An Exceptionally Water Stable Metal–Organic Framework with Amide‐Functionalized Cages: Selective CO2/CH4 Uptake and Removal of Antibiotics and Dyes from Water

• Published in: Chemistry : a European journal Vol. 23; no. 53; pp. 13058 - 13066
• Main Authors: Jin, Wei‐Guang, Chen, Wei, Xu, Pei‐Hang, Lin, Xin‐Wen, Huang, Xiao‐Chun, Chen, Guang‐Hui, Lu, Fushen, Chen, Xiao‐Ming
• Format: Journal Article
• Language: English
• Published: WEINHEIM Wiley 21.09.2017; Wiley Subscription Services, Inc
• Subjects: Activated carbon; Adsorption; Antibiotics; Cages; Carbon dioxide; carboxylate ligands; Chemical bonds; Chemical synthesis; Chemistry; Chemistry, Multidisciplinary; Chromium; Color removal; Copper; Dyes; Fluoroquinolones; ligand design; Metal-organic frameworks; Methane; Physical Sciences; Pollutants; Public health; Pyridines; Science & Technology; Selective adsorption; Thermal stability; Wastewater; Zinc; adsorption; CHINA; STABILITY; AQUATIC ENVIRONMENT; MOFS; metal-organic frameworks; CO2 CAPTURE; EMERGING CONTAMINANTS; carboxylate ligands; WASTE-WATER; ligand design; copper; FLUOROQUINOLONE ANTIBIOTICS; LIGAND
• DOI: 10.1002/chem.201701884
• ISSN: 0947-6539; 1521-3765

As the main organic pollutants in wastewater, antibiotics and organic dyes are harmful to the environment and public health, and their removal is important but challenging. In this work, highly porous 3D metal–organic frameworks (MOFs) [M2(PDAD)(H2O)]n (PCN‐124‐stu; M=Cu, Zn; H4PDAD = 5,5′‐(pyridine‐3,5‐dicarbonyl)bis(azanediyl)diisophthalic acid) were synthesized, and PCN‐124‐stu(Cu) shows excellent chemical and thermal stability. PCN‐124‐stu(Cu) was used as a host for efficient extraction of various organic dyes, especially the large‐molecule dye Coomassie brilliant blue, and fluoroquinolones from water, in comparison with five common MOFs, zeolite 13X, and activated carbon. PCN‐124‐stu(Cu) exhibits absolute predominance for fluoroquinolone adsorption among these microporous materials because of the H‐bonds between fluoroquinolone molecules and the amide groups in the frameworks, except for MIL‐100(Cr), which is a mesoporous MOF. Moreover, PCN‐124‐stu(Cu) could release fluoroquinolones slowly in physiological saline and retained its framework structure after four adsorption/desorption cycles. In addition, PCN‐124‐stu(Cu) can be used as a platform for selective adsorption of CO2/CH4. Waterproof MOF: An exceptionally water stable metal–organic framework (MOF) with amide‐functionalized cages (see figure), namely, PCN‐124‐stu(Cu), was synthesized, and its porous structure exhibits selective adsorption CO2/CH4. Furthermore, PCN‐124‐stu(Cu) can serve as a platform for removal of antibiotic and dye pollutants from water.