Figure 3.
Mechanism of the Steglich esterification with the GO/RGO: (a) acid–base reaction of the carboxyl group with DMAP, (b) activation with a carbodiimide reagent, (c) reaction with DMAP, (d and e) desired reaction pathway (ester or amide bond formation), (d and f) reaction of the activated carboxyl group with water molecules.
