Supplementary Information for
Electrochemical supercapacitor properties of polyaniline (PANI) thin films
in organic salt added electrolytes
Yongcheol Jo,1 Won-Je Cho,2 A. I. Inamdar,1 Byung Chul Kim,3 Jongmin Kim,1
Hyungsang Kim,1 Hyunsik Im,1,a) Kook-Hyun Yu,2,b) and Dae-Young Kim3
1
Division of Physics and Semiconductor Science, Dongguk University, Seoul 100-715, Korea
2
Department of Chemistry, Dongguk University, Seoul 100-715, Korea
3
Department of Biological & Environmental Science, Dongguk University, Seoul 100-715, Korea
Synthesis and analysis of organic salt N1,N1,N1,N6,N6,N6-hexamethylhexane-1,6diaminiumtetrafluoroborate(C6((TMA)(BF4))2)
Figure S1 (a) shows the schematic for the synthesis of N1,N1,N1,N6,N6,N6hexamethylhexane-1,6-diaminiumtetrafluoroborate(C6((TMA)(BF4))2)
organic
salt.
Trimethylamine (Aldrich) was mixed with 1,6-dibromohexane in ethanol, and the mixture
wasrefluxed for 48h at 40C. The solvent ethanol and residue were removed using a vacuum
evaporator at 70C. The collected compound was dissolved in acetone, and mixed with anion
sources of NaBF4. Then, metathesis was performed at room temperature for 24h with stirring.
A white precipitate was formed and eliminated by filtration. The collected solution was dried
in a vacuum oven at 70C for 24h. Finally, the sample was purified using Al2O3 in
acetonitrile (ACN) to remove inorganic ion residues such as Na+, and Br-. The use of ACN in
ILs that significantly exceeds an impact of solvents. The structural formation of organic salt
was elucidated using 1H-NMR spectroscopy.
Figure S1. (a) Schematic for the synthesis of ionic liquid: N1,N1,N1,N6,N6,N6hexamethylhexane-1,6-diaminiumtetrafluoroborate ( C6((TMA)(BF4))2) (b) 1H NMR spectra
of 1,6-bis(Trimethylammonium-1-yl)hexane tetrafluoroborate; inset shows the chemical
scheme for the 1,6-bis(Trimethylammonium-1-yl)hexane tetrafluoroborate.
Figure S1 (b) shows the 1H-NMR spectra of the organic salt.
The inset shows the
molecular structure of the prepared ionic liquid. The N1,N1,N1,N6,N6,N6-hexamethylhexane1,6-diaminiumtetrafluoroborate ( C6((TMA)(BF4))2) was identified with the following details:
melting point 340~350℃, 1H-NMR, 200MHz(DMSO-d6): δ (ppm) 3.46(s, 18H), 3.29(t, 4H),
1.73(q, 4H), 1.33(q, 4H).