Loading...
Modulation of water vapor sorption by pore engineering in isostructural square lattice topology coordination networks
Date
2024
Abstract
We report a crystal-engineering study conducted upon a platform of three mixed-linker square lattice (sql) coordination networks of general formula [Zn(Ria)(bphy)] [bphy = 1,2-bis(pyridin-4-yl)hydrazine, H2Ria = 5-position-substituted isophthalic acid, and R = −Br, −NO2, and −OH; compounds 1−3]. Analysis of single-crystal X-ray diffraction data of 1−2 and the simulated crystal structure of 3 revealed that 1−3 are isomorphous and sustained by bilayers of sql networks linked by hydrogen bonds. Although similar pore shapes and sizes exist in 1−3, distinct isotherm shapes (linear and S shape) and uptakes (2.4, 11.6, and 13.3 wt %, respectively) were observed. Ab initio calculations indicated that the distinct water sorption properties can be attributed to the R groups, which offer a range of hydrophilicity. Calculations indicated that the significantly lower experimental uptake in compound 1 can be attributed to a constricted channel. The calculated water-binding sites provide insights into how adsorbed water molecules bond to the pore walls, with the strongest interactions, water−hydroxyl hydrogen bonding, observed for 3. Overall, this study reveals how pore engineering can result in large variations in water sorption properties in an isomorphous family of rigid porous coordination networks.
Supervisor
Description
Publisher
American Chemical Society
Citation
ACS Applied Materials & Interfaces 2024 16 (26), pp. 34402-34408
Collections
Files
Loading...
Li_2024_Modulation.pdf
Adobe PDF, 4.55 MB
Funding code
Funding Information
M.J.Z. would like to acknowledge the support of Science Foundation Ireland (SFI Awards 16/IA/4624), the Irish Research Council (IRCLA/2019/167), the European Research Council (ADG 885695)
Sustainable Development Goals
External Link
Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/4.0/