Synthesis and Characterization of Lanthanide Metal-Organic Frameworks with Perfluorinated Linkers

2016 ◽  
Vol 98 ◽  
pp. 70-74
Author(s):  
Andrius Laurikėnas ◽  
Jurgis Barkauskas ◽  
Aivaras Kareiva
Keyword(s):  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Lanthanide Elements ◽  
Diffusion Controlled ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal

In this study, lanthanide elements (Ln3+) and 2,3,5,6-tetrafluoro-1,4-benzenedicarboxylic acid (TFBDC) based metal-organic frameworks (MOFs) were synthesized by precipitation and diffusion-controlled precipitation methods. Powders insoluble in aqueous media and polar solvents were obtained. The microstructure and properties of Ln3+ MOFs were evaluated and discussed. X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and fluorescence spectroscopy (FLS) were carried out to characterize Ln3+ MOF's crystallinity, the microstructure, chemical composition and optical properties.

scholarly journals On the Synthesis and Characterization of Lanthanide Metal-Organic Frameworks

Ceramics ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 54-64 ◽  
Author(s):  
Andrius Laurikenas ◽  
Aldona Beganskiene ◽  
Aivaras Kareiva
Keyword(s):  
Metal Organic Frameworks ◽  
Xrd Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Nitrates ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Benzenetricarboxylic Acid

In this study, lanthanide metal-organic frameworks Ln(BTC)(DMF)2(H2O) (LnMOFs) are synthesized using the metal nitrates as lanthanide (Ln = La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu) source and 1,3,5-benzenetricarboxylic acid (BTC) as a coordination ligand. X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TG/DTG) analysis fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM) are employed to characterize the newly synthesized LnMOFs.

Syntheses of series of lanthanide metal−organic frameworks for efficient UV-light-driven dye degradation: experiment and simulation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Fei Yuan ◽  
Haixia Ma ◽  
Chumei Yuan ◽  
Chun-Sheng Zhou ◽  
Huai-Ming Hu ◽  
...  
Keyword(s):  
General Formula ◽  
Dye Degradation ◽  
Uv Light ◽  
Metal Organic Frameworks ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Experiment And Simulation

Three new Ln(III)-based metal-organic frameworks (MOFs), having general formula [Ln2(L)2(ox)(H2O)2]n (Ln = Nd (1), Sm (2) and Eu (3)) have been synthesized using multifunctional triazole-carboxylate linker 5-(1H-1,2,4-triazol-1-yl)-1,3-benzenedicarboxylic acid (H2L) and...

Two lanthanide metal–organic frameworks as sensitive luminescent sensors for the detection of Cr2+ and Cr2O72− in aqueous solutions

CrystEngComm ◽  
2018 ◽  
Vol 20 (2) ◽  
pp. 189-197 ◽  
Author(s):  
X. H. Huang ◽  
L. Shi ◽  
S. M. Ying ◽  
G. Y. Yan ◽  
L. H. Liu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Dicarboxylic Acid ◽  
Metal Organic Frameworks ◽  
Hydrothermal Conditions ◽  
Luminescent Sensors ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal

Two lanthanide–organic frameworks [Ln(HPIDC)(m-bdc)·1.5H2O]n (Ln = Eu 1 or Tb 2; H3PIDC = 2-(4-pyridyl)-1H-imidazole-4,5-dicarboxylic acid; m-H2bdc = 1,3-benzenedicarboxylic acid) were synthesized under hydrothermal conditions.

scholarly journals Luminescent, sorptive and antibacterial potential of bismuth-organic framework

2021 ◽  
Vol 35 (1) ◽  
pp. 119-128
Author(s):  
S. Iram ◽  
T. Khurshid ◽  
S. Latif ◽  
M. Imran ◽  
F. Kanwal ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Three Dimensional ◽  
Batch Adsorption ◽  
X Ray Diffraction ◽  
Bet Analysis ◽  
Metal Organic ◽  
Ft Ir ◽  
Organic Framework

