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Dendronized Anionic Gold Nanoparticles: Synthesis, Characterization, and Antiviral Activity
Cornelia E Peña-González1, Pilar García-Broncano2,3,4,5, M Francesca Ottaviani6
1Dpto. de Química Orgánica y Química Inorgánica, Edificio de Farmacia, Universidad de Alcalá, Campus Universitario, Alcalá de Henares (Madrid), Spain.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 16, 2016
Summary
Anionic carbosilane dendrons create water-soluble gold nanoparticles (AuNPs) with reduced toxicity and enhanced HIV-1 inhibition. Direct synthesis yields less toxic AuNPs compared to ligand exchange methods.
Area of Science:
- Nanotechnology and Materials Science
- Biomedical Engineering
- Organic Chemistry
Background:
- Development of water-soluble gold nanoparticles (AuNPs) is crucial for biomedical applications.
- Carbosilane dendrons offer unique functionalization possibilities for nanoparticle synthesis.
- Sulfonate and thiol groups on dendrons can influence nanoparticle properties and interactions.
Purpose of the Study:
- To synthesize water-soluble gold nanoparticles using anionic carbosilane dendrons.
- To characterize the synthesized AuNPs and evaluate their properties.
- To assess the toxicity and biological activity (HIV-1 inhibition) of the dendronized AuNPs.
Main Methods:
- Synthesis of AuNPs via direct reaction and ligand exchange using carbosilane dendrons.
- Characterization using NMR, TEM, TGA, XPS, UV/Vis, elemental analysis, and zeta-potential.
- Investigation of sulfonate group interactions using EPR spectroscopy with copper(II).
Main Results:
- Water-soluble AuNPs were successfully synthesized using carbosilane dendrons.
- AuNPs synthesized by direct reaction exhibited lower toxicity than those from ligand exchange.
- Dendronized AuNPs showed higher inhibition of HIV-1 infection compared to dendrons alone.
Conclusions:
- Anionic carbosilane dendrons are effective in synthesizing water-soluble AuNPs.
- Synthesis method influences AuNP toxicity, with direct reaction being less toxic.
- Dendronized AuNPs demonstrate potential for antiviral applications, specifically against HIV-1.
