To an oven dried Schlenk flask equipped with a stir bar 5-(1H-imidazol-1-yl)indolo[3,2,1-jk]carbazole (365.0 mg, 1.18 mmol, 1 equiv.) was added and degassed by three vacuum/nitrogen cycles. Dry acetonitrile (50 mL) and iodomethane (0.22 mL, 3.56 mmol, 3.0 equiv.) were added and the mixture was allowed to stir at room temperature for 48 hours. After this time, NaOH solution (2 M, ~1 mL) was added to quench any unreacted iodomethane. The mixture was then concentrated under reduced pressure. The residue was dissolved in EtOH (15 mL) and added dropwise to diethyl ether (200 mL), while stirring. The resultant precipitate was filtered, washed with diethyl ether (10 mL), and dried under vacuum to afford the product as an off-white solid (0.48 g) Yield: 90%.