From 1D Coordination Polymers to Metal Organic Frameworks by the Use of 2-Pyridyl Oximes

The synthesis and characterization of coordination polymers and metal–organic frameworks (MOFs) has attracted a significant interest over the last decades due to their fascinating physical properties, as well as their use in a wide range of technological, environmental, and biomedical applications. The initial use of 2-pyridyl oximic ligands such as pyridine-2 amidoxime (H2pyaox) and 2-methyl pyridyl ketoxime (Hmpko) in combination with 1,2,4,5-benzene tetracarboxylic acid (pyromellitic acid), H4pma, provided access to nine new compounds whose structures and properties are discussed in detail. Among them, [Zn2(pma)(H2pyaox)2(H2O)2]n (3) and [Cu4(OH)2(pma)(mpko)2]n (9) are the first MOFs based on a 2-pyridyl oxime with 9 possessing a novel 3,4,5,8-c net topology. [Zn2(pma)(H2pyaox)2]n (2), [Cu2(pma)(H2pyaox)2(DMF)2]n (6), and [Cu2(pma)(Hmpko)2(DMF)2]n (8) join a small family of coordination polymers containing an oximic ligand. 9 exhibits selectivity for FeIII ions adsorption, as was demonstrated by a variety of techniques including UV-vis, EDX, and magnetism. DC magnetic susceptibility studies in 9 revealed the presence of strong antiferromagnetic interactions between the metal centers, which lead to a diamagnetic ground state; it was also found that the magnetic properties of 9 are affected by the amount of the encapsulated Fe3+ ions, which is a very desirable property for the development of magnetism-based sensors.

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Expanding the NUIG MOF Family: synthesis and characterization of new MOFs for selective CO2 adsorption, metal ion removal from aqueous systems, and drug delivery applications

Dalton Transactions ◽

10.1039/d1dt00940k ◽

2021 ◽

Author(s):

Meghan Winterlich ◽

Darragh McHugh ◽

Evan O'Toole ◽

Katerina Skordi ◽

Ciaran O'Malley ◽

...

Keyword(s):

Metal Ion ◽

Biomedical Applications ◽

Co2 Adsorption ◽

Metal Organic Frameworks ◽

Synthesis And Characterization ◽

Metal Ion Removal ◽

Ion Removal ◽

Wide Range ◽

Metal Organic

Metal organic frameworks (MOFs) have attracted considerable attention in recent years due to their use in a wide range of environmental, industrial and biomedical applications. The employment of benzophenone-4,4’-dicarboxylic acid...

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Influence of the substitution pattern of four naphthalenedicarboxylic acids on the structures and properties of group 13 metal–organic frameworks and coordination polymers

Dalton Transactions ◽

10.1039/d0dt00387e ◽

2020 ◽

Vol 49 (15) ◽

pp. 4861-4868 ◽

Cited By ~ 3

Author(s):

Timo Rabe ◽

Harm Pewe ◽

Helge Reinsch ◽

Tom Willhammar ◽

Erik Svensson Grape ◽

...

Keyword(s):

Coordination Polymers ◽

Metal Organic Frameworks ◽

Systematic Investigation ◽

Substitution Pattern ◽

Group 13 ◽

Structures And Properties ◽

Metal Organic

Systematic investigation on Al- and Ga-MOFs and CPs containing differently substituted naphthalenedicarboxylate ions.

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Three Mn(II) metal organic frameworks with the same chemical compositions, but different topological structures and properties

CrystEngComm ◽

10.1039/d1ce00064k ◽

2021 ◽

Author(s):

Li Tian ◽

Zhi Long Ma ◽

Mengchen Wang ◽

Jian Yun Shi

Keyword(s):

Coordination Polymers ◽

Terephthalic Acid ◽

Metal Organic Frameworks ◽

Solvothermal Reaction ◽

Chemical Compositions ◽

X Ray Diffraction ◽

X Ray ◽

Multidentate Ligand ◽

Structures And Properties ◽

Metal Organic

Solvothermal reaction of a novel multidentate ligand 2,5-bis-(1,2,4-triazol-1-yl)-terephthalic acid (H2TTPA), with MnCl2 afforded three structurally different coordination polymers with the similar formula [Mn(TTPA)•H2O]n (Mn-(1-3)). Single-crystal X-ray diffraction analyses show that...

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Three 3D Metal-Organic Frameworks Constructed from Keggin Polyanions and Multi-nuclear AgI Clusters: Assembly, Structures and Properties

Zeitschrift für Naturforschung B ◽

10.5560/znb.2013-3007 ◽

2013 ◽

Vol 68 (7) ◽

pp. 778-788 ◽

Cited By ~ 8

Author(s):

Xiu-Li Wang ◽

Na Li ◽

Ai-Xiang Tian ◽

Jun Ying ◽

Guo-Cheng Liu ◽

...

