In this work, an oxovanadium(IV) complex supported on the surface of modified Fe₃O₄ with a silica shell has been synthesized. The obtained nanostructures were characterized using FT-IR, XRD, SEM, EDX, VSM, TGA and ICP-AES analyses. The synthesized magnetic nanocatalyst has been applied as an efficient catalyst for the synthesis of 2-amino-4H-benzo[h]chromenes via three-component one-pot reaction and also selective oxidation of sulfides to sulfoxides under solvent-free conditions. The synthesized nanocatalyst could be easily separated from the reaction mixture using an external magnet and reused several consecutive runs for both reactions without noticeable reducing in its catalytic activity.

在该工作中，已经合成了负载在具有二氧化硅壳的改性的Fe ₃ O ₄的表面上的氧钒（IV）络合物。使用FT-IR，XRD，SEM，EDX，VSM，TGA和ICP-AES分析表征获得的纳米结构。合成的磁性纳米催化剂已被用作通过三组分一锅法反应合成2-氨基-4 H-苯并[ h ]色烯的有效催化剂，并且还在无溶剂条件下将硫化物选择性氧化为亚砜。合成的纳米催化剂可以使用外部磁体轻松地从反应混合物中分离出来，并在两个反应中连续使用几次，而其催化活性没有明显降低。