Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2020
Previous Article Next Article

Two Co-based MOFs assembled from an amine-functionalized pyridinecarboxylate ligand: inorganic acid-directed structural variety and gas adsorption properties

Author affiliations

Abstract

By altering inorganic acid additives under otherwise identical synthetic conditions, two MOFs termed ZJNU-16 and ZJUN-17 were successfully constructed through solvothermal reactions of Co(NO3)2·6H2O and an amine-functionalized pyridinecarboxylate ligand, namely, 5-(3-aminopyridine-4-yl)isophthalic acid. Structural analyses indicated that the two compounds exhibited inorganic acid-guided structural diversities, adopting different SBUs, ligand conformations, and network topologies. ZJNU-16 is a (3,6)-connected network with a discrete trinuclear Co3-based cluster as an inorganic SBU, while ZJNU-17 is a (3,5)-connected framework featuring a nanotubular helical Co–carboxylate chain as an inorganic SBU. Furthermore, their gas adsorption properties towards N2, C2H2, CO2, and CH4 were systematically investigated, revealing the potential of ZJNU-17 for C2H2 separation and purification under ambient conditions. At 298 K and 106.7 kPa, the C2H2 and CO2 uptake capacities reach 100.9 and 63.8 cm3 (STP) g−1, and the IAST-predicted adsorption selectivities of C2H2 over CH4 and CO2 are 15.5 and 2.5, respectively. Although the performance is moderate compared to some reported MOFs, ZJNU-17 is a rare nanotubular helical chain-based MOF exhibiting selective gas separation potential.

Graphical abstract: Two Co-based MOFs assembled from an amine-functionalized pyridinecarboxylate ligand: inorganic acid-directed structural variety and gas adsorption properties

Back to tab navigation

Supplementary files

Article information


Submitted
29 Mar 2020
Accepted
13 Apr 2020
First published
13 Apr 2020

CrystEngComm, 2020,22, 3424-3431
Article type
Paper

Two Co-based MOFs assembled from an amine-functionalized pyridinecarboxylate ligand: inorganic acid-directed structural variety and gas adsorption properties

Z. Jiang, P. Zhou, T. Xu, L. Fan, S. Hu, J. Chen and Y. He, CrystEngComm, 2020, 22, 3424
DOI: 10.1039/D0CE00475H

Social activity

Search articles by author

Spotlight

Advertisements