1,3,5-Tris(4-carboxyphenyl)benzene assembles into an intricate 8-fold polycatenated assembly of (6,3) hexagonal nets formed through hydrogen bonds and π-stacking. One polymorph features 56 independent molecules in the asymmetric unit, the largest Z′ reported to date. The framework is permanently porous, with a BET surface area of 1095 m2 g−1 and readily adsorbs N2, H2 and CO2.
Zentner, Cassandra A.; Lai, Holden W.H.; Greenfield, Joshua T.; Wiscons, Ren A.; Zeller, Matthias; Campana, Charles F.; Talu, Orhan; FitzGerald, Stephen A.; and Rowsell, Jesse L.C., "High Surface Area and Z′ in a Thermally Stable 8-fold Polycatenated Hydrogen-bonded Framework" (2015). Chemical & Biomedical Engineering Faculty Publications. 147.
The authors acknowledge the support of the NSF (DMR-0922588) for the purchase of the powder X-ray diffractometer at Oberlin College. The X-ray diffractometers at Youngstown State University were funded by the NSF (CHE 0087210, DMR 1337296) and the Ohio Board of Regents (CAP-491).