Magnetic inorganic–organic hybrid nanomaterial for the catalytic preparation of bis(indolyl)arylmethanes under solvent-free conditions: Preparation and characterization of H5PW10V2O40/pyridino-Fe3O4 nanoparticles.

Highlights: [•] Preparation of a new magnetic inorganic–organic nanohybrid material. [•] Introducing a new and efficient protocol for the synthesis of substituted bis(indolyl)phenylmethanes. [•] Using a highly reusable nanocatalyst without significant loss of catalytic activity. [•] The heteropolyacid catalyst was covalently linked to the modified magnetite. [ABSTRACT FROM AUTHOR]