Stabilization of colloidal metallic nanoparticles using polymers and hexa-substituted compounds with 1,3,4-oxadiazole pendant groups

CALDERA VILLALOBOS, MARTIN; GARCIA SERRANO, JESÚS; HERRERA-GONZALEZ, A. M.; MARTINS ALHO, MIRIAM

COLLOID AND POLYMER SCIENCE

SPRINGER

Lugar: Berlin; Año: 2019 vol. 297 p. 1 - 14

0303-402X

Stabilization of metallic nanoparticles in colloidal solutions have been realized by different cappingagents. Heterocyclic compounds can interact with metallic surfaces and some authors have reported the using ofheterocyclic compounds for the stabilization of colloidal nanoparticles. In this work, we report stabilization ofAu and Ag nanoparticles using polymers and hexa-substituted compounds with 1,3,4-oxadiazole pendantgroups. Using a polyelectrolyte with 2-amino-1,3,4-oxadiazole groups was possible to reduce Au3+ and Ag+ ionsand stabilize Au and Ag nanoparticles in colloidal solution. With polymers and hexa-substituted compoundscontaining 1,3,4-oxadiazoles substituted with methyl, phenyl or acetyl groups were possible to stabilize Au andAg nanoparticles in a water-DMF medium. Characterization by TEM revealed the obtaining of Au and Agnanoparticles with control over the size and the shape. The lowest average size for Au and Ag nanoparticles was4 and 10 nm respectively, using the hexa-substituted compound with 2-acetamido-4-acetyl-1H-1,3,4-oxadiazolegroups