Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 49, Pages 14738-14742Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506888
Keywords
metal-organic frameworks; phosphate lipids; post-synthetic modification; surface functionalization; zirconium oxo clusters
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Funding
- Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0274]
- U.S. Army [W911NF-11-1-0229]
- DTRA [HDTRA1-14-1-0014]
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- MRSEC program at the Materials Research Center a program of the National Science Foundation
- State of Illinois
- Northwestern University
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A method for modifying the external surfaces of a series of nanoscale metal-organic frameworks (MOFs) with 1,2-dioleoyl-sn-glycero-3-phosphate (DOPA) is presented. A series of zirconium-based nanoMOFs of the same topology (UiO-66, UiO-67, and BUT-30) were synthesized, isolated as aggregates, and then conjugated with DOPA to create stably dispersed colloids. BET surface area analysis revealed that these structures maintain their porosity after surface functionalization, providing evidence that DOPA functionalization only occurs on the external surface. Additionally, dye-labeled ligand loading studies revealed that the density of DOPA on the surface of the nanoscale MOF correlates to the density of metal nodes on the surface of each MOF. Importantly, the surface modification strategy described will allow for the general and divergent synthesis and study of a wide variety of nanoscale MOFs as stable colloidal materials.
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