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Elucidating Interactions between DMSO and Chelate‐Based Ionic Liquids
Author(s) -
Chen Hang,
Wang Xinyu,
Yao Jia,
Chen Kexian,
Guo Yan,
Zhang Pengfei,
Li Haoran
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500849
Subject(s) - ionic liquid , chelation , chemistry , ionic bonding , computational chemistry , inorganic chemistry , ion , organic chemistry , catalysis
The C−D bond stretching vibrations of deuterated dimethyl sulfoxide ([D 6 ]DMSO) and the C 2 −H bond stretching vibrations of 1,1,1,5,5,5‐hexafluoropentane‐2,4‐dione (hfac) ligand in anion are chosen as probes to elucidate the solvent–solute interaction between chelate‐based ionic liquids (ILs) and DMSO by vibrational spectroscopic studies. The indirect effect from the interaction of the adjacent S=O functional group of DMSO with the cation [C 10 mim] + and anion [Mn(hfac) 3 ] − of the ILs leads to the blue‐shift of the C−D stretching vibrations of DMSO. The C 2 −H bond stretching vibrations in hfac ligand is closely related to the ionic hydrogen bond strength between the cation and anion of chelate‐based ILs. EPR studies reveal that the crystal field of the central metal is kept when the chelate‐based ILs are in different microstructure environment in the solution.