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Transoid-to-Cisoid Conformation Changes of Single Molecules on Surfaces Triggered by Metal Coordination

Freund, Sara and Pawlak, Rémy and Moser, Lucas and Hinaut, Antoine and Steiner, Roland and Marinakis, Nathalie and Constable, Edwin C. and Meyer, Ernst and Housecroft, Catherine E. and Glatzel, Thilo. (2018) Transoid-to-Cisoid Conformation Changes of Single Molecules on Surfaces Triggered by Metal Coordination. ACS Omega, 3. pp. 12851-12856.

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Abstract

Conformational isomers are stereoisomers that can interconvert over low potential barriers by rotation around a single bond. However, such bond rotation is hampered by geometrical constraints when molecules are adsorbed on surfaces. Here we show that the adsorption of 4,40-bis(4-carboxyphenyl)-6,60-dimethyl-2,20-bipyridine molecules on surfaces leads to the appearance of pro-chiral single-molecules on NiO(001) and to enantiopure supramolecular domains on Au(111) surfaces containing the transoid molecule conformation. Upon additional Fe adatom deposition, molecules undergo a controlled interconversion from a transoid to cisoid conformation as a result of coordination of the Fe atoms to the 2,20-bipyridine moieties. As confirmed by atomic force microscopy 1 images and X-ray photoelectron spectroscopy measurements, the resulting molecular structures become irreversibly achiral.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Freund, Sara and Pawlak, Rémy and Hinaut, Antoine and Meyer, Ernst and Glatzel, Thilo and Marinakis, Nathalie and Moser, Lucas and Steiner, Roland
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:19 Oct 2018 11:53
Deposited On:19 Oct 2018 11:53

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