ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
2/2
HON Paper.pdf (610.38 kB)

Monolayer Nanosheets Formed by Liquid Exfoliation of Charge-as-Sisted Hydrogen-Bonded Frameworks

preprint
submitted on 02.12.2020, 22:50 and posted on 03.12.2020, 11:18 by Josh Nicks, Stephanie Boer, Nicholas White, jonathan Foster
Hydrogen-bonded organic frameworks (HOFs) are a diverse and tunable class of materials, but their potential as free-standing two-dimensional nanomaterials has yet to be explored. Here we report the self-assembly of two layered hydrogen-bonded frameworks based on strong, charge-assisted hydrogen-bonding between carboxylate and amidinium groups. Ultrasound-assisted liquid exfoliation of both materials readily produces monolayer hydrogen-bonded organic nanosheets (HONs) with micron-sized lateral dimensions. The HONs show remarkable stability and maintain their extended crystallinity and monolayer structures even after being suspended in water at 80 °C for three days. These systems also exhibit efficient fluorescence quenching of an organic dye in organic solvents, superior to the quenching ability of the bulk frameworks. We anticipate that this approach will provide a route towards a diverse new family of molecular two-dimensional materials with great potential for use in separation, sensing, catalysis, delivery, and electronics materials applications.

Funding

Australian Research Council (DE170100200).

History

Email Address of Submitting Author

jona.foster@sheffield.ac.uk

Institution

University of Sheffield

Country

UK

ORCID For Submitting Author

0000-0002-0588-2474

Declaration of Conflict of Interest

No conflict of interest to declare

Version Notes

Pre-submission

Exports