An anionic Zn-MOF composed of 1D columnar SBUs for highly C₂H₂/CH₄ selective adsorption, dye adsorption and fluorescence sensing

Abstract

An anionic three-dimensional framework {(Me2NH2)2[Zn8(L)6(ad)4(μ4-O)]·10DMF·11H2O}(Zn-MOF, L2-=4,4'-(3-aminopyridine-2,5-diyl)dibenzoic acid, ad-=adeninate) with a column-layered structure was synthesized. Structural studies show that the Zn-MOF has octahedral cages [Zn8(ad)4(μ4-O)], adjacent cages are connected by O...

Two In-MOFs with gas adsorption and separation capability based on different pyridinyl carboxylate linkers

“…The C 2 H 2 and CO 2 uptake amounts of In-MOF 2 exceeded those of some other In-MOFs at 273 K and 298 K, such as [Me 2 NH 2 ][In(L)]·2.5NMF·4H 2 O (85/59 cm 3 g −1 , 65/30 cm 3 g −1 ) 12 SNNU-150-In (50/35 cm 3 g −1 and 40.2/23 cm 3 g −1 ), 19 BUT-70A (93.8/69.5 cm 3 g −1 and 37.9/19.3 cm 3 g −1 ) 20 and Zn-MOF (98.61/59.79 cm 3 g −1 and 54.27/33.10 cm 3 g −1 ). 21 It is worth noting that the pore size distributions showed that the pore size of In-MOF 2 is mainly distributed at 5.89 Å, which is less than 6.79 Å of In-MOF 1 . In-MOF 2 displayed larger C 2 H 2 and CO 2 uptakes than In-MOF 1 , despite the narrower pore size.…”

Stable Two-Fold Interpenetrated Cd(II)-MOF for Selective Dye Adsorption and Luminescence Detection of Hydroxyl-Substituted Nitroaromatic Compounds

“…Moreover, the treatment of wastewater containing various pollutants, which threaten the aquatic environment and life quality, has been of great interest with increasing industrialization. − Among the pollutants, dyes are one of the most prevalent pollutants in wastewater due to their wide employment in diverse industries such as textile, food, leather, cosmetics, printing, paper, etc. − Hence, the removal of dye pollution before being discharged into the environment has gained increased attention due to its toxicity, stability, and reduction in the oxygen content in aquatic media. − So far, for this purpose, several methods, e.g., adsorption, degradation, oxidative decomposition, and coagulation, have been applied. − Among the methods, adsorption is considered one of the simple, convenient, and effective wastewater treatment methods to remove dyestuff from aquatic media . Several conventional adsorbents have been used for the remediation of dyestuff. − However, due to their poor selectivity and weak adsorption capacity, recently, MOFs have attracted attention as adsorbents for dye removal due to their tunable properties and high adsorption capacity. ,− MOFs with anionic or cationic skeletons (with charged surfaces) can separate the dye from the dye mixture (selective adsorption) via electrostatic interactions. , In addition, adsorption capacity and selective adsorption can be enhanced with hydrogen bonding or π···π interactions between MOFs and dye molecules …”

Highly selective C2H2and CO2capture based on two new ZnII-MOFs and fluorescence sensing of two doped MOFs with EuIII

“…[5][6][7][8][9][10][11][12][13][14][15][16] As we all know, the structure of MOFs mainly depends on the selection and design of ligands. Pyridine in ligands can change the flexibility of the skeleton, 17,18 and the coordinated N atom in the structure can affect the gas adsorption of MOFs. 19 Therefore, the combination of pyridines and nitrogen-containing organic small molecule ligands makes the synthesized MOFs more diversified in structure and more stable in performance.…”