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Citation: WU Yan-Ping, CHEN Song-Tao, LU Wei-Qi. ATR-FTIR Study on Ionic Solvation and Ion Association of Lithium Nitrate in N,N-dimethylformamide[J]. Chinese Journal of Applied Chemistry, ;2004, 21(11): 1174-1177. shu

ATR-FTIR Study on Ionic Solvation and Ion Association of Lithium Nitrate in N,N-dimethylformamide

1.
a Department of Chemistry, Foshan University, Foshan 528000;
2.
b Department of Chemical Engineering, Pingdingshan Engineering College, Pingdingshan

Corresponding author: WU Yan-Ping,
Received Date: 20 December 2003
Available Online: 20 May 2004

The solvation number of lithium cation and ion association of lithium nitrate in N,N-dimethylformamide(DMF) have been investigated by ATR-FTIR spectroscopy. Splittings of O=C-N deformation and shift of carbonyl stretching band of DMF suggest that there is a strong interaction between oxygen atoms of DMF and lithium cations. The solvation numbers of lithium ion have been calculated quantitatively based on these facts. The band fitting for the ν₂(NO-out-of-plane bending) band of the NO₃^- shows free anions and contact ionic pairs coexist in the solution.
- lithium nitrate,
- N,N-dimethylformamide,
- ionic solvation,
- ion association,
- infrared spectroscopy
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