Designing the ammonium cation to achieve a higher hydrophilicity of bistriflimide-based ionic liquids†
P. M.
Reis, 
ab
M. R. C.
Soromenho,
ab
C. E. S.
Bernardes,
c
K.
Shimizu,
c
A. A.
Freitas,
c
J. M. S. S.
Esperança,
*ab
J. N.
Canongia Lopes
*ac
and
L. P. N.
Rebelo
ab
ab
M. R. C.
Soromenho,
ab
C. E. S.
Bernardes,
c
K.
Shimizu,
c
A. A.
Freitas,
c
J. M. S. S.
Esperança,
*ab
J. N.
Canongia Lopes
*ac
and
L. P. N.
Rebelo
ab
Abstract
In this work, we have found complete water miscibility for a priori, water immiscible (highly hydrophobic) ionic liquids by chemical manipulation of the quaternary ammonium cation grafted with hydroxyethyl moieties. Specifically, we were able to obtain bistriflimide-based ionic liquids completely miscible with water, even below room temperature. The underlying reason is the full integration of the OH groups of the cation in the continuous H-bonded network of water.
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