Table 2 Names and abbreviations of the PILs used in this study

N,N-dimethylethanolammonium acetate

[DMEtA][OAc]

N,N-dimethylethanolammonium propionate

[DMEtA][Pr]

N,N-dimethylethanolammonium hexanoate

[DMEtA][Hex]

N,N-dimethylethanolammonium octanoate

[DMEtA][Oct]

N,N-dimethylethanolammonium glycolate

[DMEtA][Gly]

N,N-dimethylethanolammonium succinate

[DMEtA][Succ]

N,N-dimethylethanolammonium chloride

[DMEtA][Cl]

N-methyl-N-ethylethanolammonium acetate

[EMEtA][OAc]

N,N-diethylethanolammonium acetate

[DEEtA][OAc]

N-butyldiethanolammonium acetate

[BDEtA][OAc]

N-methyl-bis(2-methoxyethyl)ammonium acetate

[MDEOMA][OAc]

N-methylethanolammonium acetate

[MEtA][OAc]

Diethanolammonium acetate

[DEtA][OAc]

Diethanolammonium chloride

[DEtA][Cl]

Bis(2-methoxyethyl)ammonium acetate

[DEOMA][OAc]

Bis(2-methoxyethyl)ammonium chloride

[DEOMA][Cl]