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. Author manuscript; available in PMC: 2018 Jul 19.
Published in final edited form as: J Phys Chem B. 2015 Nov 5;119(46):14756–14765. doi: 10.1021/acs.jpcb.5b08658

Table 4.

Activation volumes for ionic self-diffusion and fluidity for selected ILs, and calculated ionic volumes. All volumes are in cm3/mol and measured at 25 °C unless noted.

Ionic Liquid ΔV‡cation ΔV‡anion ΔV‡fluidity Vcationa Vaniona
EMIM TFSA 14.6 ± 1.3 b (22 °C) 28.8 ± 2.5 b (22 °C) 25.9 ± 0.7 d 70.2 95.6
BMIM TFSA i 19.2 ± 1.4 b (27 °C) 22.6 ± 2.7 b (27 °C) 27.3 ± 0.2 e 90.6 95.6
HMIM TFSA i – – 27.4 ± 0.2 d
25.4 ± 0.3 d (50 °C)		 111.1 95.6
EMIM FSA 12.9 ± 0.9 b (22 °C) 11.0 ± 1.5 b (22 °C) – 70.2 65.0
EMIM BF4 14.0 ± 1.0 b (22 °C) 15.3 ± 1.4 b (22 °C) 24.4 ± 1.0 (20 °C) f 70.2 30.4
BMIM BF4 i 22.0 ± 0.4 c
19.0 ± 0.2 c (50 °C)		 No data at 25 °C
18.9 ± 0.7 c (50 °C)		 25.0 ± 0.1 g
21.4 ± 0.2 g (50 °C)		 90.6 30.4
HMIM BF4 i – – 29.5 ± 0.6 d
23.2 ± 0.2 d (50 °C)		 111.1 30.4
OMIM BF4 i 25.3 ± 0.8 c (50 °C) 24.7 ± 0.4 c (50 °C) 29.2 ± 0.2 h
25.5 ± 0.2 h (50 °C)		 131.6 30.4
a

Ref. 50.

b

This work.

c

Ref. 51.

d

Ref. 52.

e

Ref. 53.

f

Ref. 54.

g

Ref. 55.

h

Ref. 56.

i

BMIM = 1-butyl-3-methylimidazolium, HMIM = 1-hexyl-3-methylimidazolium, OMIM = 1-octyl-3-methylimidazolium.