Stimulus‐Responsive Metal–Organic Frameworks

Nagarkar, Sanjog S.; Desai, Aamod V.; Ghosh, Sujit K.

doi:10.1002/asia.201402004

Cited by 114 publications

(73 citation statements)

References 106 publications

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“…Over the past two decades, MOFs have attracted extensive interest for their great potential in many applications such as gas separation/storage,11, 12, 13, 14, 15, 16, 17 catalysis,18, 19, 20 drug delivery,21 and luminescence sensing 2, 3, 4, 22, 23. As for conventional metal complexes, photoluminescence properties of MOFs can be finely tuned by rational selection of metal ions and design of organic ligands.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9][10] Over the past two decades, MOFs have attracted extensive interest for their great potential in many applications such as gas separation/storage, [11][12][13][14][15][16][17] catalysis, [18][19][20] drug delivery, [ 21 ] and luminescence sensing. [2][3][4]22,23 ] As for conventional metal complexes, photoluminescence properties of MOFs can be fi nely tuned by rational selection of metal ions and design of organic ligands. Since the metal ions and ligands in MOFs are arranged in highly ordered arrays with controllable spatial distribution, [ 24,25 ] self-quenching between adjacent luminophores can be reduced or avoided, giving enhanced luminescence intensity.…”

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confidence: 99%

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Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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Luminescence of porous coordination polymers (PCPs) or metal–organic frameworks (MOFs) is sensitive to the type and concentration of chemical species in the surrounding environment, because these materials combine the advantages of the highly regular porous structures and various luminescence mechanisms, as well as diversified host‐guest interactions. In the past few years, luminescent MOFs have attracted more and more attention for chemical sensing of gas‐phase analytes, including common gases and vapors of solids/liquids. While liquid‐phase and gas‐phase luminescence sensing by MOFs share similar mechanisms such as host‐guest electron and/or energy transfer, exiplex formation, and guest‐perturbing of excited‐state energy level and radiation pathways, via various types of host‐guest interactions, gas‐phase sensing has its unique advantages and challenges, such as easy utilization of encapsulated guest luminophores and difficulty for accurate measurement of the intensity change. This review summarizes recent progresses by using luminescent MOFs as reusable sensing materials for detection of gases and vapors of solids/liquids especially for O2, highlighting various strategies for improving the sensitivity, selectivity, stability, and accuracy, reducing the materials cost, and developing related devices.

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Section: Introductionmentioning

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Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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“…However, the regeneration of MOF‐based adsorbents using chemicals such as strong acids and bases is highly undesirable in terms of adverse environmental impact and process costs. The alternative way is to fabricate environmental‐friendly stimuli‐responsive MOFs that can response to physical stimuli, such as light, temperature, and pressure. Starting from functionalization of ligands with light‐responsive azobenzene group, several light‐ and thermoresponsive MOFs have been observed in the past few years for controllable gas separation and storage and molecular adsorption in water .…”

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confidence: 99%

Thermoresponsive Amphoteric Metal–Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water

Zhang

Wei

et al. 2018

Advanced Materials

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Regenerable, high-efficiency salt sorption materials are highly desirable for water treatment. Here, a thermoresponsive, amphoteric metal-organic framework (MOF) material is reported that can adsorb multiple salts from saline water at room temperature and effectively release the adsorbed salts into water at elevated temperature (e.g., 80 °C). The amphoteric MOF, integrated with both cation-binding carboxylic groups and anion-binding tertiary amine groups, is synthesized by introducing a polymer with tertiary amine groups into the cavities of a water-stable MOF such as MIL-121 with carboxylic groups inside its frameworks. The amphoterized MIL-121 exhibits excellent salt adsorption properties, showing stable adsorption-desorption cycling performances and high LiCl, NaCl, MgCl , and CaCl adsorption capacities of 0.56, 0.92, 0.25, and 0.39 mmol g , respectively. This work provides a novel, effective strategy for synthesizing new-generation, environmental-friendly, and responsive salt adsorption materials for efficient water desalination and purification.

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“…changes in the free energy landscape), upon application of external stimuli. 4,5,6,7,8,9,10 On the other hand, and in sharp contrast, crystallization processes in living systems (i.e. biomineralization), as well as biomimetic crystallizations, often occur under non-equilibrium conditions (e.g.…”

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confidence: 99%

Unveiling Pathway Complexity in the Growth of a Spin-Crossover MOF via Engineered Liquid-Liquid Interfacial Reactions

Galve¹,

Abrishamkar²,

Sorrenti³

et al. 2019

Preprint

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Coordination polymers (CPs), including metal-organic frameworks (MOFs), have recently emerged as a platform to design new materials with novel applications in fields such as electronics, magnetism, catalysis, optics and gas storage/separation. However, the pathways followed and the mechanisms underlying their formation remain largely unknown and unresolved. Accordingly, the elucidation of associated growth mechanisms remains the key obstacle in accessing new properties and functions in such materials. Herein, we demonstrate that reaction-diffusion (RD) conditions accomplished within microfluidic reaction systems can be used to uncover different crystallization pathways undertaken by spin-crossover MOFs towards their thermodynamic products. Specifically, microfluidic RD mixing (providing kinetic control) enables two peculiar nucleation-growth pathways characterized by well-defined metastable intermediates, which have never been observed in bulk environments (under thermodynamic control). Contrarily, in the latter case, crystallization by particle attachment (mesoscale assembly) is observed. These unprecedented results provide a sound basis for understanding coordination polymer growth, and open up new avenues for the engineering of advanced functional materials. The chemical and physical properties of functional materials strongly depend on the nature and arrangement of their constituent units. 1 The vast current knowledge on molecular self-assembly allows for the preparation of materials with controllable physico-chemical properties, with the position and orientation of the constituent units being coordinated within the final structure. 2 In this respect, crystals of organic-inorganic materials such as coordination polymers (CPs), including metal-

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Stimulus‐Responsive Metal–Organic Frameworks

Cited by 114 publications

References 106 publications

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Thermoresponsive Amphoteric Metal–Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water

Unveiling Pathway Complexity in the Growth of a Spin-Crossover MOF via Engineered Liquid-Liquid Interfacial Reactions

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