1-The conditions of the relationship between the pigment (Pyocyanin) with Gold (Au Nanoparticles)?
2-Dose the pigment (Pyocyanin) work as Reducing agent or not?
3-Dose the pigment (Pyocyanin) endures high temperatures or not?
Ali Safaa
1.Pyocyanin can be adsorbed on the surface of gold nanoparticles. It does not oxidize or reduce gold. Gold is oxidized with potassium cyanide or aqua regia.
2. When interacting with gold ions, Pyocyanin (quinone) acts as an oxidizing agent.
3. Pyocyanin melting point 133 0С.
Pyocyanin is a blue pigment produced by the bacterium Pseudomonas aeruginosa. It has been shown to act as a reducing agent for the synthesis of gold nanoparticles under certain conditions.
Gold nanoparticles are typically synthesized by reducing a gold salt with a reducing agent such as sodium borohydride or citrate. Pyocyanin can also act as a reducing agent for gold salts, such as HAuCl4, leading to the formation of gold nanoparticles.
The reduction of gold salts by pyocyanin is a complex process and requires specific conditions to occur. The reduction is favored by the presence of oxygen, which is required for the oxidation of the pyocyanin molecule to occur. The reaction also requires an alkaline pH, typically between 8 and 10.
Additionally, the synthesis of gold nanoparticles by pyocyanin is influenced by several factors, such as the concentration of pyocyanin, the concentration of the gold salt, and the reaction temperature.
Overall, the reduction of gold salts by pyocyanin to form gold nanoparticles is a promising area of research, but more studies are needed to fully understand the mechanism and optimize the synthesis conditions.
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