Silver and copper nanoparticles stabilized on ionic liquids-functionalized polyhedral oligomeric silsesquioxane (POSS): Highly active and recyclable hybrid catalysts

Two novel heterogeneous hybrid catalysts were successfully synthesized using octa-aminopropyl poly-
hedral oligomeric silsesquioxane hydrochloride salt (OA-POSS) and ionic liquids, followed by immobiliza-
tion of Cu and Ag nanoparticles. The obtained hybrid catalysts, Cu@POSS-ILs and Ag@POSS-ILs, were
characterized using FT-IR, SEM, EDX, TEM, XRD and TGA. Catalytic studies demonstrated that
Cu@POSS-ILs was an excellent catalyst for click reaction in aqueous medium. Furthermore, Ag@POSS-
ILs was also exhibited to be an active catalyst for 4-nitrophenol (4-NP) reduction. Simple preparation
and easy catalysts recovery and recyclability of Cu@POSS-ILs and Ag@POSS-ILs for at least 3 and 6 runs,
respectively, without loss of catalytic activity could be considered as important advantageous from cat-
alytic application point of view.