Metal-Organic Frameworks (MOFs) Composed of (Triptycenedicarboxylato)zinc

Two novel 2D and 3D coordination polymers of 9,10‐triptycenedicarboxylic acid and zinc nitrate, which form under solvothermal reaction conditions, are described. As determined by single‐crystal X‐ray structure analysis, their frameworks are assembled from dinuclear zinc coordination units which are interlinked by triptycenedicarboxylato (TDC) struts. In the 2D‐MOF reported here, the extended network of van der Waals interactions between triptycene units as well as coordinated solvent molecules is responsible for the dense assembly of layers with a 44 net topology into the final crystal structure. The framework of the 3D‐MOF is composed from [Zn2(TDC)1.5]∞ layers with a 63 topology, the layers being interlinked by triptycenedicarboxylato pillars (bnn‐net). This MOF possesses hexagonal channels which are filled with guest molecules.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) Two new 2D and 3D coordination polymers were formed together by treating 9,10‐triptycenedicarboxylic acid with zinc nitrate. The reaction conditions influenced the product ratios. The peculiarities of the compounds' structures elucidated by SXRD, e.g. related to the ability of triptycene to locate guest species between benzene rings, are discussed.