A copper()-based porous metal-organic framework for the efficient and rapid capture of toxic oxo-anion pollutants from water

• Published in: Dalton transactions : an international journal of inorganic chemistry 2021-03, Vol.5 (11), p.3832-384
• Main Authors: Li, Yang, Yang, Jin, Ma, Jian-Fang
• Format: Article
• Language: English
• Subjects: Anions; Aqueous solutions; Copper compounds; Crystallography; Dimethyl acetamide; Hazardous wastes; Ions; Metal-organic frameworks; Pollutants; Waste disposal
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d0dt04252h

The efficient and selective capture of toxic oxo-anions is highly desirable for environmental retrieval and hazardous waste disposal. This has remained an important task and gained considerable scientific attention due to their harmful effects on the ecosystem and human health. Herein, a porous cationic metal-organic framework (MOF), namely, [Cu 3 Cl(L)(H 2 O) 2 ]·Cl·4DMA·8H 2 O ( 1 ), was synthesized (H 4 L = 1,4,8,11-tetrazacyclotetradecane- N , N ′, N ′′, N ′′′-tetramethylenecinnamic acid and DMA = N , N ′-dimethylacetamide). 1 shows high stability in aqueous solution and represents an extraordinary example that is capable of efficiently capturing environmentally toxic Cr 2 O 7 2− and MnO 4 − anions. Moreover, the removal of Cr 2 O 7 2− and MnO 4 − anions from water was also explored in the presence of other competing anions. A porous cationic metal-organic framework was rationally achieved with nanosized channels, and it exhibited the capability to efficiently capture environmentally toxic Cr 2 O 7 2− and MnO 4 − anions.