“…pores with diameters less than 20 Å) framework solids that might serve as heterogeneous catalysts. Since the early 1990s, [2,3,[20][21][22][23][24][25][26][27][28][29][30][31] much work has been done to develop porphyrin framework solids, with more recent contributions from Hupp, Paz, Huang, van der Voort, and others [4,11,19,32]. Many singlecrystal structures of porphyrinic solids contain pores filled with disordered solvates, but very few are stable to the removal of solvates.…”