Post-Synthetic Decoupling of On-Surface-Synthesized Covalent Nanostructures from Ag(111)
2016 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 27, 7650-7654 p.Article in journal (Refereed) Published
The on-surface synthesis of covalent organic nanosheets driven by reactive metal surfaces leads to strongly adsorbed organic nanostructures, which conceals their intrinsic properties. Hence, reducing the electronic coupling between the organic networks and commonly used metal surfaces is an important step towards characterization of the true material. We demonstrate that post-synthetic exposure to iodine vapor leads to the intercalation of an iodine monolayer between covalent polyphenylene networks and Ag(111) surfaces. The experimentally observed changes from surface-bound to detached nanosheets are reproduced by DFT simulations. These findings suggest that the intercalation of iodine provides a material that shows geometric and electronic properties substantially closer to those of the freestanding network.
Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2016. Vol. 55, no 27, 7650-7654 p.
covalent networks; decoupling; surface chemistry; scanning probe microscopy; X-ray absorption spectroscopy
IdentifiersURN: urn:nbn:se:liu:diva-131915DOI: 10.1002/anie.201600684ISI: 000383252900006PubMedID: 27125328OAI: oai:DiVA.org:liu-131915DiVA: diva2:1034838
Funding Agencies|DFG [LA1842/4-1]; Nanosystems Initiative Munich; Helmholtz-Zentrum Berlin2016-10-132016-10-112016-10-13