High capacity for selective adsorption of anionic pollutants by a silver(I) 3D cationic supramolecular constructed from a flexible dithione ligand

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

“…The dithione ligands are capable to generate coordination networks with coinage metal salts such as silver­(I) and gold­(I), but also with other metal ions, such as cadmium­(II) and mercury­(II), which have demonstrated the ability to capture organic pollutants, inorganic toxins, including iodine and heavy metals. − In these cases, the counteranion can be halides, pseudohalides, trifluoroacetate, perchlorate, dichromate, nitrate, or a mixture of these anions. Recently, the R­(CS)–(CH 2 ) m –(SC)­R ligands ( m = 2, 5) has been used to construct various coordination networks, which demonstrated the capacity to selectively capture and separate gases. , The general conclusion resulting from these investigations, and therefore the intrinsic characteristics of these coordination networks, are inherently a function of the metal ion and its corresponding counteranion, as well as the number of methylene groups within the chain, m. However, the list of coordination networks investigated so far appears to be rather heterogeneous comparative to the rather rich thioether counter-parts. , This paucity precludes reliably establishing structure–property trends, and thus the reasons rationalizing the experimental outcomes.…”