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• W2771492727 abstract "Abstract 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(NO 3 ) 2 ·6H 2 O 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, [Zn 2 (3,3′-PDBA) 2 (DABCO) 1.5 ]·2DMF·H 2 O, 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 of the 3,3′-PDBA bridging ligand were fully exposed toward the 1D channels. Therefore, the 1D channels represented a highly nitrogen-rich environment. Gas sorption analysis indicated that the Zn-MOF was selective for adsorption of CO 2 at 196 K over N 2 (77 K) and H 2 (77 K). The exceptionally high zero surface coverage heat of CO 2 adsorption ( Q st = 79.5 kJ mol −1 ) was attributable to the openly accessible multiple Lewis basic sites in the nitrogen-rich 1D channels. Zn-MOF also showed good Lewis base catalytic activities in three model aldol-type reactions with good recyclability due to chemically accessible 3° amine sites." @default.
• W2771492727 created "2017-12-22" @default.
• W2771492727 creator A5021787719 @default.
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• W2771492727 date "2017-12-07" @default.
• W2771492727 modified "2023-10-16" @default.
• W2771492727 title "Selective carbon dioxide sorption and heterogeneous catalysis by a new 3D Zn-MOF with nitrogen-rich 1D channels" @default.
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• W2771492727 doi "https://doi.org/10.1038/s41598-017-17584-8" @default.
• W2771492727 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5719397" @default.
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• W2771492727 hasPublicationYear "2017" @default.
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