Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 36, Pages 14876-14882Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta02941k
Keywords
-
Funding
- University of Nebraska-Lincoln and Nebraska Center for Energy Sciences Research
- UNL Holland Computing Center
Ask authors/readers for more resources
We report a systematic synthesis of twelve porphyrinic porous organic frameworks (por-POF-n, n - 1-12) using building blocks with different sizes and connectivities, and we show that as the monomer's size and connectivity increase, the BET surface area and gas uptake capacity of the resulting por-POFs consistently increase, which suggests minimized network interpenetration. Importantly, we demonstrate that the metal center in por-POF-8 can be modified through a post-synthetic demetallation-remetallation process, which provides an excellent opportunity to investigate the effect of the coordinatively unsaturated metal sites on gas adsorption. In particular, demetallated por-POF-8-2H and remetallated por-POF-8-FeCl and por-POF-8-Ni exhibit similar isosteric heats of adsorption (Q(st)) toward H-2 and CO2, which indicates that there is a limited effect of the porphyrin metal center on the gas uptake of por-POFs. This finding is further supported by a density-functional theory (DFT) calculation. The post-synthetically generated por-POF-8-FeCl shows an excellent biomimetic catalytic activity towards the oxidation of pyrogallol, demonstrating the great potentials of highly stable por-POFs as a new class of biomimetic catalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available