Abstract:
In this study, zirconium, zinc, and copper-based metal organic framework catalysts were synthesized.
In order to tune the catalytic activity, the coordinative unsaturated metal–organic frameworks were
functionalized with different amines by an economical and simple post-synthetic modification strategy.
In this study, systematic investigation is made by the functionalization of metal organic frameworks with
primary, secondary, and tertiary amines by the post-synthesis method. Furthermore, the metal organic
frameworks were also functionalized with one basic ionic liquid. The materials were characterized by
powder X-ray diffraction, nitrogen adsorption, scanning electron microscopy, thermo gravimetric analysis,
Fourier transform infrared, X-ray photoelectron spectroscopy, and temperature programmed desorption
techniques. The applications of these bi-functional catalysts were investigated in the best suited model
reaction, Knoevenagel condensation. The applicability of these catalysts was extended in the synthesis of
jasminaldehyde (aldol condensation of 1-heptanal and benzaldehyde) and cyclic carbonate (cycloaddition
of CO2 to epoxide). The catalysts can be easily recovered and reused with negligible loss in the catalytic
activity even after five cycles.
