Abstract The synthesis and catalytic application of a novel magnetic silica-nanomaterial-supported ionic liquid/hexamolybdate (Fe3O4@SiO2-IL/[Mo6O19]) are reported. The Fe3O4@SiO2-IL/[Mo6O19] nanocatalyst was prepared through modification of magnetic Fe3O4@SiO2 nanoparticles with alkyl-imidazolium ionic liquids followed by treatment with hexamolybdate anions. The Fe3O4@SiO2-IL/[Mo6O19] was characterized using FTIR, EDX, TGA, SEM, TEM, PXRD, and VSM techniques. This nanocatalyst exhibited excellent activity in the one-pot synthesis of biologically active dihydropyrimidinones through the Biginelli reaction. Furthermore, this magnetically recoverable nanocatalyst could be reused at least seven times without a significant loss of efficiency.

中文翻译：

---

核壳结构的 Fe3O4@SiO2 负载的 IL/[Mo6O19]：一种用于制备生物活性二氢嘧啶酮的新型磁性可回收纳米催化剂

摘要 报道了一种新型磁性二氧化硅-纳米材料负载的离子液体/六钼酸盐（Fe3O4@SiO2-IL/[Mo6O19]）的合成和催化应用。Fe3O4@SiO2-IL/[Mo6O19]纳米催化剂是通过用烷基咪唑鎓离子液体修饰磁性Fe3O4@SiO2纳米颗粒，然后用六钼酸阴离子处理来制备的。Fe3O4@SiO2-IL/[Mo6O19] 使用 FTIR、EDX、TGA、SEM、TEM、PXRD 和 VSM 技术进行表征。这种纳米催化剂在通过 Biginelli 反应一锅法合成具有生物活性的二氢嘧啶酮方面表现出优异的活性。此外，这种磁性可回收纳米催化剂可以重复使用至少七次，而不会显着降低效率。