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Surface‐Specific Functionalization of Nanoscale Metal–Organic Frameworks
Author(s) -
Wang Shunzhi,
Morris William,
Liu Yangyang,
McGuirk C. Michael,
Zhou Yu,
Hupp Joseph T.,
Farha Omar K.,
Mirkin Chad A.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201506888
Subject(s) - surface modification , nanoscopic scale , materials science , metal organic framework , nanotechnology , zirconium , colloid , porosity , metal , chemical engineering , chemistry , organic chemistry , adsorption , engineering , metallurgy , composite material
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.