Synthesis of gold nanoparticles in hyperbranched polyol dispersions

Abstract

In this study, a series of different generation hyperbranched poly(amine-ester) with hydroxyl as terminal group were synthesized and used as protectants to synthesize gold nanoparticles with a facile and highly reproducible method. The effect of hyperbranched poly (amine-ester) generation on size and their distribution of gold nanopartciels were discussed. The results of ultraviolet visible absorption spectroscopy, Transmission electron microscopy and scanning electron microscopy showed that the mean diameter were 24.3 6 2.6 nm, 18.2 6 2.1 nm, and 13.6 6 1.5 nm corresponding to the different generation hyperbranched poly(amine-ester), and the synthesized gold nanoparticles were almost monodisperse with a narrow size distribution.

Hydrogenation of hydrophobic substrates catalyzed by gold nanoparticles embedded in Tetronic/cyclodextrin-based hydrogels

“…Contrary to procedures described in the literature for which HAuCl4 was used as Au precursor, 20 we used AuCl3 whose fast reduction in an aqueous solution of Tetronics®90R4 (0.17 mmol in 5 mL water) led to AuNP at 40 °C. A small sacrificial quantity of Tetronics® acted as reductive agent thanks to terminal hydroxyl groups of Tetronics® 21 and imparted a pink color characteristic of the presence of AuNP to the solution (Supporting Information, Fig. S1).…”