Electro- and photoactivation of silver–iron oxide particles as magnetically recyclable catalysts for cross-coupling reactions

Abstract

Colloidal Ag particles decorated with Fe3O4 islands can be electrochemically or photochemically activated as inverse catalysts for C(sp2)‒H heteroarylation. The silver–iron oxide (SIO) particles are reduced into redox-active forms by...

A review on sustainable iron oxide nanoparticles: syntheses and applications in organic catalysis and environmental remediation

“…Heterogeneous catalysis mostly deals with various metal nanoparticles, supported catalysts, hybrid catalysts, and metal oxides, [39][40][41] [42][43][44] To date, various magnetic catalysts or magnetic supported catalysts, predominantly based on iron oxides have been employed in numerous organic transformations besides other applications. [45][46][47] In the case of iron oxides, up to now, four distinct crystalline polymorphic forms of ferric oxides namely α-, β-, γ-, and ε-Fe 2 O 3 have been thoroughly characterized and their applications described. 23 Because of their unique structural arrangements, each of the nanoscale polymorphic variants of Fe 2 O 3 exhibits distinctive magnetic, biochemical, and catalytic features; [48][49][50][51][52] α-Fe 2 O 3 and related hybrid nanomaterials have been examined as heterogeneous catalysts.…”

“…42–44 To date, various magnetic catalysts or magnetic supported catalysts, predominantly based on iron oxides have been employed in numerous organic transformations besides other applications. 45–47…”