A Cationic Silver Pyrazine Coordination Polymer with High Capacity Anion Uptake from Water
| Autor: | Scott R. J. Oliver, Eaindar Soe, Beatriz Ehlke |
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| Rok vydání: | 2019 |
| Předmět: |
Anions
Silver Perrhenate Ion exchange Pyrazine Polymers Coordination polymer Inorganic chemistry Permanganate Cationic polymerization Water Portable water purification General Chemistry 010501 environmental sciences 01 natural sciences chemistry.chemical_compound chemistry Pyrazines Environmental Chemistry Carboxylate 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science & Technology. 53:7663-7672 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.9b01633 |
| Popis: | We report the first example of linker modification for an N-donor Ag-based cationic material while maintaining and in some cases increasing the anion exchange capacity. Cationic silver(I) pyrazine nitrate selectively traps harmful oxo-anions from water such as permanganate, perrhenate and a variety of α,ω-alkanedicarboxylates. We chose these anions as initial examples of exchange for potential water purification. The host-guest interaction between the cationic layers of π-stacked silver pyrazine polymers and the incoming/outgoing interlamellar anions allows for the exchange. The exchange capacity over 24 h reached 435 and 818 mg/g for permanganate and perrhenate, respectively, a record for a crystalline metal-organic material and over five times the exchange capacity compared to commercial resin. The material also undergoes organic exchange as an analog for pharmaceutical waste, some of which have a carboxylate functionality at the neutral pH range typical of natural water sources. Both the as-synthesized and exchanged materials are characterized by a variety of analytical techniques. |
| Databáze: | OpenAIRE |
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