Synthesis, crystal structures and gas adsorption of two porous pillar-layered MOFs decorated with different functional groups

•Zn-1,2,4-triazolate-dicarboxylates MOFs•Porous pillar-layered framework•Remarkable H2 and CO2 gas adsorption performance•tuneable CO2/CH4 selectivity

Take advantage of the readily accessible layered Zn-1,2,4-triazolate motif and two isometric dicarboxylate ligands with different functional groups (trans,trans-1,3-butadiene-1,4-dicarboxylic acid, TTBDC and 2,5-dihydroxyterephthalic acid, DOBDC), we report herein two porous Zn-triazolate-dicarboxylate pillar-layered MOFs. Flexible TTBDC led to the formation of MOF 1 crystallizing in Pna21 space group, but rigid DOBDC produced MOF 2 in P4/ncc space group. Both pillar-layered MOFs show not only remarkable H2 and CO2 uptake capacity, but also high CO2 over CH4 selectivity.

Graphical AbstractTwo microporous Zn-triazolate-dicarboxylate pillar-layered MOFs decorated with different functional groups exhibit not only remarkable H2 and CO2 uptake performance but also high CO2/CH4 selectivity.Figure optionsDownload full-size imageDownload as PowerPoint slide