Enabling Solution Processable COFs through Suppression of Precipitation during Solvothermal Synthesis

Simple item page
dc.citation.firstpage20964en_US
dc.citation.issueNumber12en_US
dc.citation.journalTitleACS Nanoen_US
dc.citation.lastpage20974en_US
dc.citation.volumeNumber16en_US
dc.contributor.authorKhalil, Safiyaen_US
dc.contributor.authorMeyer, Matthew D.en_US
dc.contributor.authorAlazmi, Abdullahen_US
dc.contributor.authorSamani, Mohammad H. K.en_US
dc.contributor.authorHuang, Po-Chunen_US
dc.contributor.authorBarnes, Morganen_US
dc.contributor.authorMarciel, Amanda B.en_US
dc.contributor.authorVerduzco, Rafaelen_US
dc.contributor.orgNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatmenten_US
dc.date.accessioned2023-02-16T20:32:55Zen_US
dc.date.available2023-02-16T20:32:55Zen_US
dc.date.issued2022en_US
dc.description.abstractCovalent organic frameworks (COFs) are crystalline, nanoporous materials of interest for various applications, but current COF synthetic routes lead to insoluble aggregates which precludes processing for practical implementation. Here, we report a COF synthesis method that produces a stable, homogeneous suspension of crystalline COF nanoparticles that enables the preparation of COF monoliths, membranes, and films using conventional solution-processing techniques. Our approach involves the use of a polar solvent, diacid catalyst, and slow reagent mixing procedure at elevated temperatures which altogether enable access to crystalline COF nanoparticle suspension that does not aggregate or precipitate when kept at elevated temperatures. On cooling, the suspension undergoes a thermoreversible gelation transition to produce crystalline and highly porous COF materials. We further show that the modified synthesis approach is compatible with various COF chemistries, including both large- and small-pore imine COFs, hydrazone-linked COFs, and COFs with rhombic and hexagonal topologies, and in each case, we demonstrate that the final product has excellent crystallinity and porosity. The final materials contain both micro- and macropores, and the total porosity can be tuned through variation of sample annealing. Dynamic light scattering measurements reveal the presence of COF nanoparticles that grow with time at room temperature, transitioning from a homogeneous suspension to a gel. Finally, we prepare imine COF membranes and measure their rejection of polyethylene glycol (PEG) polymers and oligomers, and these measurements exhibit size-dependent rejection and adsorption of PEG solutes. This work demonstrates a versatile processing strategy to create crystalline and porous COF materials using solution-processing techniques and will greatly advance the development of COFs for various applications.en_US
dc.identifier.citationKhalil, Safiya, Meyer, Matthew D., Alazmi, Abdullah, et al.. "Enabling Solution Processable COFs through Suppression of Precipitation during Solvothermal Synthesis." <i>ACS Nano,</i> 16, no. 12 (2022) American Chemical Society: 20964-20974. https://doi.org/10.1021/acsnano.2c08580.en_US
dc.identifier.doihttps://doi.org/10.1021/acsnano.2c08580en_US
dc.identifier.urihttps://hdl.handle.net/1911/114456en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's post-print. The published article is copyrighted by the American Chemical Society.en_US
dc.titleEnabling Solution Processable COFs through Suppression of Precipitation during Solvothermal Synthesisen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Nov-2-2022-No-Highlights.pdf
Size:
1.18 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Chemical and Biomolecular Engineering Publications
Materials Science and NanoEngineering Publications