Surface areas were measured by nitrogen sorption at 77.3 K. Powder samples were degassed offline at 120 °C for 15 h, followed by degassing on the analysis port under vacuum, also at 100 °C. Isotherm measurements were performed using a Micromeritics 3flex surface characterization analyzer, equipped with a Cold-Edge technologies liquid helium cryostat chiller unit for temperature control. For TBAP-α, BET surface areas were calculated over the relative pressure range 0.02 -0.06. For TFPhP, the BET surface area was calculated over the relative pressure range 0.05 -0.25.