Selective Adsorption Of Water, Methanol, And Ethanol By Naphthalene Diimide-Based Coordination Polymers With Constructed Open Cu2+ Metal Sites And Separation Of Ethanol/Acetonitrile

The selective separation of ethanol/acetonitrile by porous materials has rarely been observed owing to their similar physicochemical properties. In this work, we report a new coordination network, [Cu-2(4-pmntd)(2)(opd)(2)](4-pmntd = N, N'-bis(4-pyridymethy) naphthalene diimide, opd = disodium 1,2-benzenedicarboxylate), which exhibits selective separation of ethanol over acetonitrile. The weak coordination bonds formed by unsaturated Cu2+ sites and hydroxyl groups are the key to such performance.