OICC Press Iranian Journal of Catalysis 2345-4865 12 2 2022 03 15 Nano-[SiO2@R-Im-SO3H][CF3COO]: an effectual catalyst for the production of bis-coumarins and N,N′-alkylidene bisamides 10.30495/ijc.2022.689835 EN Jaleh Atashrooz Department of Chemistry, Payame Noor University, PO Box 19395-3697, Tehran, Iran Abdolkarim Zare Department of Chemistry, Payame Noor University, PO Box 19395-3697, Tehran, Iran 0000-0002-8210-3155 Journal Article 2022 03 15 A novel organic-inorganic hybrid nanomaterial namely nano-[SiO2@R-Im-SO3H][CF3COO] (NSRISC) was synthesized, and characterized using FT-IR, EDS, FE-SEM, TGA and XRD analyses. Thereafter, the solvent-free production of bis-coumarins (from aryl aldehydes and 4-hydroxycoumarin) and N,N′-alkylidene bisamides (from aryl aldehydes and benzamide) was catalyzed by NSRISC. Bis-coumarins were produced in 86-97% at 100 ºC, and bisamides were obtained in 87-97% at 105 ºC. The reaction times were 15-30 min for both kinds of compounds.