Fe3O4@SiO2 nanoparticle-immobilized Cu(II)-benzoylthiourea complex as a magnetically reusable catalyst for the synthesis of benzo[d]imidazo[2,1-b]thiazole-1-ium hydroxide derivatives in water

摘要

In this work, an appropriate method for the synthesis of benzo[d]imidazo[2,1-b]thiazole-1-ium hydroxide derivatives has been developed using a benzoylthiourea Cu(Iota Iota) complex immobilized on silica-coated Fe3O4 nanoparticles (Fe3O4@SiO2-BTU-Cu(II)) as a highly stable, heterogeneous and magnetically recoverable nanocatalyst. The constructed superparamagnetic nanocatalyst was characterized by VSM, ICP, FT-IR, TGA, SEM-EDX, TEM and XRD analyses. The nanocatalyst was easily recoverable through an external magnet and reused at least 6 times regardless of any considerable loss of its catalytic activity.