School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, UK.
Phys Chem Chem Phys. 2011 Sep 7;13(33):15244-55. doi: 10.1039/c1cp21053j. Epub 2011 Jul 22.
We investigate seven 1-alkyl-1-methylpyrrolidinium-based ionic liquids, [C(n)C(1)Pyrr][X], using X-ray photoelectron spectroscopy (XPS). The electronic environment for each element is analysed and a robust fitting model is developed for the C 1s region that applies to each of the ionic liquids studied. This model allows accurate charge correction and the determination of reliable and reproducible binding energies for each ionic liquid studied. The electronic interaction between the cation and anion is investigated for ionic liquids with one and also two anions. i.e., mixtures. Comparisons are made to imidazolium-based ionic liquids; in particular, a detailed comparison is made between [C(8)C(1)Pyrr][X] and [C(8)C(1)Im]X, where X(¬) is common to both ionic liquids.
我们使用 X 射线光电子能谱（XPS）研究了七种 1-烷基-1-甲基吡咯烷鎓基离子液体 [C(n)C(1)Pyrr][X]。分析了每个元素的电子环境，并为 C 1s 区域开发了一个稳健的拟合模型，适用于所研究的每一种离子液体。该模型允许进行精确的电荷校正，并确定所研究的每种离子液体的可靠和可重复的结合能。还研究了具有一个阴离子和两个阴离子（即混合物）的离子液体中阳离子和阴离子之间的电子相互作用。与基于咪唑鎓的离子液体进行了比较；特别是，详细比较了 [C(8)C(1)Pyrr][X] 和 [C(8)C(1)Im]X，其中 X(¬) 是两种离子液体共有的。
