Journal
CHEMICAL SCIENCE
Volume 11, Issue 32, Pages 8433-8437Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0sc03318a
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Funding
- Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-FG02-08ER46519]
- National Science Foundation [ECCS-1542148]
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We report a general method for the synthesis of free-standing, self-assembled MOF monolayers (SAMMs) at an air-water interface using polymer-brush coated MOF nanoparticles. UiO-66, UiO-66-NH2, and MIL-88B-NH(2)were functionalized with a catechol-bound chain-transfer agent (CTA) to graft poly(methyl methacrylate) (PMMA) from the surface of the MOF using reversible addition-fragmentation chain transfer polymerization (RAFT). The polymer-coated MOFs were self-assembled at the air-water interface into monolayer films similar to 250 nm thick and capable of self-supporting at a total area of 40 mm(2). Mixed-particle films were prepared through the assembly of MOF mixtures, while multilayer films were achieved through sequential transfer of the monolayers to a glass slide substrate. This method offers a modular and generalizable route to fabricate thin-films with inherent porosity and sub-micron thickness composed of a variety of MOF particles and functionalities.
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