用离子液体聚合物制备和稳定金纳米粒子

Preparation and Stabilization of Gold Nanoparticles by Polymeric Ionic Liquids

以1-甲基咪唑和4-乙烯基苄氯制备了聚〔1-甲基-3-(4-乙烯基苯甲基)咪唑氯〕(PMVBIC),并用1HNMR和FTIR进行了结构表征。然后在PMVBIC的水溶液中,用NaBH4还原HAuCl4制备金纳米粒子,通过UV-Vis光谱和TEM分析发现,PMVBIC能有效稳定金纳米粒子,而且PMVBIC和NaBH4的浓度会明显影响金纳米粒子的粒径、形状和分散性,当m(PMVBIC)∶m(HAuCl4)=34.5∶1,n(NaBH4)∶n(HAuCl4)=2∶1时,可以制得粒径约7nm、均匀分散的球形金纳米粒子,室温存放150 d无明显变化。

Poly [ 1-methyl-3-（4-vinylbenzyl ） imidazolium chloride] （PMVBIC） was synthesized by reaction of 1-methylimidazole and 4-vinylbenzyl chloride. Stucture of the product was characterized by ^1HNMR and FTIR. Then gold nanopaticles （GNPs） were prepared in aqueous solution of PMVBIC from HAuCl4 and NaBH4. UV - vis spectroscopy and TEM indicated that GNPs could be stabilized by PMVBIC effectively. The size, shape and dispersity of GNPs were markedly affected by the concentration of PMVBIC and NaBH4. The well dispersed spherical GNPs about 7 nm in diameter could be gotten when m（ PMVBIC ） ： m （ HAuC14 ） = 34. 5 ： 1 and n （ NaBH4 ） ： n （ HAuC14 ） = 2：1. It can be stored more than 150 d without obvious change.