期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 124, 期 -, 页码 40-45出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.01.001
关键词
Li+-molecule interaction; Lithium tetrafluoroborate; Propylene carbonate (PC); N,N-dimethylformamide (DMF); FTIR spectroscopy; Preferential solvation
类别
资金
- National 863 Program [2013AA110100]
- Chinese Academy of Sciences
- key laboratory of salt lakes resources and chemistry (Chinese Academy of Sciences)
FTIR (Fourier transformed infrared) spectra have been collected and analyzed for solutions of lithium tetrafluoroborate in propylene carbonate (PC), N,N-dimethylformamide (DMF), and PC + DMF mixtures. The band splitting and symmetric ring deformation for PC and O=C-N deformation for DMF suggest that there is a strong interaction between lithium cations and solvent molecules. The solvent molecules have been assigned to two types, the free and complexed molecules. By a comparison of the intensity for the corresponding bands, it has been concluded that Li+ cations are preferentially solvated by DMF molecules in the LiBF4/PC + DMF solutions. This has been explained by the difference in values of donor number (DN). (C) 2014 Elsevier B.V. All rights reserved.
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