Supramolecular grafting and stabilization of manganese complex on kryptofix23 modified Fe3O4@carbon nanosphere: as highly efficient, reusable, and clean nanocatalyst for xanthene’s unusual coupling

Abstract Grafting and stabilization of metal complexes for increasing catalytic activity have remained an enormous challenge in the catalytic arena. However, designing a catalytic system with complementary properties including high surface area, high loading, and easy separation offers a promising route for efficient utilization of magnetic material for various applications. Herein, novel core-shell nanosphere catalyst (Fe₃O₄@C/KP23@MnCl₂) was successfully synthesized with a magnetite core encapsulated in a carbon shell. It was modified using CPTES (3-chloropropyltriethoxysilane) and Kryptofix23 (KP23) ligand in the carbon surface for conversion to Fe₃O₄@C/KP23 support. The Manganese complex was coordinated onto the KP23 ligand decorated Fe₃O₄@C to improve the unusual coupling xanthenes in ethanol. It was found proposed nanocatalyst is greener, recyclable, and more suitable option for the large-scale application and provide some new insights into organic transformation.