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. 2019 Jan 15;9(4):2026–2033. doi: 10.1039/c8ra07867j

Calculated S0 → S1 absorption wavelength (λabs), Mülliken charges (q) of carbon atom at 4 position of imidazolium ring in fundamental (S0) and first excited (S1) electronic state and octanol–water partition coefficient (KOW).

Ionic liquid Independents ions (C + A) Ion-pair (CA) log KOW (ref. 4)
λ abs (nm) q Mülliken λ abs (nm) q Mülliken
C4 (S0) C4 (S1) C4 (S0) C4 (S1)
[Emim][Cl] 199.9 −0.092 −0.061 372.3 −0.146 −0.215 −5.4
[Bmim][Cl] 200.8 −0.094 −0.069 370.3 −0.187 −0.260 −4.4
[Dcmim][Cl] 195.9a −0.081 −0.147 370.7 −0.102 −0.197 −1.2
[Bmim][BF4] 200.8 −0.094 −0.069 197.4 0.002 −0.017 −2.0
[Bmim][FAP] 200.8 −0.094 −0.069 218.1 −0.034 −0.131 5.3
[Allylmim][Cl] 227.4 −0.150 −0.179 373.7 0.032 −0.032 −5.0
[EtOHmim][Cl] 230.3 −0.027 −0.021 373.8 −0.106 −0.183 1.4
[Bu4MePy][Cl] 233.4 756.6 −3.8