期刊
ANALYTICAL SCIENCES
卷 24, 期 10, 页码 1377-1380出版社
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.24.1377
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [17350037, 18850017, 19003963, 19350033]
- Grants-in-Aid for Scientific Research [18850017, 17350037, 19350033] Funding Source: KAKEN
Solvation structures of manganese(II), cobalt(II), nickel(II) and zinc(II) ions in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide (EMI(+)TFSA(-)) have been studied by UV-Vis, FT-IR and FT-Raman spectra. The ionic liquid involves TFSA(-) conformers with C-1 (cis) and C-2 (trans) symmetries, and both conformers coexist in equilibrium in the liquid state. The results showed that these metal(II) ions are all six-coordinated with three TFSA(-) ions, i.e., TFSA(-) ligates as a bidentate O-donor in the ionic liquid. Although the metal ion strongly prefers the C-1 conformer in crystals, the metal ion coordinates both the C-1 and C-2 conformers in the liquid state, and the conformational equilibrium in the bulk only slightly shifts to the C-1 conformer in the coordination sphere. We concluded that the conformational equilibrium in the coordination sphere is strongly temperature-sensitive.
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