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Probing the chemical structure of monolayer covalent-organic frameworks grown via Schiff-base condensation reactions

Hu, Y; Goodeal, N; Chen, Y; Ganose, AM; Palgrave, RG; Bronstein, H; Blunt, MO; (2016) Probing the chemical structure of monolayer covalent-organic frameworks grown via Schiff-base condensation reactions. CHEMICAL COMMUNICATIONS , 52 (64) pp. 9941-9944. 10.1039/c6cc03895f. Green open access

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Abstract

Two-dimensional covalent-organic frameworks (2D-COFs) on surfaces offer a facile route to new 2D materials. Schiff-base condensation reactions have proven to be an effective fabrication route for such materials. We present scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) studies of porphyrin 2D-COFs grown at a solid–vapour interface. XPS shows that covalent links between porphyrins consist of a mixture of imines and hemiaminals, a non-conjugated intermediate in the Schiff-base condensation reaction. These results demonstrate that environmental conditions during growth can have an important impact on the chemical composition of Schiff-base 2D-COFs.

Type: Article
Title: Probing the chemical structure of monolayer covalent-organic frameworks grown via Schiff-base condensation reactions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c6cc03895f
Publisher version: http://dx.doi.org/10.1039/c6cc03895f
Language: English
Additional information: © Royal Society of Chemistry 2016
Keywords: Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, Chemistry, INTERFACE, PORPHYRIN
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1516898
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