Fig. 1: Methodologies for preparation of NHCs-based SAMs.
From: Electrochemical deposition of N-heterocyclic carbene monolayers on metal surfaces
a NHC-based SAMs formation is mainly facilitated by deprotonation of imidazolium salt precursors with inorganic base or by using specifically synthesized precursors such as NHC(H)[HCO3] salts or NHC–CO2 adducts. b In this work an alternative approach is demonstrated in which SAMs of NHCs are prepared on metal surfaces (Au, Pt, Pd, and Ag) by electrochemically induced deprotonation of 1,3-bis(2,4-dinitrophenyl)-imidazolium bromide and 1,3-dimethyl-benzimidazolium iodide salt precursors.