Metal organic frameworks are formed by the three-dimensional linkage of metal cores and organic linkers. In this work, bismuth-based metal organic framework (Bi-MOF) has been synthesized by using 5-hydroxyisophthalic acid (H2HIA) as linker via hydrothermal method. The said MOF was structurally characterized by UV/Vis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), 1H NMR, energy dispersive spectroscopy (EDS), thermogravimetric analysis (TGA) and X-ray diffraction technique. This MOF showed highly porous structure with surface area 1096 m2/g as determined by BET analysis. A model batch adsorption experiment was performed to evaluate the efficiency of methylene blue (MB) dye removal from aqueous media. It was found that monolayer adsorption capacity calculated from the Langmuir isotherm was 0.6240 mg/g. Bi-MOF was also screened for its antibacterial and luminescent behavior.                     KEY WORDS: Bismuth, Metal-organic Frameworks, Luminescence, Sorption   Bull. Chem. Soc. Ethiop. 2021, 35(1), 119-128. DOI: https://dx.doi.org/10.4314/bcse.v35i1.10

Activation of Peroxymonosulfate by CuNi@C Derived from Metal–Organic Frameworks Precursor

2018 ◽  
Vol 71 (11) ◽  
pp. 874 ◽  
Author(s):  
Xue Huang ◽  
Jing Zhang ◽  
Xiao Zhang ◽  
Qing-Ping Wu ◽  
Chun-Hui Yan
Keyword(s):  
Photoelectron Spectroscopy ◽  
Metallic Copper ◽  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Oxidative Degradation ◽  
Acid Orange 7 ◽  
X Ray Diffraction ◽  
X Ray ◽  
Initial Ph ◽  
Metal Organic

Calcined Cu-based metal–organic frameworks impregnated with nickel nitrate catalysts (CuNi@C) were synthesised. X-Ray diffraction, scanning electronic microscopy, energy dispersive X-ray spectrometry, and X-ray photoelectron spectroscopy techniques were applied for the characterisation of the synthesised catalyst, which revealed an octahedral particle shape, rough surface, and metallic copper (Cu, CuO) and nickel (Ni, NiO) particles. CuNi@C was fabricated as a novel peroxymonosulfate (PMS) activator for the oxidative degradation of Acid Orange 7 (AO7) in aqueous media. Results showed that the CuNi@C/PMS system can efficiently degrade nearly 100 % of 0.02 mmol L−1 AO7 within 60 min. In addition, the trapping experiments confirmed the participation of sulfate radicals (SO4•−) and hydroxyl radicals (HO•) as reactive species in the system. Furthermore, the effects of parameters including catalyst and PMS dosages, initial concentration of AO7, and pH were studied. Results showed that the decolourisation efficiency increased with the increase of catalyst dosage, but decreased with the increase of AO7 concentration. The optimal PMS concentration was 0.675 mmol L−1, and initial pH showed no significant effect on the degradation of AO7. Moreover, the CuNi@C could be reused four times with good activity and reusability. Findings revealed that the CuNi@C/PMS system shows potential for degrading contaminants in the environment, due to its catalytic activity and non-negligible adsorption.

Two 3D ZnII Metal–Organic Frameworks with 3- and 8-Fold Interpenetration: Syntheses, Structures, Photodegradation, and Photoluminescent Properties

2017 ◽  
Vol 70 (3) ◽  
pp. 314 ◽  
Author(s):  
Chuan-Bin Fan ◽  
Xiang-Min Meng ◽  
Yu-Hua Fan ◽  
Zi-Ao Zong ◽  
Xiao-Yin Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Metal Organic Frameworks ◽  
Xrd Analysis ◽  
Donor Ligands ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Solvothermal Conditions ◽  
Single Crystal Xrd Analysis

