Two neutral compounds (BOH and THBP), HPLC-grade acetonitrile (ACN), ammonium formate (99%, NH4COOH), formic acid (95%), acetic acid (99%), dimethyl sulfoxide (99%, DMSO) and TM-β-CD (90%) were purchased from Sigma-Aldrich (St. Louis, MO, USA). The other two neutral compounds (TFAE and TSO) were purchased from TCI AMERICA (Tokyo, Japan). Sodium acetate (NaOAc), sodium hydroxide (NaOH) (50% w/w), sodium phosphate dibasic heptahydrate and sodium phosphate monobasic monohydrate were purchased from Fisher Scientific (Fair Lawn, NJ, USA). Triply deionized (DI) water used in this experiment was obtained from Barnstead Nanopure II water system (Barnstead International, Dubuque, IA, USA).
The reagents ω-undecylenyl alcohol, 2-bromoethylamine hydrobromide, pyridine anhydrous, L-leucinol, L-alaninol, L-valinol, L-isoleucinol, (1S,2R)-ephedrine hydrochloride, formic acid (≥95), formaldehyde (37% (wt/wt) solution in water) used for the synthesis of ILs were all purchased from Sigma-Aldrich (St. Louis, MO, USA). Triphosgene was obtained from TCI AMERICA (Tokyo, Japan). Sodium sulfate anhydrous and sodium bicarbonate were purchased from Fisher Scientific (Fair Lawn, NJ, USA).
The reagents ω-undecylenyl alcohol, 2-bromoethylamine hydrobromide, pyridine anhydrous, L-leucinol, L-alaninol, L-valinol, L-isoleucinol, (1S,2R)-ephedrine hydrochloride, formic acid (≥95), formaldehyde (37% (wt/wt) solution in water) used for the synthesis of ILs were all purchased from Sigma-Aldrich (St. Louis, MO, USA). Triphosgene was obtained from TCI AMERICA (Tokyo, Japan). Sodium sulfate anhydrous and sodium bicarbonate were purchased from Fisher Scientific (Fair Lawn, NJ, USA).