Cyclic Quaternary Ammonium Ionic Liquids with Perfluoroalkyltrifluoroborates: Synthesis, Characterization, and Properties
作者:Zhi-Bin Zhou、Hajime Matsumoto、Kuniaki Tatsumi
DOI:10.1002/chem.200500930
日期:2006.3.1
and compared to those of their corresponding [BF4]- and [(CF3SO2)2N]- salts. The structural effect on all the above properties was intensively studied in terms of the identity of the cation and anion, variation of the side chain in the cation (i.e., alkyl versus alkyl ether), and change in the length of the perfluoroalkyl group (R(F)) in the [R(F)BF3]- ion. The reduction of Li+ ions and reoxidation of
由N-烷基(烷基醚)-N-甲基吡咯烷鎓,-恶唑烷鎓,-哌啶鎓或-吗啉鎓阳离子(烷基= nC4H9,烷基醚= CH3OCH2,CH3OCH2CH2)和全氟烷基三氟硼酸根阴离子([R(合成并表征R(F)= CF 3,C 2 F 5,nC 3 F 7,nC 4 F 9)。这些盐大多数在室温下为液体。测量了这些盐的关键特性-相变,热稳定性,密度,粘度,电导率和电化学窗口-并将其与相应的[BF4]-和[(CF3SO2)2N]-盐进行比较。就阳离子和阴离子的身份,阳离子侧链的变化(即烷基对烷基醚),以及[R(F)BF3]-离子中全氟烷基(R(F))长度的变化。在纯的N-丁基-N-甲基吡咯烷鎓五氟乙基三氟硼酸酯作为支持电解质中,发生Li +离子的还原和锂金属的再氧化。这样的全面研究增强了为许多应用(包括电解质)设计和优化离子液体所必需的知识。这些新盐中的某些显示出所需的特性,包括低熔点,高热稳定性,低粘