As an alternative synthesis procedure to obtain SU-112, MPDA was replaced by DABCO. 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), 1,4-diazabicyclo[2.2.2]octane (DABCO, 1.0 g) and then acetic acid (1.0 mL) in a borosilicate 3.3 glass tube (Duran 12 × 100 mm, DWK Life Sciences). The glass tube was t hen 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 filtered and washed with 50 mL of deionized wat er. The remaining brown solid was then dried overnight at 80 °C. This procedure with DABCO formed phase pure SU-112 which was used for characterization.