Two novel triazole-modified silica supports A and B were successfully prepared via "click" reaction of azide-functionalized SiO2 with propargyl alcohol (A) and propargyl amine (B), in which the click-triazole as an important functional entity, in addition to a molecular linker, provides capabilities of metal coordination as an excellent chelator. Treatment of the resulting click-supports with Pd(OAc)(2) afforded the click-catalysts A and B, which were well characterized and evaluated in Suzuki-Miyaura coupling in terms of activity and recyclability in H2O/EtOH solvent. The catalyst A showed more reasonable results and so, was applied as a highly efficient and recyclable catalyst in the coupling reactions of various aryl halides with phenylboronic acid under phosphine-free and low Pd loading conditions. Two novel nano pd-catalysts were successfully prepared by immobilization of Pd(OAc)(2) onto the silica supports containing the nitrogen-rich triazole chelators and were investigated in Suzuki-Miyaura coupling in aqueous solvent. [GRAPHICS] .