Catalysis Letters, Vol.141, No.12, 1814-1820, 2011
An Efficient and Eco-friendly MoO3-SiO2 Solid Acid Catalyst for Electrophilic Aromatic Nitration with N2O5
Electrophilic aromatic nitration using N2O5 as a green nitrating agent catalyzed by MoO3-SiO2 under mild conditions has been described. A series of MoO3-SiO2 catalysts with varying MoO3 loadings (5-20 mol%) were prepared by sol-gel technique and characterized using FTIR, XRD, SEM, BET and NH3-TPD to study its surface properties. MoO3-SiO2 shows good catalytic activity and reusability for the nitration of alkyl and halogen aromatics giving high conversions, but less efficiency for the deactivated aromatics. Reactions conducted under non-acidic conditions using N2O5 makes the process safe and environmentally friendly.