近年来,室温离子液体（Room Temperature Ionic Liquids）作为一种新颖的催化剂和绿色溶剂正在被越来越多的人们所认识和接受,在有机合成、催化和萃取分离等领域得到了广泛的应用。而功能化离子液体研究的深入开展不仅大大地丰富了离子液体家族的多样性，而且赋予了离子液体特殊的物理、化学性能，也极大地拓展了离子液体的应用领域，关于功能化离子液体的研究．将是未来离子液体研究领域的一个主要方向。
Ag nanoparticles were prepared using hydroxyl-functionalized ionic liquids as reductant and reaction medium. Nanoparticles with different particle sizes were obtained by using ionic liquids with different structures, while nanorods were harvested when the reaction temperature was increased. The materials obtained were investigated by XRD and TEM. The results indicate that the crystal is in face-centred cubic structure for both of Ag nanoparticles and nanorods, and the diameter of Ag nanoparticles prepared in 1-ethoxyl-3-methyl imidazolium tetrafluoroborate ([C2OHmim]BF4), 1-(4′-hydroxyl)butyl-3-methyl imidazolium tetrafluoroborate ([C4OHmim]BF4) and 1-(6′-hydroxyl)hexyl-3-methyl imidazolium tetrafluoroborate ([C6OHmim]BF4) ionic liquid is about 25, 15 and 10 nm, respectively. And the diameter of Ag nanorods is about 200 nm and 2 μm in length. Finally, the formation mechanism of Ag nanoparticles and nanorods is proposed.
Organic-dispersible lanthanide fluorides nanocrystals were synthesized at a large scale using colloid-extraction method, in the presence of dialkyl-dithiophosphinic acid (DDPA) as the extraction agent. The products were characterized by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and Fourier transformation infrared (FTIR) spectroscopy. It was found that the synthesized lanthanide fluorides nanoparticles had high purity and crystallinity, and could be well dispersed in organic solvents such as chloroform, toluene etc., which could be closely related to the surface-capping of the nanocrystals by the DDPA molecules. Moreover, the nanocrystals before and after extraction by DDPA showed few differences in the microscopic morphologies. It was implied that DDPA as the extraction agent had good protection to the nanocrystals as well, which could be essential to the commercial application of the titled rare earth nanocrystals as novel multifunctional additives in the fields of lubrication.
