Spectroscopy and Spectral Analysis, Volume. 41, Issue 10, 3106(2021)
Studies on the Effects of Sodium Hydroxide on Hydrogen Bonding of Water and Ionic Liquid/H2O Systems by ATR-IR Analyses
Figures & Tables(5)
Fig. 1. ATR-IR spectra of NaOH solutions with different concentrations
Fig. 2. Deconvolution spectra of NaOH solutions (a) and the second derivative spectra of NaOH solutions (b)
Fig. 3. ATR-IR spectra of H2O, EmimAc and EmimAc/H2O
(a): Local figure of 3 800~2 700 cm-1;(b): Local figure of 1 800~1 000 cm-1
Fig. 4. ATR-IR spectra of H2O, EmimAc and EmimAc/H2O
(a): Local figure of 3 800~2 700 cm-1;(b): Local figure of 1 800~900 cm-1
Table 1. Assignments of the bands in the ATR-IR spectra of EmimAc
View tableView in ArticleTable 1. Assignments of the bands in the ATR-IR spectra of EmimAc
波数/cm-1 归属 701 咪唑环面外不对称弯曲振动 咪唑啉型的振动模式 761 咪唑环HCCH基团的不对称弯曲振动以及NC(H)N基团的弯曲振动 805 咪唑环HCCH基团的不对称弯曲振动以及NC(H)N基团的弯曲振动 900 CCH基团的弯曲振动 957 CC基团的伸缩振动 1 001 C—N—C基团的对称伸缩振动 1 047 CCH基团的剪切 1 089 C—C基团的伸缩振动模式 1 173 (N)CH2, CH3(N)CN基团的面内不对称伸缩振动以及CC基团的拉伸振动 OAc中C＝O的振动引起的咪唑环上C—H基团的面内变形振动 1 258 醋酸根中C—CH3基团的伸缩振动 不饱和C以及芳香环骨架的伸缩振动, 表明咪唑环结构的存在 1 327 —CH2—基团的卷积振动 1 378 咪唑环的面内不对称伸缩振动, CH2(N)基团的不对称弯曲振动, CC, CH2(N)及CH3(N)CN基团的不对称伸缩振动 1 427 与—CH2—基团相连的—COOH基团的面内弯曲振动 1 560 C＝O基团的拉伸振动 2 976 N-甲基的伸缩振动 烷基的伸缩振动, 咪唑环上C—H基团伸缩振动 3 049 C2—H基团的拉伸振动 3 144 C4, 5—H基团的拉伸振动
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Liu-fang NI, Jing YU, Xin-ping WANG, Jun WANG, Xiao-xia CAO, Shi-lin CAO, Xiao-juan MA. Studies on the Effects of Sodium Hydroxide on Hydrogen Bonding of Water and Ionic Liquid/H2O Systems by ATR-IR Analyses[J]. Spectroscopy and Spectral Analysis, 2021, 41(10): 3106
Paper Information
Category: Research Articles
Received: Nov. 23, 2020
Accepted: --
Published Online: Oct. 29, 2021
The Author Email: NI Liu-fang (niliufang@fjut.edu.cn)
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