Construction of novel cluster-based MOF as multifunctional platform for CO2 catalytic transformation and dye selective adsorption

Synthetic conditions and ligands are the key structural defining factors of metal-organic frameworks (MOFs). Therefore, reasonable optimization of these aspects is considered to be an effective means for de-signing materials with novel structures and target functions. Herein, two novel Co(II)-based MOFs, namely [Co(HL)(dibp)]n ( HL-8 ) and {[Co2(L)(OH)(dibp)] center dot DMA}n ( HL-9 ) (H3L = 2',6'-dimethyl-[1,1'-biphenyl]-3,4',5-tricarboxylic acid; dibp = 4,4'-di(1H-imidazol-1-yl)-1,1'-biphenyl]), have been hydrothermally synthesized and structurally characterized. HL-8 crystallizes in the orthorhombic system (Pna21) with a grid layer structure, while HL-9 crystallizes in the monoclinic P21/n space group assembled through Co4(OH)2 clus-ters with organic ligands. Remarkably, benefiting from the finite cage-like structure, HL-9 exhibited en-hanced performance in carbon dioxide (CO2) adsorption/catalytic transformation and excellent size selec-tivity during dye molecular adsorption process. (c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.