A Nanostructured Organic‐Inorganic Hybrid Material: Preparation, Characterization and Catalytic Performance for the Synthesis of N,N′‐Alkylidene Bisamides

Abstract

AbstractIn this research, a novel nanostructured mesoporous organic‐inorganic hybrid material, based on dicationic ionic liquid‐anchored with silica, namely nano‐2‐[N′,N′‐dimethyl‐N′‐(silica‐n‐propyl)ethanaminium chloride]‐N,N‐dimethylaminium bisulfate {nano‐[DSPECDA][HSO4]} has been prepared, and characterized by FT‐IR, energy‐dispersive X‐ray spectroscopy (EDX), field emission scanning electron microscopy (FE‐SEM), X‐ray diffraction (XRD), thermal gravimetry (TG), differential thermal gravimetric (DTG), differential thermal analysis (DTA), and adsorption/desorption porosimetry (BET, Langmuir, adsorption/desorption isotherm, BJH, and t‐plot) methods. Thereafter, the nanomaterial has been utilized as a highly effectual, heterogeneous and recyclable nanocatalyst for the synthesis of N,N′‐alkylidene bisamides via the condensation reaction of arylaldehydes (1 eq.) with primary amides (2 eq.) under solvent‐free conditions. The reaction results were better compared with the literature in terms of two or more of these factors: turnover frequency (TOF), yield, temperature, time, and the reaction media. Moreover, a plausible mechanism for the synthesis has been proposed.