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

A new three-dimensional twofold interpenetrated cadmium(II) metal–organic framework: synthesis, structure and photoluminescence properties

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Hong-Tao Zhang ◽  
Xiao-Long Wang
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Fluorescence Emission ◽  
Functional Materials ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Design And Synthesis ◽  
Metal Organic ◽  
Organic Framework

The design and synthesis of metal–organic frameworks (MOFs) have attracted much interest due to the aesthetics of their crystalline architectures and their potential applications as new functional materials. A new twofold interpenetrated three-dimensional (3D) MOF, namely, poly[[triaqua(μ4-(2R,2′R)-2,2′-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionato-κ7 O 1:O 1,O 1′:O 4:O 4,O 4′,O 4′′)(μ3-(2R,2′R)-2,2′-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionato-κ3 O 1:O 4:O 4)dicadmium(II)] dihydrate], {[Cd2(C14H14N2O6)2(H2O)3]·2H2O} n , (I), has been synthesized by the reaction of Cd(CH3COO)2·2H2O with the synthesized ligand (2R,2′R)-2,2′-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionic acid (H2 L). Single-crystal X-ray diffraction analysis reveals that the carboxylate groups from two crystallographically independent L 2− dianions link the cadmium cations into a one-dimensional helical secondary building unit (SBU). The resulting SBUs are extended into a 3D metal–organic framework via the terephthalamide moiety of the ligand as a spacer. In the crystal, two independent MOFs interpenetrate each other, thus producing a twofold interpenetrated 3D architecture, which shows an unprecedented 2-nodal (7,9)-connected net with the point (Schläfli) symbol (37·46·58)(38·411·516·6). MOF (I) was further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction and thermogravimetric analysis. The photoluminescence properties and UV–Vis absorption spectrum of (I) have also been investigated. The MOF exhibits enhanced fluorescence emission with a high photoluminescence quantum yield of 31.55% and a longer lifetime compared with free H2 L.

A fivefold interpenetrating diamondoid three-dimensional metal–organic framework constructed from benzene-1,4-diacetic acid and flexible triazole derivatives: poly[[(μ2-benzene-1,4-diacetato-κ2O:O){μ2-1,4-bis[(1H-1,2,4-triazol-1-yl)methyl]benzene-κ2N4:N4′}zinc(II)] monohydrate]

2013 ◽  
Vol 70 (1) ◽  
pp. 28-30 ◽  
Author(s):  
Hong Shen
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Polymeric Compound ◽  
X Ray ◽  
Twofold Axis ◽  
Carboxylate Groups ◽  
Metal Organic ◽  
Methyl Benzene ◽  
Organic Framework

In the title mixed-ligand metal–organic polymeric compound, {[Zn(C10H8O4)(C12H14N6)]·H2O}n, the asymmetric unit contains a divalent ZnIIcation lying on a twofold axis, one half of a fully deprotonated benzene-1,4-diacetate (PBEA) ligand, one half of a 1,4-bis[(1H-1,2,4-triazol-1-yl)methyl]benzene (BTX) ligand and a water molecule, also lying on a twofold axis. Each ZnIIcentre is surrounded by two O-donor atoms from monodentate carboxylate groups belonging to two different PBEA2−ligands and by two triazole N-donor atoms from two different BTX ligands. Single-crystal X-ray diffraction analysis revealed that the compound has a fivefold interpenetrating diamondoid three-dimensional metal–organic framework.

scholarly journals Study of Curcumin Adsorption of Nano Fe-based Metal-Organic Framework

2020 ◽  
Vol 4 (4) ◽  
pp. First
Author(s):  
Trang Thị Thu Nguyễn ◽  
Ý Thị Đặng ◽  
Linh Hồ Thùy Nguyễn ◽  
Hạnh Thị Kiều Tạ ◽  
Thắng Bách Phan ◽  
...  
Keyword(s):  
Particle Size ◽  
Metal Organic Framework ◽  
Crystal Formation ◽  
X Ray Diffraction ◽  
Isothermal Adsorption ◽  
Framework Materials ◽  
Metal Organic ◽  
Ft Ir ◽  
Adsorption Desorption ◽  
Organic Framework

Highly porous and biocompatible nano metal-organic framework materials (NMOF) are increasingly being applied in biomedical fields, especially as pharmaceutical adsorbent materials. Curcumin, found in turmeric, is a widely common herb in Eastern which has recently used in many applications in supporting cancer treatment. In the synthesis of MOF materials, the use of surfactants allows to control the morphology, the process of crystal formation and development and particle size of the material. In this research, MIL-100 (Fe) nanomaterials were successfully synthesized at room temperature in the presence of polyvinylpyrrolidone surfactant (PVP) to control the nanoparticle size about 50 nm in size. The synthesized MOF structure and properties were analyzed by using characterization techniques, including powder X-ray diffraction (PXRD), fourier-transform infrared (FT-IR), thermal gravimetric analyses (TGA) and nitrogen isothermal adsorption-desorption at 77 K. The characterization results showed that MIL-100 (Fe) nanomaterials have high crystallinity, large surface area, and highly thermal stability. However, its particle size is very small, only about 50 nm. Curcumin adsorption studies exhibited that this material had the ability to adsorb curcumin with an adsorption capacity up to 64.36 mg g-1. Kinetic and mechanism studies revealed that curcumin adsorption followed the pseudo-second model. In addition, thermodynamic studies proved that this was a spontaneous and exothermic adsorption process.

