Experimental and theoretical studies on carbon surface modification by reduction of in situ generated diazonium salt

► Glassy carbon surface was grafted by in situ produced diazonium cation of (N, N-DMPDA). ► Cyclic voltammetry study using Fe(CN)63-/4- probe demonstrated the surface modification. ► DFT study confirmed electron injection into the monolayer through HOMO-LUMO gap analysis.