Iwahashi Takashi, Ishiyama Tatsuya, Sakai Yasunari, Morita Akihiro, Kim Doseok, Ouchi Yukio
Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8552, Japan.
Department of Environmental Applied Chemistry, Faculty of Engineering, University of Toyama, Gofuku, Toyama-shi, Toyama, 930-8555, Japan.
Phys Chem Chem Phys. 2021 Mar 4;23(8):5028-5030. doi: 10.1039/d1cp00171j.
In our recent paper titled "Bi-layering at ionic liquid surfaces: a sum-frequency generation vibrational spectroscopy- and molecular dynamics simulation-based study" co-authored by T. Iwahashi, T. Ishiyama, Y. Sakai, A. Morita, D. Kim, and Y. Ouchi, Phys. Chem. Chem. Phys., 2020, 22, 12565 (hereafter referred to as IW), the sum-frequency (SF) spectra for a homologous series of 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([Cnmim][TFSA] n = 4, 6, 8, 10, and 12) were reported. In particular, a clear decrease in the SF signals from the [TFSA]- anions with increasing chain length of the [Cnmim]+ cation (Fig. 5 of IW) was explained in terms of "head-to-head" bi-layer formation at the air/ionic liquid (IL) interface. A comment by M. Deutsch et al. (hereafter referred to as DE) questioned this report, claiming that our proposed structure is not consistent with a multilayered electron density (ED) profile obtained by X-ray reflectivity (XR).
在我们最近由岩桥彻、石山智、酒井洋、森田明、金东和大内洋共同撰写的题为《离子液体表面的双层结构：基于和频振动光谱与分子动力学模拟的研究》的论文（发表于《物理化学化学物理》，2020年，第22卷，第12565页，以下简称IW）中，报道了一系列1-烷基-3-甲基咪唑鎓双（三氟甲磺酰）亚胺（[Cnmim][TFSA]，n = 4、6、8、10和12）的和频（SF）光谱。特别是，随着[Cnmim]+阳离子链长增加，[TFSA]-阴离子的SF信号明显下降（IW的图5），这被解释为在空气/离子液体（IL）界面形成了“头对头”双层结构。M. Deutsch等人（以下简称DE）的一篇评论对该报告提出质疑，声称我们提出的结构与通过X射线反射率（XR）获得的多层电子密度（ED）分布不一致。
