Electronic Supplementary Information (ESI)
Hua Zhao,
1*
Gary A. Baker,
2
Zhiyan Song,
1
Olarongbe Olubajo,
1
Tanisha Crittle,
1
and Darkeysha Peters
1
1
Chemistry Program, Savannah State University, Savannah, GA 31404, USA
2
Chemical Sciences Division, Oak Ridge !ational Laboratory,
Oak Ridge, T! 37831, USA
All Tf
2
N
,
based ILs ([choline][Tf
2
N] (), [Amm110][Tf
2
N] (!), [EMIM][Tf
2
N]
("), [BMIM][Tf
2
N] (#), and [HMIM][Tf
2
N] ($)) were synthesized through a precipitation
reaction:
13
an aqueous solution of halide,based IL (1 molar equiv.) was added drop wise
into Li[Tf
2
N] (1.1 molar equiv) solution. A turbid was formed immediately. The reaction
mixture was stirred at room temperature for at least 2 h until the formation of two layers.
After the phase separation, the IL layer was thoroughly washed with water three times.
The silver nitrate test on the aqueous layer suggested the absence of halides. The
resulting IL was collected and dried in an oven at 100 °C over 24 h. Acros® 3A
molecular sieves were added into ILs to remove residual water.
1
H NMR, FT,IR and
HPLC data confirmed that the prepared ILs are free of measurable impurities.
All dca
,
or HCOO
,
based ILs ([choline][dca] (%), [Amm110][dca] (&),
[Amm110][HCOO] (’), [BMIM][dca] ("), and [BMIM][HCOO] (!)) were prepared
*
Corresponding authors. Email: zhaoh@savstate.edu (or huazhao98@gmail.com).
Supplementary Material (ESI) for Green Chemistry
This journal is © The Royal Society of Chemistry 2008