Incorporation of CO2 in efficient oxazolidinone synthesis at mild condition by covalent triazine framework designed with Ag nanoparticles

Abstract

We have synthesized a new hybrid material, Ag0@CTFN in which small-sized Ag-nanoparticles (Ag-NPs) are anchored on the surface of covalent triazine framework nanosheet (CTFN). Here, CTFN works as the support as well as the capping agent for the small-sized Ag-NPs. Ag0@CTFN has been synthesized in a one pot method where Ag-NPs attach with the nitrogen atoms present in the triazin units. This as synthesized Ag0@CTFN material has been characterized by FTIR, XRD, N2 adsorption desorption analysis, SEM, TEM and XPS analysis. All these characterizations reveal that around 4.97 nm sized Ag-NPs are anchored on the surfaces of layer-like CTFN nanosheets. Ag0@CTFN samples have shown their excellent catalytic activity for the selectively oxazolidinone formation from propargyl alcohol and amine by fixing CO2 under mild reaction condition. Moreover, this is the first report on Ag0@CTFN hybrid material which catalyze the oxazolidinone synthesis by fixing CO2. Again, this catalyst has shown their recyclability for oxazolidinone synthesis reaction up to sixth cycle by keeping their activity almost intact. There is no metal or catalyst leaching noticed up to sixth cycle for this reaction.