Due to their high binding affinity for noble metals, amines and thiols have frequently been used as ligands for surface modification. However, there are many challenges for using these functional groups as linkers, ranging from the synthesis to instability once applied to the surface. Recently, N-heterocyclic carbenes (NHCs) have come to the fore as an improved ligand for surfaces modifications due to their enhanced chemical stability. To date, the NHC ligands used to functionalize noble metal surfaces are simple benzimidazoliums and imidazoliums. One method to broaden the scope of NHCs on noble metal surfaces is to employ non-standard NHCs, such as the saturated imidazolium, imidazolinium, and a six membered ring variant, perimidinium. These non-standard carbenes have the potential for even greater stability on the surfaces than typical NHC ligands. Furthermore, these non-standard NHCs can be more effective for analyte binding due to their different geometries at the surface. We will present the initial results for functionalization of gold surfaces with non-standard NHCs ligands as well as their verification and characterization using Surface-enhanced Raman Spectroscopy (SERS).<br/>

Using non-standard N-heterocyclic carbenes to functionalize gold surfaces and analysis of their binding via SERS

2019 Fall National Meeting

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