A PROCESS FOR MAKING SELF ASSEMBLED SILOXANE-POLYINDOLE-GOLD NANOPARTICLE NANOCOMPOSITE

摘要

TITLE: A PROCESS FOR MAKING SELF ASSEMBLED SILOXANE-POLYINDOLE-GOLD NANOPARTICLE NANOCOMPOSITE The present invention relates to a method for preparing noble metal nanoparticles and polymer nanocomposite through the active participation of amine functionalized alkoxysilanes in voltatile organic solvent acetone or the like. The invention report that 3-aminopropyltrimethoxysilane may be converted into siloxane polymer in the presence of acetone while incubating the same in volatile organic solvent acetone or the like and simultaneously acetone form imine linkage with amine functionality of alkoxysilanes. The presence of imine linkage in siloxane matrix induce the conversion of gold cations into gold nanoparticles. Accordingly the imine mediated synthesis of gold nanoparticles may be made either incubating gold cations during the formation of imine linkage (simultaneous synthesis) or the same may be allowed to form after the synthesis of siloxane polymer enriched with imine functionality (sequential). It is also to be noted that as formed siloxane polymer may be casted into membrane over solid surface and the thin film siloxane membrane on solid surface may also enable the conversion of gold cations into gold nanoparticles in solid state. Further indole monomer present in acetone also allow the conversion of gold cation into gold nanoparticles followed by the formation of polyindole while incubating the mixture of indole solution and gold cation solution made in acetone thereby forming polyindole-gold nanoparticles. The suspension of polyindole-gold nanoparticles and siloxane-gold nanoparticles undergo self assembling and enable the formation of self assembled polyindole-siloxane-gold nanoparticles nanocomposite in volatile sovent like acetone having great potentiality in membrane formation under ambient condition just by evaporation of volatile solvent.