[R1R3IM]+[BF4]-离子液体中链状纳米金的制备

Preparation of Gold Nanochains in 1-Butyl-3-Methylimidazolium Tetrafluoroborate Ionic Liquids

摘要:

以N-甲基咪唑和溴代正丁烷为起始原料，采用两步法合成了1-丁基-3-甲基咪唑四氟硼酸盐离子液体，并对所合成的离子液体做了红外光谱表征。在1-丁基-3-甲基咪唑四氟硼酸盐离子液体中，利用硼氢化钠还原氯金酸，制备了纳米金。紫外-可见光谱和透射电镜(TEM)试验结果表明，所制备的纳米金以链状为主。离子液体在纳米金制备过程中不仅起到了溶剂作用，还起到了修饰剂的作用。

Abstract:

1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([BMIM]+[BF4]-) was synthesized using N-methylimidazole and 1-bromobutane as starting materials by two-step method. The obtained ionic liquid was characterized by IR spectra. Gold nanochains were prepared through the reduction of HAuCl4 by NaBH4 in [BMIM]+[BF4]-. UV-Vis spectra and TEM images reveal that the prepared nano gold is mainly chain-like. The ionic liquid not only acts as reaction medium but also as modifier in the preparation of nano gold.