Basicity Characterization of Imidazolyl Ionic Liquids and Their Application for Biomass Dissolution

Figure 3

UV-Vis absorption of BTB in alkaline and acidic solutions and in different concentrations of alkaline ionic liquids. ((a) BTB in alkaline and acidic solutions; (b) BTB in 0.1 M ionic liquid; (c) BTB in 0.05 M ionic liquid; (d) BTB in 0.01 M ionic liquid.)

(a)

(b)

(c)

(d)