Analysis of 2-Benzo[c]cinnoline Nanofilm at the Gold Surface

A polycrystalline gold surface was modified with 2-benzo[c]cinnoline (BCC) in nonaqueous media using cyclic voltammetry. A multilayer BCC nanofilm at the gold surface was formed by the electrochemical reduction of 2-benzo[c]cinnoline diazonium salt (BCC-DAS). Grafting of BCC molecules onto the gold surface was verified by cyclic voltammetry using various redox probes, electrochemical impedance spectroscopy, and Raman spectroscopy. The BCC film thickness was measured by ellipsometry and calculated as 46nm indicating a multilayer film formation. The stability and the potential range of the novel Au-BCC modified electrode were also studied in open atmosphere and pure water. The working potential range of Au-BCC electrode was found to be between -1.8 and +1.6V.