OICC Press Iranian Journal of Catalysis 2345-4865 7 2 2024 02 03 Preparation and characterization of ionic liquid functionalized SBA-15 and its application in the synthesis of 2,3-dihydroquinazolinones EN Zohreh Kheilkordi Department of Chemistry, Alzahra University, Vanak Square, P.O. Box 1993893973, Tehran, Iran. Leila Seiedakbari Department of Chemistry, Alzahra University, Vanak Square, Tehran, Iran, P.O. Box 1993893973. Parisa Gholamzadeh Department of Chemistry, Alzahra University, Vanak Square, Tehran, Iran, P.O. Box 1993893973. Alireza Badiei School of Chemistry, College of Science, University of Tehran, Tehran, Iran. 0000-0002-6985-7497 Journal Article 2024 02 03 N-Methyl-Nʹ-propyltrimethoxysillylimidazolium chloride was prepared as ionic liquid (IL) containing silylating agent and then used for modification of the internal surface of SBA-15 to gain a heterogeneous ionic liquid catalyst. Subsequently, the obtained SBA-IL was characterized using various techniques, including SEM and TEM images, FT-IR, X-ray diffraction, TGA/DTA and BET analyses. It was found that the uniform SBA-15 particles, with a dimension of 400-800 nm, showed the decreasing in the pore volume, surface area, and pore diameter after modification process which is as a results of incorporating imidazole groups onto the pores of SBA-15. Afterward, catalytic activity of SBA-IL was investigated in the synthesis of 2,3-dihydroquinazolinones under solvent free condition.