To obtain SU-107 the reagents were added in the following order; ZrOCl2•8H2O (32 mg, 0.1 mmol), ellagic acid (60 mg, 0.2 mmol), deionized water (2.5 mL), acetic acid (1.0 mL) and then 1,4-diazabicyclo[2.2.2]octane (DABCO, 1.0 g) in a borosilicate 3.3 glass tube (Duran 12 × 100 mm, DWK Life Sciences). The glass tube was then sealed with a PBT cap containing a PTFE seal and heated at 160 °C in an aluminium heating block for 1 h while stirring. After cooling the glass tube to room temperature, the resulting brown suspension was then centrifuged at 10,000 rpm for 10 minutes and decanted. The remaining brown solid was then dried overnight at 80 °C.