Synthesis of Hydrogen-Bond Donating UiO-66 Derivatives by Post-Synthetic Modification for Adsorption of Hazardous Chemicals
Abstract
New metal-organic framework (MOF) sorbents are developed based on the UiO-66 series as a scaffold for grafted sorbent moieties. Post-synthetic modification of UiO-66-NH2 is performed via condensation reactions with benzaldehyde and benzoic acid derivatives to install hydrogen-bond donating groups within the framework. Analysis performed by nuclear magnetic resonance spectroscopy to characterize the digested MOFs supports successful linker functionalization. The effects of varying the electronic properties of MOF substituents (i.e. electron-donating and electron-withdrawing) on sorbent properties are investigated. Most notably, incorporation of functional groups into the MOFs is shown to benefit sorbate uptake capacity and increase sorbent binding affinity for targeted chemicals, demonstrating the viability of this approach to sorbent design. However, beneficial design criteria may not be universal and may vary by functionalization approach, suggesting each system must be carefully studied to optimize sorbent performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 10, 2023
- Accession Number
- AD1212714
Entities
People
- Christopher J. Breshike
- Daniel A. Corbin
- Michael R. Papantonakis
- R. A. Mcgill
- Thomas C. Cao
- Viet K. Nguyen
Organizations
- United States Naval Research Laboratory