“…1 H NMR (400 MHz, DMSO-d6, TMS): δ 9.37 (s, 1H), 7.85 (s, 2H), 7.37–7.26 (m, 4H), 5.43 (s, 2H), 4.20 (t, J = 6.0 Hz, 2H), 3.51 (s, 2H), 2.46–2.40 (m, 4H), 1.81–1.74 (m, 2H), 1.27–1.22 (m, 2H), 0.97–0.88 (m, 9H). The ionic liquid 1-benzyl-3-butylimidazolium bromide (BnBimBr) was synthesized by a reported method (Ji et al, 2018).…”