Keyword(s):

Ir Spectroscopy ◽

Metal Organic Frameworks ◽

X Ray Diffraction ◽

Hydrothermal Conditions ◽

X Ray ◽

Structures And Properties ◽

Elemental Analyses ◽

Metal Organic ◽

New Compounds ◽

Inorganic Ligands

Three Keggin-based metal-organic frameworks (MOFs) containing multi-nuclear silver subunits, [Ag7(ptz)5(H2O)2][H2SiMo12O40] (1), [Ag8(ptz)5(H2O)2][AsW12O40] (2) and [Ag7(ptz)5(H2O)][HAsMo12O40] (3) (ptzH=5-(4-pyridyl)-tetrazole), have been synthesized under hydrothermal conditions by changing the inorganic polyanions. The new compounds have been characterized by elemental analyses, TG analyses, IR spectroscopy, and single-crystal X-ray diffraction. In compound 1, the multi-nuclear Ag5(ptz)5 subunits are interconnected to form chains, which are further linked by AgI cations to construct a 3D MOF with large channels. Pairs of SiMo12O404- polyanions reside in the channels as penta-dentate inorganic ligands. In 2, six AgI cations link five ptz- anions to construct a hexa-nuclear subunit [Ag6(ptz)5]+, which is interconnected to form chains. These chains are further linked by AgI cations to construct a 3D MOF, where AsW12O403- polyanions reside as hexa-dentate ligands. Compound 3exhibits a 3D MOF based on Ag5(ptz)5 subunits, in which the hexa-dentate AsMo12O403- polyanions are incorporated. The rigid tetrazole-based ligand ptz- plays an important role in the formation of the multi-nuclear subunits of the title compounds. The electrochemical properties of compound 1and the photocatalytic properties of compounds 1and 3have been investigated.

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Biomedical Applications of Metal−Organic Frameworks for Disease Diagnosis and Drug Delivery: A Review

Nanomaterials ◽

10.3390/nano12020277 ◽

2022 ◽

Vol 12 (2) ◽

pp. 277

Author(s):

Miral Al Sharabati ◽

Rana Sabouni ◽

Ghaleb A. Husseini

Keyword(s):

Drug Delivery ◽

Biomedical Applications ◽

Chemical Engineering ◽

Metal Organic Frameworks ◽

Disease Diagnosis ◽

Inorganic Materials ◽

Synthesis Methods ◽

High Porosity ◽

Wide Range ◽

Metal Organic

Metal−organic frameworks (MOFs) are a novel class of porous hybrid organic−inorganic materials that have attracted increasing attention over the past decade. MOFs can be used in chemical engineering, materials science, and chemistry applications. Recently, these structures have been thoroughly studied as promising platforms for biomedical applications. Due to their unique physical and chemical properties, they are regarded as promising candidates for disease diagnosis and drug delivery. Their well-defined structure, high porosity, tunable frameworks, wide range of pore shapes, ultrahigh surface area, relatively low toxicity, and easy chemical functionalization have made them the focus of extensive research. This review highlights the up-to-date progress of MOFs as potential platforms for disease diagnosis and drug delivery for a wide range of diseases such as cancer, diabetes, neurological disorders, and ocular diseases. A brief description of the synthesis methods of MOFs is first presented. Various examples of MOF-based sensors and DDSs are introduced for the different diseases. Finally, the challenges and perspectives are discussed to provide context for the future development of MOFs as efficient platforms for disease diagnosis and drug delivery systems.

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Pillared, 3D Metal-Organic Frameworks with Rectangular Channels. Synthesis and Characterization of Coordination Polymers Based on Tricadmium Carboxylates

Inorganic Chemistry ◽

10.1021/ic991360u ◽

2000 ◽

Vol 39 (10) ◽

pp. 2189-2198 ◽

Cited By ~ 68

Author(s):

Owen R. Evans ◽

Wenbin Lin

Keyword(s):

Coordination Polymers ◽

Metal Organic Frameworks ◽

Synthesis And Characterization ◽

Rectangular Channels ◽

Metal Organic

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Multivariant synthesis, crystal structures and properties of four nickel coordination polymers based on flexible ligands

CrystEngComm ◽

10.1039/c8ce00837j ◽

2018 ◽

Vol 20 (34) ◽

pp. 5045-5055 ◽

Cited By ~ 10

Author(s):

Sheng-Quan Lu ◽

Kang Fang ◽

Yong-Yao Liu ◽

Ming-Xing Li ◽

Sui-Jun Liu ◽

...

