1 research outputs found
Rapid, Microwave-Assisted Synthesis of Cubic, Three-Dimensional, Highly Porous MOF-205 for Room Temperature CO<sub>2</sub> Fixation via Cyclic Carbonate Synthesis
A dual-porous, three-dimensional,
metal–organic framework [Zn<sub>4</sub>OÂ(2,6-NDC)Â(BTB)<sub>4/3</sub>] (MOF-205, BET = 4200 m<sup>2</sup>/g) has been synthesized
using microwave power as an alternative energy source for the first
time, and its catalytic activity has been exploited for CO<sub>2</sub>–epoxide coupling reactions to produce five-membered cyclic
carbonates under solvent-free conditions. Microwave synthesis was
performed at different time intervals to reveal the formation of the
crystals. Significant conversion of various epoxides was obtained
at room temperature, with excellent selectivity toward the desired
five-membered cyclic carbonates. The importance of the dual porosity
and the synergistic effect of quaternary ammonium salts on efficiently
catalyzed CO<sub>2</sub> conversion were investigated using various
experimental and physicochemical characterization techniques, and
the results were compared with those of the solvothermally synthesized
MOF-205 sample. On the basis of literature and experimental inferences,
a rationalized mechanism mediated by the zinc center of MOF-205 for
the CO<sub>2</sub>–epoxide cycloaddition reaction has been
proposed