Phosphonium and Ammonium Ionic Liquids with Aromatic Anions: Synthesis, Properties, and Platinum Extraction
摘要:
以三(丙烯酰甲基)氯化铵(Aliquat 336)和三己基(十四烷基)氯化磷(Cyphos IL101)为前体,采用偏合成路线制备了几种具有官能化芳香阴离子的疏水性长链季铵和鏻离子液体(IL)。加入具有羟基、甲氧基、硫醇和硫醚官能团的芳香族阴离子以及四苯基硼酸阴离子后,IL 的化学稳定性得到了提高,其物理化学性质也发生了改变。此外,芳香族阴离子会明显降低铵基和鏻基 IL 的水溶性和吸水性。利用液相微萃取技术,硫醇基和硫醚基 ILs 被用于从水相萃取铂。与时间相关的研究表明,30 分钟后,铂的去除率可达 95%。阴离子在水介质中的浸出率为 0.01 wt-%,因此发现所评估的 ILs 适合用作从水溶液中萃取铂的萃取剂。
Synthesis, characterization and thermal properties of thiosalicylate ionic liquids
作者:CECILIA DEVI WILFRED、FADWA BABIKER MUSTAFA
DOI:10.1007/s12039-013-0516-5
日期:2013.11
In an attempt to produce new functionalized ionic liquids, a series of thiosalicylate ionic liquids based on imidazolium, ammonium, phosphonium, choline and pyrrolidinium cations were synthesized. The compounds were characterized by Infra Red (IR), Nuclear Magnetic Resonance (NMR) and mass spectra (ESI-MS). Their glass-transition temperatures, melting points and decomposition temperatures have been measured. Physicochemical properties of ionic liquids are influenced by alkyl chain length and nature of the cation of ionic liquids.