ic9b03422_si_001.pdf (1.48 MB)
Synergistic Role of Microwave and Perturbation toward Synthesis of Hierarchical Porous MOFs with Tunable Porosity
journal contribution
posted on 2020-02-24, 19:05 authored by Subhajit Laha, Anindita Chakraborty, Tapas Kumar MajiCreating
hierarchical porosity in MOFs has attracted significant
interest due to their immense potential in a wide range of applications
from materials to life science. Herein, we report a unique methodology
of combining perturbation assisted nanofusion (PNF) with microwave
(MW) stimuli to generate wide additional pores from (5–18)
nm in the prototype MOF, Ni-MOF-74. An optimized combination of microwave
exposure, perturbation in form of stirring, and solvent effect induces
additional mesoscale porosity by fusion of MOF nanoparticles. The
effect of microwave is realized by varying reaction time and medium
using a range of solvents having different dielectric constant (DMSO,
DMF, DMA, acetone, EA, and THF). Introducing this method, for the
first time, we are able to generate a wide scale mesopore by fusion
of nanoscale microporous MOF within a short reaction time by vigorous
stirring, without using any template. This additional mesopore, thus
generated, has been exploited by encapsulating 4.6 μmol·g–1 of large biomolecule Vitamin B12 (VB12).