Zn (II) @ TFP-DAQ COF: An efficient mesoporous catalyst for the synthesis of N-methylated amine and carbamate through chemical fixation of CO2
Selective N-methylation and carbamate formation reactions are demonstrated via chemical incorporation of CO2 using Zn loaded TFP-DAQ COF (Covalent Organic Framework) as active catalyst under mild reaction condition. Selective N-methylation and N-formylation reactions are occurred by simply varying the type of solvent. The Zn (II) @ TFP- DAQ COF catalyst is characterized by different characterization tools like PXRD, FTIR, UV-vis, N2 adsorption–desorption studies, FESEM and TEM. The catalyst material showed pores in mesoporous region with high surface area 1117.375 m²/g. The synthesized material is applied as a cheap catalyst for N-methylation of secondary amines and in carbamate formation reactions with high yields of the desired products upto 98.5% and 97% respectively with > 99% selectivity. The catalyst is found to be completely heterogeneous and reusable for multiple reaction cycles.