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Zhang XN, Chen BC, Zhang JL, Zhang JL, Liu SJ, Wen HR. Anionic lanthanide metal-organic frameworks with magnetic, fluorescence, and proton conductivity properties and selective adsorption of a cationic dye. Dalton Trans 2022; 51:15762-15770. [PMID: 36178291 DOI: 10.1039/d2dt02347d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel microporous anionic lanthanide metal-organic frameworks (Ln-MOFs), namely {[(CH3)2NH2][Ln(bptc)]·2H2O}n (Ln = Gd (1) and Dy (2), H4bptc = biphenyl-3,3',5,5'-tetracarboxylic acid) with a new 4,8-connected topology have been synthesized and structurally characterized. Ln-MOF 1 shows a significant magnetocaloric effect with -ΔSmaxm = 26.37 J kg-1 K-1 at 2 K for ΔH = 7 T, and a high proton conductivity of 1.02 × 10-4 S cm-1 at 323 K and 90% RH. Moreover, Ln-MOF 1 shows specific selective adsorption of the cationic dye Rhodamine B. Ln-MOF 2 exhibits field-induced slow magnetic relaxation with an energy barrier (Ueff) of 48.19 K, characteristic emission of Dy3+, and selective adsorption of Rhodamine B. Therefore, 2 is a multifunctional Ln-MOF with magnetic, fluorescence and selective adsorption properties.
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Affiliation(s)
- Xiao-Nuan Zhang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Bo-Chen Chen
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Jia-Li Zhang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Jia-Lin Zhang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Sui-Jun Liu
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - He-Rui Wen
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
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Ding RD, Li DD, Leng F, Yu JH, Jia MJ, Xu JQ. A metal-organic framework with rich accessible nitrogen sites for rapid dye adsorption and highly efficient dehydrogenation of formic acid. Dalton Trans 2022; 51:8695-8704. [PMID: 35611578 DOI: 10.1039/d2dt00389a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
MOFs with adequate free nitrogen sites have potential applications in dye adsorption and formic acid dehydrogenation. Here, we successfully synthesized a novel 3-D MOF 1 ([(CH3)2NH2][Cd(L)DMA]·0.5DMA·1.5H2O) with a special two-fold interpenetrating framework through a simple solvothermal reaction between CdCl2·1.5H2O and a nitrogen-rich triangular tricarboxylate-based linker (H3L, 4,4',4''-s-triazine-2,4,6-tribenzoic acid). After removing the guest molecules of dimethylacetamide (DMA) and H2O, including the coordinated DMA from 1 by vacuum activation at 423 K, a compound named 1' with a formula of [(CH3)2NH2][Cd(L)] and a similar interpenetrating framework structure was obtained. In comparison with compound 1, the total void volume of 1' is nearly doubled, and thus may provide higher potential for the adsorption of other guest molecules. Notably, the pyridine N atoms located in the middle of the triangular tricarboxylate-based linker are not involved in the coordination with Cd2+, and are all uniformly dispersed throughout the whole framework of the 3-D MOFs. Due to its unique structural features, the 3-D MOF 1' could effectively adsorb the cationic dye MB+ for recycling purposes. The rapid adsorption rate (0.7 × 10-2 g mg-1 min-1) and the relatively high capacity (900 mg g-1) for MB+ demonstrate the potential of 1' in dye adsorption. In addition, 1' may also be used as an effective support to immobilize PdAu NPs via the double-solvent method. The resultant catalyst Pd0.8Au0.2/1' exhibits decent catalytic activity for the dehydrogenation of formic acid with a TOF value of 1854 h-1 at 333 K. The existence of a large void volume and accessible pyridine N atoms provide a suitable environment for achieving a high dispersion of PdAu NPs, thereby leading to the formation of a catalytically active and stable supported noble-metal NP catalyst for H2 generation from formic acid decomposition.
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Affiliation(s)
- Run-Dong Ding
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China. .,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Dan-Dan Li
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China. .,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Feng Leng
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China. .,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Jie-Hui Yu
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China. .,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Ming-Jun Jia
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China.
| | - Ji-Qing Xu
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China. .,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin, 130012, China
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Alguacil FJ, López FA. Organic Dyes versus Adsorption Processing. Molecules 2021; 26:5440. [PMID: 34576914 PMCID: PMC8469008 DOI: 10.3390/molecules26185440] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/16/2022] Open
Abstract
Even in the first quarter of the XXI century, the presence of organic dyes in wastewaters was a normal occurrence in a series of countries. As these compounds are toxic, their removal from these waters is a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of the 2021 year) regarding the use of a variety of adsorbents in the removal of a variety of organic dyes of different natures.
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Affiliation(s)
| | - Félix A. López
- National Center for Metallurgical Researcher (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, Spain;
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