Alkyl surface modification of nanoporous silica SBA-15 by click chemistry to obtain triazole products
Subject Areas : International Journal of Bio-Inorganic Hybrid Nanomaterials
Keywords: Mesoporous silica, Click reaction, Functionalized SBA-15, Huisgen 1, 3-dipolar cycloaddition, Propargyl bromide,
Abstract :
In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalizedwith aminopropyl groups that were converted to propargyl-bearing moieties through the reaction withpropargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reactionwith sodium azide in order to obtain the corresponding triazole products. The covalent modification ofmesoporous silica surface with organic functional groups was confirmed by different characterizationtechniques including Fourier transform infrared spectroscopy, thermogravimetric analysis, Scanningelectron microscopy, Transmission electron microscopy, N2 adsorption-desorption isotherms and Ramanspectroscopy. The results have confirmed that SBA-15 was successfully functionalized with organicmoieties. No change in the periodic structure of the SBA-15 silica support was observed throughout thegrafting procedure. Surface area, pore size and pore volume decreased by attaching functional groupsto the pore surface. This approach provides a simple and convenient route to efficiently functionalize awide range of new structures on the surface of SBA-15.