Alkali/alkaline earth-based metal–organic frameworks on biomedical applications

2021 ◽  
Author(s):  
Jian-Qiang Liu ◽  
Gaomin Ye ◽  
Chen Chen ◽  
Jingzhe Lin ◽  
Xinsheng Peng ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Alkaline Earth ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Metal Organic ◽  
Application Prospects ◽  
Organic Framework

With steady development of metal-organic framework (MOF) materials, this peculiar class of three-dimensional materials finds application prospects in myriad of areas. The integration of different metals with varied categories of...

Assembly of 1,2,3,4-Benzenetetracarboxylic Acid and Zinc(II) Metal Centers to a Chiral 3D Metal-organic Framework: Syntheses, Structure and Properties

2011 ◽  
Vol 66 (5) ◽  
pp. 533-537
Author(s):  
Can Ji ◽  
Shuang-Quan Zang ◽  
Jun-Yi Liu ◽  
Jia-Bin Li ◽  
Hong-Wei Hou
Keyword(s):  
Second Harmonic ◽  
Bulk Material ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Metal Centers ◽  
X Ray ◽  
Metal Organic ◽  
The Individual ◽  
Organic Framework

A new three-dimensional metal-organic framework {[Zn(mpda)0.5(bix)]·(H2O)1.5}n (1) (H4mpda = 1,2,3,4-benzenetetracarboxylic acid, m-bix = 1,3-bis(imidazol-1-ylmethyl)-benzene) has been synthesized and characterized by single-crystal X-ray diffraction and IR spectra. In 1, homochiral helical chains are formed in the Zn-mpda layer through spontaneous resolution by mpda4−. Such layers are further connected through the second m-bix ligand to form a 3D chiral metal-organic framework. The individual (4,4)-connected net in 1 can be specified by the Schläfli symbol (66)2(64.82). Bulk material of 1 has good second-harmonic generation (SHG) activity, approximately 0.4 times that of urea. In addition, a thermogravimetric analysis was carried out, and the photoluminescent behavior of the complex was also investigated

scholarly journals Evaluation of two- and three-dimensional electrode platforms for the electrochemical characterization of organometallic catalysts incorporated in non-conducting metal–organic frameworks

2017 ◽  
Vol 46 (15) ◽  
pp. 4907-4911 ◽  
Author(s):  
Edgar Mijangos ◽  
Souvik Roy ◽  
Sonja Pullen ◽  
Reiner Lomoth ◽  
Sascha Ott
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Electrochemical Characterization ◽  
Organometallic Catalysts ◽  
Metal Organic ◽  
Organic Framework

The development of a reliable platform to electrochemically probe a molecular diiron complex, [FeFe], grafted in a non-conductive metal–organic framework, UiO-66, is reported.

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.

Novel optoelectronic metal organic framework material perylene tetracarboxylate magnesium: preparation and biosensing

Nanoscale ◽  
2021 ◽  
Vol 13 (38) ◽  
pp. 16244-16250
Author(s):  
Fangjing Mo ◽  
Qian Han ◽  
Min Chen ◽  
Hui Meng ◽  
Jiang Guo ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Ultrasensitive Detection ◽  
Tetracarboxylic Acid ◽  
Metal Organic ◽  
Dna Scaffold ◽  
Organic Framework

We synthesized stable magnesium 3,4,9,10-perylene tetracarboxylic acid metal–organic frameworks applied them in a PEC regenerated-biosensor along with target-triggered three-dimensional DNA Scaffold for ultrasensitive detection of microRNA 21.

scholarly journals Fluorescein Hydrazide-Appended Metal–Organic Framework as a Chromogenic and Fluorogenic Chemosensor for Mercury Ions

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5773
Author(s):  
Aasif Helal ◽  
Muhammed Naeem ◽  
Mohammed Fettouhi ◽  
Md. Hasan Zahir
Keyword(s):  
Photoelectron Spectroscopy ◽  
Tap Water ◽  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
Green Fluorescence ◽  
Aqueous Emulsion ◽  
X Ray ◽  
Metal Organic ◽  
Ft Ir ◽  
Organic Framework

In this work, we prepared a fluorescein hydrazide-appended Ni(MOF) (Metal–Organic Framework) [Ni3(BTC)2(H2O)3].(DMF)3(H2O)3 composite, FH@Ni(MOF). This composite was well-characterized by PXRD (powder X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy), N2 adsorption isotherm, TGA (thermogravimetric analysis), XPS (X-ray photoelectron spectroscopy), and FESEM (field emission scanning electron microscopy). This composite was then tested with different heavy metals and was found to act as a highly selective and sensitive optical sensor for the Hg2+ ion. It was found that the aqueous emulsion of this composite produces a new peak in absorption at 583 nm, with a chromogenic change to a pink color visible to the naked eye upon binding with Hg2+ ions. In emission, it enhances fluorescence with a fluorogenic change to green fluorescence upon complexation with the Hg2+ ion. The binding constant was found to be 9.4 × 105 M−1, with a detection limit of 0.02 μM or 5 ppb. This sensor was also found to be reversible and could be used for seven consecutive cycles. It was also tested for Hg2+ ion detection in practical water samples from ground water, tap water, and drinking water.

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