A new microporous anionic metal–organic framework as a platform for highly selective adsorption and separation of organic dyes

Abstract

We report a new microporous negatively charged metal–organic framework (MOF), [(C₂H₅)₂NH₂]₂[Mn₆(L)(OH)₂(H₂O)₆]·4DEF (1) (H₁₂L = 5,5′,5′′,5′′′,5′′′′,5′′′′′-[1,2,3,4,5,6-phenylhexamethoxyl]hexaisophthalic acid and DEF = N,N′-diethylformamide), and its utilization as a platform for the highly selective adsorption and separation of organic dyes through an ion-exchange process. The dynamics of selective adsorption, separation and release of a series of organic dyes demonstrated that this exchange-based separation process is highly related to the sizes or charges of organic dyes, and this relationship can be controlled by the structural characteristics of MOF 1.