Capture of borane in aqueous media: Role of the metal ion in the formation of aromatic 2-amino-N-heterocycle borane complexes

Efficient loading of silver nanoparticles on graphene oxide and its antibacterial properties

“…The [Ag(NH 3 ) 2 ] + might intercalate into the graphene layers and be absorbed on the nanosheets tightly, and silver iodide precipitation was hardly observed in a few minutes after adding iodide ions on the condition that the initial weight ratio of AgNO 3 to GO was no more than 2:1 (figure S1 is available online at stacks.iop.org/ NANOX/1/010041/mmedia). The main forces between [Ag(NH 3 ) 2 ] + and GO may be π type silver ionaromatic [24][25][26], and silver ion-oxygen [27] interaction, since part of the π electrons in polyaromatic structure and hydroxyl enter into the empty electron orbits of the silver ions. In addition, electrostatic interaction between carboxyl anion of GO and the [Ag(NH 3 ) 2 ] + may be another force to absorb the [Ag(NH 3 ) 2 ] + on the edges of the GO sheets.…”

“…GO contains polyaromatic structure and a variety of oxygen functional groups as hydroxyl, carbonyl, and carboxyl in alkaline condition. The carboxyl anion may not only absorb silver ions by electrostatic interaction, but also make the GO sheets further apart by charge repulsion, which allows the silver ions to enter and attach to the nanosheets of GO by π-type silver ion-aromatic [24][25][26], silver ion-oxygen [27] interaction. Thus GO might be an excellent dispersant for silver ions.…”