Perfluoroalkyltricyanoborate and Perfluoroalkylcyanofluoroborate Anions: Building Blocks for Low-Viscosity Ionic Liquids
作者:Johannes Landmann、Jan A. P. Sprenger、Philipp T. Hennig、Rüdiger Bertermann、Matthias Grüne、Frank Würthner、Nikolai V. Ignat'ev、Maik Finze
DOI:10.1002/chem.201703685
日期:2018.1.12
K[CnF2 n+1B(CN)3] [n=1 (1 d), 2 (2 d)] and the potassium mono(perfluoroalkyl)cyanofluoroborates K[CnF2 n+1BF(CN)2] [n=1 (1 c), 2 (2 c)] and [CnF2 n+1BF2(CN)]− [n=1 (1 b), 2 (2 b), 3 (3 b), 4 (4 b)] are accessible with perfect selectivities on multi‐gram scales starting from K[CnF2 n+1BF3] and Me3SiCN. The K+ salts are starting materials for the preparation of salts with organic cations, for example, [EMIm]+ (EMIm
全氟烷基三氰基硼酸钾K [C n F 2 n +1 B(CN)3 ] [ n = 1(1 d),2(2 d)]和单(全氟烷基)氰基氟硼酸钾K [C n F 2 n +1 BF(CN)2 ] [ n = 1(1 c),2(2 c)]和[C n F 2 n +1 BF 2(CN)] − [ n = 1(1 b),2(2 b),3(3 b),4(从K [[C n F 2 n +1 BF 3 ]和Me 3 SiCN开始,可以在几克尺度上以完美的选择性访问4 b)] 。K +盐是制备带有有机阳离子的盐的原料,例如[EMIm] +(EMIm = 1-乙基-3-甲基咪唑鎓)。这些[EMIm] +盐是疏水性室温离子液体(RTIL),在热,化学和电化学方面非常坚固,可提供高达5.8 V的电化学窗口。本文所述的RTIL具有非常低的粘度,最低为14.0 mPa s [EMIm] 1 c在20°C时,[EMIm]的低熔点低至-57°C2