prso3h containing il-based nanoporous organosilica as an efficient and highly stable nanocatalyst

Recently, porous nanomaterials (pnms) have attracted a lot of attention by researchers owing to they are used in a wide range of applications including catalysis, chemical separations, and tissue engineering [1]. based on their pore size, pnms can be classified into three groups of microporous, mesoporous and macroporous which mesoporous materials are the most important category due to their high surface area and appropriate pore size for entering and exiting various organic and inorganic materials [2]. among the different kinds of mesoporous materials, periodic mesoporous organosilica (pmos) have attracted more attention because of their high thermal and mechanical stability and also the uniform distribution of organic functional groups in their frameworks [3]. accordingly, herein, a sulfonic acid containing ionic liquid-based nms which denoted as pmo@il/so3h is prepared and characterized by using ir and sem analyses. this pmo@il/so3h has been applied as an effective and highly stable nanocatalyst in the hantzsch reaction and delivered corresponding dihydropyridine derivatives in high yield at selectivity (see fig. 1).