Synthesis And Characterization Of Polymer Ligand For Gold Nanoparticles

In recent years, the development and application of nanomaterials have blazed a trail for the new materials. Inorganic metal nanoparticles, as a major field of nanomaterial research, have shown significant potential applications for its distinctive physical and chemical properties.For metal nanoparticles, it is necessary to carry out surface modification and assembly of the nanoparticles. In this thesis, we selected the gold nanoparticles as the research object, synthesised polymer ligands with stimuli-responsive host-guest interaction to guide the assembly of gold nanoparticles, and self-crosslinking of ligands on gold nanoparticle surface in order to improve the stability of gold nanoparticles. Specifically, the following works have been carried out:(1) Synthesis and characterization of functional polymer ligands. We have designed and synthesized electrolyte and non-electrolyte polymer ligand, and functionalized two types of polymers with host-guest recognition properties. This part of work aims for further initiation and adjustment of gold nanoparticle assembly.(2) Synthesis and self-crosslinking of gemini ligands. We designed and synthesized a gemini quaternary ammonium ligand as the stabilizer for gold nanoparticles. The experimental results confirmed the stronger adsorption ability of gemini ligands to gold nanoparticles. Self-crosslinking of gemini ligands on gold nanoparticle surface results in higher degree of polymerization and crosslinking, which provides higher stability for gold nanoparticles.