A one-pot radiation-chemical synthesis of metal-polymeric nanohybrides in solutions of vinyltriazole containing gold ions

Surface coverage and adsorption properties of 1-vinyl-1,2,4-triazole on Au(111) surface: a molecular dynamics study

CONTEXT

The adsorption of 1-vinyl-1,2,4-triazole monomers on Au(111) surface was investigated via molecular dynamics method. Our results indicate that the surface coverage varied depending on the concentration of the monomers. Specifically, as the concentration of the monomers increased, the surface coverage also increased. At the highest concentrations, we observed up to 73% coverage of the metal surface. We show that the 1-vinyl-1,2,4-triazole monomers display a strong adsorption on gold surface, and the monomer binds to metal surface via heterocyclic pyridine-like nitrogen, and the distance between near nitrogen to gold is estimated to be 0.25 nm. Note that upon the concentration increase, we track the different layers of adsorption.

METHOD

The 1-vinyl-1,2,4-triazole (VT) molecule was created using online resources of MOLVIEW. The Au {111} facet was taken from our previous simulation, and as a force field, the CHARMM-GOIP concept was used. As a water model, the SPC approach was used. The latest version of GROMACS with GPU support was used. The snapshots were generated with the VMD package.

Synthesis, Properties, and Biological Activity of Poly(1-vinyl-1,2,4-triazole) and Silver Nanocomposites Based on It

The review summarizes the data on the synthesis, physicochemical properties, and biological activity of poly(1-vinyl-1,2,4-triazole) and its nanocomposites with silver nanoparticles. The results of studying the antibacterial and antitumor activity of the polymers and nanocomposites and their immunomodulatory ability, toxicity, and interaction with body cells, as well as the prospects for their use in the development of medical materials, are presented.

One-Pot Preparation of Metal-Polymer Nanocomposites in Irradiated Aqueous Solutions of 1-Vinyl-1,2,4-triazole and Silver Ions

Metal-polymer nanocomposite polyvinyltriazole-silver nanoparticles were obtained using one-pot synthesis in irradiated aqueous solutions of 1-vinyl-1,2,4-triazole (VT) and silver ions. Gel permeation chromatography data show that upon radiation initiation, the molecular weight of poly(1-vinyl-1,2,4-triazole) increases with increasing monomer concentration. To study the kinetics of polymerization and the features of the radiation-chemical formation of nanoparticles, UV-Vis spectroscopy was used. TEM images show a relatively small average size of the forming nanoparticles (2-3 nm) and a narrow size distribution, which shows the effective stabilization of nanoparticles by triazole substituents at a molar ratio of VT and silver ions of 25/1. The addition of ethyl alcohol was used to increase the efficiency of synthesis and suppress the crosslinking of macromolecules in solution. The results of the work show that aqueous-alcoholic solutions of 1 wt.% VT can be used to obtain soluble nanocomposite materials. 10 wt.% monomer solutions have prospects for use in the preparation of polymer gels filled with nanoparticles.