Keyword(s):

Crystal Structures ◽

Structural Transformation ◽

Coordination Polymers ◽

Metal Organic Frameworks ◽

Structures And Properties ◽

Metal Organic ◽

Flexible Ligands

Four new Ni(ii) metal–organic frameworks with diverse structures have been synthesized under different conditions. The structural transformation from compound 4 to 3 has also been investigated.

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Tuning the Redox Activity of Metal−Organic Frameworks for Enhanced, Selective O2 Binding

10.26434/chemrxiv.10316681.v1 ◽

2019 ◽

Author(s):

Andrew Rosen ◽

M. Rasel Mian ◽

Timur Islamoglu ◽

Haoyuan Chen ◽

Omar Farha ◽

...

Keyword(s):

Density Functional ◽

Metal Organic Frameworks ◽

Redox Activity ◽

Screening Methods ◽

Bridging Ligands ◽

Metal Centers ◽

Computational Screening ◽

Open Metal Sites ◽

Metal Organic ◽

Unsaturated Metal Sites

Metal−organic frameworks (MOFs) with coordinatively unsaturated metal sites are appealing as adsorbent materials due to their tunable functionality and ability to selectively bind small molecules. Through the use of computational screening methods based on periodic density functional theory, we investigate O2 and N2 adsorption at the coordinatively unsaturated metal sites of several MOF families. A variety of design handles are identified that can be used to modify the redox activity of the metal centers, including changing the functionalization of the linkers (replacing oxido donors with sulfido donors), anion exchange of bridging ligands (considering μ-Br-, μ-Cl-, μ-F-, μ-SH-, or μ-OH- groups), and altering the formal oxidation state of the metal. As a result, we show that it is possible to tune the O2 affinity at the open metal sites of MOFs for applications involving the strong and/or selective binding of O2. In contrast with O2 adsorption, N2 adsorption at open metal sites is predicted to be relatively weak across the MOF dataset, with the exception of MOFs containing synthetically elusive V2+ open metal sites. As one example from the screening study, we predict that exchanging the μ-Cl- ligands of M2Cl2(BBTA) (H2BBTA = 1H,5H-benzo(1,2-d:4,5-d′)bistriazole) with μ-OH- groups would significantly enhance the strength of O2 adsorption at the open metal sites without a corresponding increase in the N2 affinity. Experimental investigation of Co2Cl2(BBTA) and Co2(OH)2(BBTA) confirms that the former exhibits only weak physisorption, whereas the latter is capable of chemisorbing O2 at room temperature. The chemisorption behavior is attributed to the greater electron-donating character of the μ-OH- ligands and the presence of H-bonding interactions between the μ-OH- bridging ligands and the O2 adsorbate.

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Single crystal to single crystal transformation of spin-crossover coordination polymers from 3D frameworks to 2D layers

Journal of Materials Chemistry C ◽

10.1039/d1tc00470k ◽

2021 ◽

Vol 9 (15) ◽

pp. 5082-5087

Author(s):

Yu Gong ◽

Wang-Kang Han ◽

Hui-Shu Lu ◽

Qing-Tao Hu ◽

Huan Tu ◽

...

Keyword(s):

Magnetic Properties ◽

Single Crystal ◽

Coordination Polymers ◽

Ligand Exchange ◽

Spin Crossover ◽

Metal Organic Frameworks ◽

Crystal Transformation ◽

Metal Organic

New Hofmann-type metal–organic frameworks display rare and complete ligand exchange induced single crystal to single crystal transformations from 3D frameworks to 2D layers, accompanied by magnetic properties transition from two-step SCO behavior to hysteretic SCO behavior.

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Synthesis, designing strategies and photocatalytic charge dynamics of Metal-Organic Frameworks (MOFs): A catalyzed Photo-degradation approach towards Organic Dyes

Catalysis Science & Technology ◽

10.1039/d0cy02275f ◽

2021 ◽

Author(s):

Ayushi Singh ◽

Ashish Kumar Singh ◽

Jian-Qiang Liu ◽

Abhinav Kumar

Keyword(s):

Small Molecule ◽

Coordination Polymers ◽

Organic Dyes ◽

Metal Organic Frameworks ◽

Gas Storage ◽

New Variety ◽

Photo Degradation ◽

Charge Dynamics ◽

Potential Applications ◽

Metal Organic

Metal-organic frameworks (MOFs) or coordination polymers (CPs) are regarded as new variety of materials that find potential applications in plethora of areas such as gas/small molecule absorption/separation, gas storage, membranes...

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