Stability and Porosity Enhancement through Concurrent Ligand Extension and Secondary Building Unit Stabilization Daofeng Sun Yanxiong Ke Tracy M. Mattox Sean Parkin Hong-Cai Zhou 10.1021/ic0609002.s001 https://acs.figshare.com/articles/journal_contribution/Stability_and_Porosity_Enhancement_through_Concurrent_Ligand_Extension_and_Secondary_Building_Unit_Stabilization/3058885 A trigonal nanosized carboxylate ligand, 1,3,5-tris[4‘-carboxy(1,1‘-biphenyl-4-yl)]benzene (TCBPB), has been synthesized and applied in the construction of porous metal−organic frameworks (MOFs). A solvothermal reaction of TCBPB and a zinc salt in the presence of pyridine produces <b>1</b>, an unstable MOF consisting of a tetrazinc secondary building unit (SBU) with labile terminal ligands. Changing pyridine to a noncoordinating base in the assembly procedure affords <b>2</b>, a stable MOF with permanent porosity containing an octazinc SBU without labile terminal ligands. 2006-09-18 00:00:00 TCBPB Concurrent Ligand Extension Secondary Building Unit StabilizationA terminal ligands pyridine nanosized carboxylate ligand SBU MOF