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

We report a new microporous negatively charged metal-organic framework (MOF), [(C2H5)(2)NH2](2)[Mn-6(L)(OH)(2)(H2O)(6)]center dot 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 re[ease 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.