Selective nitration of phenol to o-nitrophenol in the presence of metal-free reduced graphene oxide at room temperature

摘要: We report here a reduced graphene oxide (RGO)-catalyzed ultra-efficient, highly selective and low temperature synthesis of o-nitrophenol using phenol nitric acid in an equimolar ratio. The effects various parameters such as concentration reactants, type catalyst, weight the solvent, time reaction on catalytic have been explored. optimum conditions for nitration observed 1 : 1 molar ratio to presence 50 mg RGO dichloroethane at room 3 h with turn over frequency (TOF) 10.96 × 1017 molecules g−1 s−1 rate 12.17 1014 mL−1 s−1. In order explore decrease efficiency catalyst during reuse, both parent used characterized by XRD, Raman, SEM, EDX, BET FT-IR. large surface area promotes activity aromatic compounds via smooth high conversion products fine regioselectivity. So this protocol opens up new avenue temperature.