These are preliminary reports that have not been peer-reviewed.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.
Electrochemical Deposition of Addressable N-Heterocyclic Carbene Monolayers
preprintsubmitted on 06.01.2020, 11:19 and posted on 07.01.2020, 08:59 by Einav Amit, Shahar Dery, Suhong Kim, Anirban Roy, Qichi Hu, F. Dean Toste, Elad Gross
Herein, we introduce an electrochemical based approach for surface-anchoring of N-heterocyclic carbene (NHC) monolayers. The deposition process is based on in-situ formation of hydroxide ions by water reduction under negative potential. The hydroxide ions function as a base for deprotonation of the imidazole cations for the formation of active carbenes that self-assemble on the electrode's surface. Therefore, the electrochemical deposition does not require dry conditions or the addition of external base for carbene activation. The high temporal and spatial proximity between the NHC's activation and surface anchoring enabled the formation of well-ordered monolayers of NHCs on Au surfaces with higher density and stability than those achieved using liquid-phase deposition.