biostudies-literatureUnknown7(1)Kim HCWe prepared a new C 2h-symmetric bridging ligand, 3,3'-(pyrazine-2,5-diyl)dibenzoic acid (3,3'-PDBA), through a Suzuki coupling reaction. 3,3'-PDBA contains a central pyrazine ring instead of the phenyl ring of 3,3'-terphenyldicarboxylic acid (3,3'-TPDC). Despite the geometrical similarity of the two bridging ligands, the reaction between Zn(NO3)2·6H2O and 3,3'-PDBA in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) yielded a structurally different Zn-based metal-organic framework (Zn-MOF). The Zn-MOF, [Zn2(3,3'-PDBA)2(DABCO)1.5]·2DMF·H2O, had two-dimensional (2D) layers, and the interlocked 2D layers formed a porous 3D framework. Interestingly, one of the two available N atoms of DABCO remained intact. The uncoordinated N atoms of the dangling DABCO ligand and the pyrazinyl N atoms Scientific reports17185https://www.ebi.ac.uk/biostudies/studies/S-EPMC5719397biostudies-literatureSelective carbon dioxide sorption and heterogeneous catalysis by a new 3D Zn-MOF with nitrogen-rich 1D channels.PMC5719397Huh SKim HCKim YKim SJfalseSelective carbon dioxide sorption and heterogeneous catalysis by a new 3D Zn-MOF with nitrogen-rich 1D channels.We prepared a new C 2h-symmetric bridging ligand, 3,3'-(pyrazine-2,5-diyl)dibenzoic acid (3,3'-PDBA), through a Suzuki coupling reaction. 3,3'-PDBA contains a central pyrazine ring instead of the phenyl ring of 3,3'-terphenyldicarboxylic acid (3,3'-TPDC). Despite the geometrical similarity of the two bridging ligands, the reaction between Zn(NO3)2·6H2O and 3,3'-PDBA in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) yielded a structurally different Zn-based metal-organic framework (Zn-MOF). The Zn-MOF, [Zn2(3,3'-PDBA)2(DABCO)1.5]·2DMF·H2O, had two-dimensional (2D) layers, and the interlocked 2D layers formed a porous 3D framework. Interestingly, one of the two available N atoms of DABCO remained intact. The uncoordinated N atoms of the dangling DABCO ligand and the pyrazinyl N atoms 2017-01-01T00:00:00Z2017 Dec2025-04-05T10:35:36.862Z2019-03-27T03:04:07ZS-EPMC57193972921505310.1038/s41598-017-17584-8