Coordinatively unsaturated metal sites (open metal sites) in metal–organic frameworks: design and applications

Kökçam-Demir, Ülkü; Goldman, Anna; Esrafili, Leili; Gharib, Maniya; Morsali, Ali; Weingart, Oliver; Janiak, Christoph

doi:10.1039/c9cs00609e

Cited by 498 publications

(348 citation statements)

References 388 publications

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“…The competitive binding in both acidic and alkaline environments leads to the MOFs to be kinetically labile. [189] As a part of many contributions, these theoretical and practical investigations will provide valuable strategies on improving stability of MOFs. [190] was successfully utilized to absorb anionic methyl orange (MO) and cationic methylene blue (MB) via electrostatic interaction between MOF-235 and dyes, and a possible π-π interaction between benzene rings of MOF-235 ligand and dyes of MO and MB.…”

Section: Stability Of Mofsmentioning

confidence: 99%

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Nong¹,

Liu²,

Wang³

et al. 2020

ES Food Agroforest

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Investigation on food safety and preservation is essential to provide high quality and safe food for human beings, including accurate determination and efficient removal of inorganic heavy metal ions and organic contaminants, as well as regulation of food postharvest ripening and intelligent sterilization. In the last two decades, metal-organic frameworks (MOFs), as functionalized porous materials, have aroused interests of researchers because of their advantages of high porosity, large specific surface area, flexible structure properties, and abundant binding sites for guest molecules. MOFs have shown great potentials in practical applications in food and related fields. In this overview, we summarized the MOF crystallization mechanisms, synthesis routes and methods, stability, as well as the applications in food contamination including removal of heavy metal ions, dyes, and antibiotics, and food preservation including regulation of fruit and vegetable ripening, removal of moisture and oxygen, and high-efficiency sterilization. Finally, two perspectives focusing on the development of MOFs for innovative food research, i.e., food-grade MOFs and MOF composites are suggested based on our understanding.

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Section: Stability Of Mofsmentioning

confidence: 99%

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Nong¹,

Liu²,

Wang³

et al. 2020

ES Food Agroforest

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show abstract

“…MOFs have various attractive properties including open metal sites (OMSs or coordinatively unsaturated sites) [22] and framework flexibility [23] . OMSs are observed in some special MOFs like MIL‐100, MIL‐101, Cu‐BTC and MOF‐74 because of facile removal of coordinated water or solvent via heating or evacuation [22] . Since OMSs can be a Lewis acid site, ther147…”

Section: Introduction To Mofsmentioning

confidence: 99%

“…e are various applications including acid catalysis and selective removal of Lewis basic compounds (via a coordination bond) [22] . The framework flexibility is another special property of MOFs that leads to breathing MOFs or MOFs with different crystal structures [23]…”

Section: Introduction To Mofsmentioning

confidence: 99%

Application of Metal‐Organic Frameworks in Adsorptive Removal of Organic Contaminants from Water, Fuel and Air

Ahmed

Mondol

Lee

et al. 2021

Chemistry An Asian Journal

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Currently, our environment is contaminated with various toxic substances. Removal of such hazardous materials from water, air and fuel is important for sustainability. In this minireview, adsorptive removal of organic substances, by using metal‐organic frameworks (MOFs), for our safe environment will be discussed. For example, removal of (i) pharmaceuticals/personal care products, pesticides, and dyes from water; (ii) S‐ or N‐containing compounds from liquid fuel; and (iii) volatile organic compounds from air will be summarized. Moreover, plausible mechanisms to explain the observation will also be discussed. Finally, prospects in the field will be suggested for further research and development.

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“…For instance, as NH 3 acts both as a Lewis base and a Brønsted base, acidic sites on a porous platform could enhance its capture at low concentrations. Such acidic sites could be achieved by removing the solvent molecules on the nodes of MOFs to generate open metal sites with high Lewis acidity; [48] incorporating acidic functional groups such as carboxylic acid, phosphoric acid, and sulfonic acid groups to POPs; [49] or introducing metal ions to COFs. [50] In the postsynthetic approach, a variety of acidic groups, such as carboxylic acid or sulfonic acid groups, could be functionalized on the pore surface to promote the chemisorption of the basic gas.…”

Section: Introductionmentioning

confidence: 99%

Emerging Porous Materials and Their Composites for NH₃ Gas Removal

Kang

Kim

et al. 2020

Advanced Science

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NH 3 , essential for producing artificial fertilizers and several military and commercial products, is being produced at a large scale to satisfy increasing demands. The inevitable leakage of NH 3 during its utilization, even in trace concentrations, poses significant environmental and health risks because of its highly toxic and reactive nature. Although numerous techniques have been developed for the removal of atmospheric NH 3 , conventional NH 3 abatement systems possess the disadvantages of high maintenance cost, low selectivity, and emission of secondary wastes. In this context, highly tunable porous materials such as metal-organic frameworks, covalent organic frameworks, hydrogen organic frameworks, porous organic polymers, and their composite materials have emerged as next-generation NH 3 adsorbents. Herein, recent progress in the development of porous NH 3 adsorbents is summarized; furthermore, factors affecting NH 3 capture are analyzed to provide a reasonable strategy for the design and synthesis of promising materials for NH 3 abatement.

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Coordinatively unsaturated metal sites (open metal sites) in metal–organic frameworks: design and applications

Abstract: The defined synthesis of OMS in MOFs is the basis for targeted functionalization through grafting, the coordination of weakly binding species and increased (supramolecular) interactions with guest molecules.

Cited by 498 publications

References 388 publications

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Application of Metal‐Organic Frameworks in Adsorptive Removal of Organic Contaminants from Water, Fuel and Air

Emerging Porous Materials and Their Composites for NH₃ Gas Removal

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Coordinatively unsaturated metal sites (open metal sites) in metal–organic frameworks: design and applications

Abstract: The defined synthesis of OMS in MOFs is the basis for targeted functionalization through grafting, the coordination of weakly binding species and increased (supramolecular) interactions with guest molecules.

Cited by 498 publications

References 388 publications

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

Application of Metal‐Organic Frameworks in Adsorptive Removal of Organic Contaminants from Water, Fuel and Air

Emerging Porous Materials and Their Composites for NH3 Gas Removal

Contact Info

Product

Resources

About

Emerging Porous Materials and Their Composites for NH₃ Gas Removal