的孔中浸出。较短的反应时间、较高的产率、使用外部磁铁回收催化剂以及其在8个循环中可重复使用且活性无明显降低，是这种新合成的催化剂在高效合成β-磺酰脒方面的优势。
