作者:Alexander Rupp、Nataliya Roznyatovskaya、Harald Scherer、Witali Beichel、Petra Klose、Carola Sturm、Anke Hoffmann、Jens Tübke、Thorsten Koslowski、Ingo Krossing
DOI:10.1002/chem.201400168
日期:2014.7.28
Several, partly new, ionic liquids (ILs) containing imidazolium and ammonium cations as well as the medium‐sized [NTf2]− (0.230 nm3; Tf=CF3SO3−) and the large [Al(hfip)4]− (0.581 nm3; hfip=OC(H)(CF3)2) anions were synthesized and characterized. Their temperature‐dependent viscosities and conductivities between 25 and 80 °C showed typical Vogel–Fulcher–Tammann (VFT) behavior. Ion‐specific self‐diffusion
几个,部分新,离子液体(离子液体)含咪唑鎓和铵阳离子以及中型[NTF 2 ] -(0.230纳米3 ; TF = CF 3 SO 3 - )和大[铝(HFIP)4 ] -(0.581nm 3; hfip = OC(H)(CF 3)2合成并表征了阴离子。它们在25至80°C之间随温度变化的粘度和电导率表现出典型的Vogel–Fulcher–Tammann(VFT)行为。在室温下,通过脉冲梯度激发回波(PGSTE)NMR实验测量了离子特异性自扩散常数。通常,基于[Al(hfip)4 ] -的离子液体中阳离子和阴离子的自扩散常数都高于基于[NTf 2 ] -的离子液体中的阳离子。根据自扩散常数和测得的体积电导率计算离子性,结果表明基于[Al(hfip)4 ] -的离子液体比[NTf 2 ] -产生更高的离子性。类似物,在某些情况下前者几乎达到100%的值。从这些观察结果可以得出结论,基于[Al(hfip)4