Synthesis of noble metal nanoparticles (NPs) on modified graphene oxide with biocompatible
polymers has attracted significant due to their unique properties and various applications.
In this research, covalent-modified graphene oxide (MGO) with diacid terminated poly
(ethylene glycol) (PEG) was used as a substrate and stabilizing of Au (III). The reduction
of MGO-Au (III) complex with hydrazine monohydrate under reflux condition obtained
biocompatible reduced MGO (rMGO)-Au NPs. Diacid terminated PEG obtained from the reaction
of PEG with succinic anhydride in the presence of N,N- dicyclohexylcarbodiimide (DCC)
and 4-methylamino pyridine (DMAP) was attached to GO sheets to prevent from the aggregation
of rMGO sheets and Au NPs. The resulting aqueous suspension was characterized through
UV vis, FT-IR, Raman, XRD, DLS-zeta potential, SEM, EDX and TEM. Furthermore, nanocomposite
showed good catalytic behavior in Betti reaction- synthesis of 1-(alpha-aminoalkyl)-2-naphthols.
The favorable properties of colloidal nanocomposite were attributed to the stable
and well distribution Au NPs on rMGO.