On-Surface formation of Cyano-Vinylene Linked Chains by Knoevenagel Condensation

Chemistry. 2021 Oct 15. doi: 10.1002/chem.202103094. Online ahead of print.ABSTRACTThe rapid development of on-surface synthesis provides a unique approach toward the formation of carbon-based nanostructures with designed properties. Herein, we present the on-surface formation of CN-substituted phenylene vinylene chains on the Au(111) surface, thermally induced by annealing the substrate stepwise at temperatures between 220°C and 240°C. The reaction is investigated by scanning tunneling microscopy and density functional theory. Supported by the calculated reaction pathway, we assign the observed chain formation to a Knoevenagel condensation between an aldehyde and a methylene nitrile substituent.PMID:34652042 | DOI:10.1002/chem.202103094

Source: Chemistry - October 15, 2021 Category: Chemistry Authors: Francesca Moresco Kwan Ho Au-Yeung Tim K ühne Daniel Becker Marcus Richter Dmitry A Ryndyk Gianaurelio Cuniberti Thomas Heine Xinliang Feng Source Type: research