A new porphyrin-based
microporous MOF, {Mn(II)<sub>0.5</sub>[Mn(II)<sub>4</sub>Cl(Mn(III)Cl-ttzpp)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>]}·(DEF)<sub>20</sub>·(CH<sub>3</sub>OH)<sub>18</sub>·(H<sub>2</sub>O)<sub>12</sub> (<b>UTSA-57</b>), has been constructed from {5,10,15,20-tetrakis[4-(2,3,4,5-tetrazolyl)phenyl]porphyrinato}
manganese(III) chloride as the metalloligand. The MOF adopts the rare
scu topology with one-dimensional square nanotube-like channels of
about 20 Å. <b>UTSA-57a</b> exhibits permanent porosity
and displays moderately high performance for C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> separation at room temperature
