Water-Soluble Starlike Poly(acrylic acid) Graft Polymer: Preparation and Application as Templates for Silver Nanoclusters
作者：Huiqiang Li, Zhanxian Li, Linzhi Wu, Fang Liu, Jie Zhou, Miao Luan, Mingming Yu*, Liuhe Wei*
關鍵字：Nanoclusters, Silver, Poly(acrylic acid), Graft Polymer
論文來源：期刊
具體來源：polymer bulletin
發表時間：2011年
Water-soluble starlike polymers containing concentrated carboxyl groups were conveniently synthesized via the combination of “click” chemistry and atom transfer radical polymerization (ATRP). The starlike polymer was composed of a shorter polyacrylate main chain and longer poly(acrylic acid) side chains. Alkyne and azide groups were introduced to the structure units of the main chain by esterification and the chain end of the side chain by substitution reaction of NaN3 to bromine, respectively. By click chemistry between alkyne and azide group, well-defined starlike polymers were obtained. FT-IR, gel permeation chromatography (GPC) and 1H NMR were used to characterize the resulting polymers. Aggregation behavior demonstrated by transmission electron microscopy (TEM) was observed when the starlike polymers were dispersed in water at pH 7.0-7.5. Using the starlike polymers as templates, water-soluble silver nanoclusters mainly consisting of Ag2 supported by the generated nanoparticles and carboxyl groups were successfully synthesized. Also, their optical properties and morphology were characterized by UV-vis absorption spectra and TEM.