This compound was synthesised from a literature procedure. 1,9-Diaminoacridinone (100 mg, 0.44 mmol) was dissolved in dry DMF (14 mL) and stirred under nitrogen. Separately, phenyl isothiocyanate (1.05 mL, 8.8 mmol) was dissolved in dry DMF, and this was added dropwise to the first solution. This reaction was stirred for 3 h before the solvent was removed. The resultant solid was treated with 1:1 v/v diethyl ether/hexane (100 mL), sonicated for 20 min and filtered. The resultant solid was washed with portions of diethyl ether (3 x 20 mL) and methanol (3 x 20 mL) to leave a yellow solid. This was then dried in vacuo to yield the final compound (117 mg, 0.24 mmol, 54%). Analytical data matched that of this compound in the literature. Mp = 297-300 °C (decomposition) (3 mL). The reaction was left to stir for 15 min. Next, the solution was poured onto ice-cold deionised water (25 mL) and a precipitate formed, which was filtered. This precipitate was then washed with water (3 x 30 mL), hexane (3 x 15 mL), and suspended in diethyl ether (100 mL) before being sonicated for 30 min. The solid was again filtered, washed with another portion of diethyl ether then dried in vacuo (55 mg, 0.094 mmol, 42%). Mp = 137-140 °C 1 H NMR (500 MHz, DMSO-d6) δ ppm 10.63 (2 H, s), 10.17 Separately, 3,5-bis(trifluoromethyl)phenyl isothiocyanate (144.52 mg, 0.533 mmol) was dissolved in DMSO (2.5 mL), and this was added dropwise to the reaction mixture. The reaction was left to stir for 15 min. Next, the solution was poured onto ice-cold deionised water (25 mL), and a yellow/green precipitate formed, which was filtered. This precipitate was then washed with water (3 x 30 mL) and hexane (3 x 15 mL). Next, the solid suspended in a 1:9 v/v diethyl ether/hexane mixture and sonicated for 30 (15 mL). Thiophosgene (0.16 mL, 2.05 mmol) was added, followed by a layer of saturated aqueous NaHCO3 solution (20 mL) to trap any volatile thiophosgene. The mixture was stirred gently at room temperature for 12 h. Next, the aqueous layer was removed, and the organic layer dried with magnesium sulfate for 1 h. The solvent was removed in vacuo, and the resultant solid used immediately in the subsequent reaction. 1,9-Diaminoacridinone (50 mg, 0.25 mmol) and 4-(pentafluorosulfanyl)phenyl isothiocyanate (140 mg, 0.54 mmol) were dissolved in dry DMSO (2.5 mL) and stirred under N2. This reaction was stirred for 3 h before the solvent was poured into ice water. The resultant precipitate was filtered, then treated with 1:1 v/v diethyl ether/hexane (100 mL), sonicated for 20 min and filtered. The resultant solid was washed with portions of a 1:1 v/v diethyl ether/hexane mixture (3 x 20 mL) to leave a green/brown solid. The solid was then dried in vacuo to yield the final compound (61 mg, 0.08 mmol, 33% yield).