sba-15-supported copper (ii) complex: an efficient heterogeneous catalyst for azide-alkyne cycloaddition in water

He reaction of the functionalized mesoporous sba-15 in absolute ethanol with copper(ii) acetate afforded a novel cuii-schiff base/sba-15 catalyst. the compound cuii-schiff base/sba-15 was characterized by ir spectroscopy, smallangle xray diffraction (sax), energy dispersive x-ray analysis (edxs), xray absorption near edge structure (xanes), scanning electron microscope (sem), transmission electron microscope (tem) and n2 adsorption/desorption studies. further, we tested the catalytic activity of this welldefined material in threecomponent coppercatalyzed azidealkyne cycloaddition (cuaac) reactions to obtain 1,4-disubstituted-1,2,3-triazoles in good to excellent yields from an organic halide, sodium azide and alkyne in water as a green solvent. more importantly, the catalyst can be recovered and reused efficiently up to five consecutive cycles with negligible loss of catalytic activity.