Two novel coordination polymers, namely {[Zn(sbdc)(bmib)]·0.4H2O}n (1) and {[Zn(sbdc)(bibd)]·DMF}n (2) (H2sbdc = 4,4′-stilbenedicarboxylic, bmib = 1,4-bis(2-methylimidazol-1-yl)butane, bibd = 1,1′-(1,4-butanediyl)bis(imidazole), DMF = N,N-dimethylformamide), have been acquired under solvothermal conditions, and have been characterised by elemental analysis, infrared spectra, thermogravimetric analysis, and single-crystal X-ray diffraction (XRD). Single-crystal XRD analysis reveals that 1 shows eight-fold interpenetrating 3D frameworks with a four-connected (66) sqc6 topology and 2 displays four-connected three-fold interpenetrating 3D frameworks. The flexible N-donor ligands play an important role in the construction of the final topological structures for 1 and 2. Furthermore, 1 and 2 exhibit good photodegradation capability and photoluminescence properties.

scholarly journals Water-Driven Structural Transformation in Cobalt Trimesate Metal-Organic Frameworks

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4751
Author(s):  
Jayashree Ethiraj ◽  
Vinayagam Surya ◽  
Parasuraman Selvam ◽  
Jenny G. Vitillo
Keyword(s):  
Diffraction Pattern ◽  
Diffuse Reflectance ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Metal Organic ◽  
Divalent Cobalt

We report on the synthesis and the characterization of a novel cobalt trimesate metal-organic framework, designated as KCL-102. Powder X-ray diffraction pattern of KCL-102 is dominated by a reflection at 10.2° (d-spacing = 8.7 Å), while diffuse reflectance UV-Vis spectroscopy indicates that the divalent cobalt centers are in two different coordination geometries: tetrahedral and octahedral. Further, the material shows low stability in humid air, and it transforms into the well-known phase of hydrous cobalt trimesate, Co3(BTC)2·12H2O. We associated this transition with the conversion of the tetrahedral cobalt to octahedral cobalt.

scholarly journals Crystallographic characterization of the metal–organic framework Fe2(bdp)3 upon reductive cation insertion

2020 ◽  
Vol 11 (34) ◽  
pp. 9173-9180 ◽  
Author(s):  
Naomi Biggins ◽  
Michael E. Ziebel ◽  
Miguel I. Gonzalez ◽  
Jeffrey R. Long
Keyword(s):  
Single Crystal ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Organic Framework

Single-crystal X-ray diffraction reveals structural influences on gas adsorption properties in anionic metal–organic frameworks.

scholarly journals Luminescent Lanthanide Metal Organic Frameworks as Chemosensing Platforms towards Agrochemicals and Cations

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1260 ◽  
Author(s):  
Germán E. Gomez ◽  
María dos Santos Afonso ◽  
Héctor A. Baldoni ◽  
Federico Roncaroli ◽  
Galo J. A. A. Soler-Illia
Keyword(s):  
Limit Of Detection ◽  
Metal Organic Frameworks ◽  
Luminescent Properties ◽  
Spectral Lines ◽  
Nuclear Activity ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Solvothermal Methods ◽  
Hypersensitive Transitions

Since the first studies of luminescent sensors based on metal organic frameworks (MOFs) about ten years ago, there has been an increased interest in the development of specific sensors towards cations, anions, explosives, small molecules, solvents, etc. However, the detection of toxic compounds related to agro-industry and nuclear activity is noticeably scarce or even non-existent. In this work, we report the synthesis and characterization of luminescent lanthanide-based MOFs (Ln-MOFs) with diverse crystalline architectures obtained by solvothermal methods. The luminescent properties of the lanthanides, and the hypersensitive transitions of Eu3+ (5D0→7F2) and Tb3+ (5D4→7F5) intrinsically found in the obtained MOFs in particular, were evaluated and employed as chemical sensors for agrochemical and cationic species. The limit of detection (LOD) of Tb-PSA MOFs (PSA = 2-phenylsuccinate) was 2.9 ppm for [UO22+] and 5.6 ppm for [Cu2+]. The variations of the 4f–4f spectral lines and the quenching/enhancement effects of the Ln-MOFs in the presence of the analytes were fully analyzed and discussed in terms of a combinatorial “host–guest” vibrational and “in-silico” interaction studies.

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