Two –COOH Decorated Anionic Metal‐organic Frameworks with Open Cu²⁺ Sites Afforded Highly C₂H₂/CO₂ and C₂H₂/CH₄ Separation and Removal of Organic Dyes

Abstract

An anionic multifunctional porous metal organic framework (MOF), [Cu 2 THBA(H 2 O) 2 ] · (C 3 H 7 NO) 12 · (H 2 O) 10 ( 1 ) (H 4 THBA = p ‐terphenyl‐3,2′′,3′′,5,5′′,5′′′‐ hexcarboxylic acid) with NbO‐type topology was synthesized and characterized. Due to multiple functional sites and suitable pore size, the desolvated compound 1a exhibits high separation selectivity for C 2 H 2 /CO 2 of 30 and C 2 H 2 /CH 4 of 131 at 1 kPa at room temperature. Compound 1 can also efficiently and completely separate methylene blue (MB + ) molecules of low concentrations from aqueous solution in 12 h.