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Physicochemical characterization of paramagnetic ionic liquids 1‐vinyl‐3‐alkylimidazolium tetrahalogenidoferrate(III) [VRIM][FeCl m Br 4 − m ]
Author(s) -
Tang Yimei,
Hu Xiaoling,
Guan Ping,
Lin Xiangping,
Li Xiaoqian
Publication year - 2014
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.3291
Subject(s) - chemistry , ionic liquid , solubility , paramagnetism , raman spectroscopy , alkyl , ionic bonding , absorption spectroscopy , thermal stability , absorption (acoustics) , magnetic susceptibility , ion , inorganic chemistry , analytical chemistry (journal) , organic chemistry , crystallography , catalysis , physics , quantum mechanics , acoustics , optics
Using microwave‐assisted synthesis method, a series of paramagnetic ionic liquids comprising 1‐vinyl‐3‐alkylimidazolium VRIM + cation and tetrahalogenidoferrate (III) FeCl m Br 4 − m − anion were designed and synthesized. The structure was analyzed using 1 H NMR and Raman spectroscopy . Ultraviolet–visible absorption spectra, thermal stability , magnetic susceptibility, viscosity, ionic conductivity, and solubility were characterized. Results show that elongation of the alkyl chain leads to replacement of bromides with a small amount of chlorides in the anion, shifting of UV maximum absorption peaks to shorter wavelengths, reduction of ionic conductivity, and solubility in polar solvents, as well as increase in fluidity, magnetic susceptibility, and solubility in nonpolar solvents. Copyright © 2014 John Wiley & Sons, Ltd.