Large-area self-standing thin film of porous hydrogen-bonded organic framework for efficient uranium extraction from seawater

Kaushik, Ashwini; Marvaniya, Karan; Kulkarni, Y. S.; Bhatt, Dhruv; Bhatt, Jahanvi; Mane, Manoj V.; Suresh, E.; Tothadi, Srinu; Patel, Ketan; Kushwaha, S. S.

doi:10.1016/j.chempr.2022.07.009

Cited by 41 publications

(61 citation statements)

References 86 publications

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“…CSMCRI HOF-1, which is self-assembled by PMAP decorated with pyridine and phenoxy-imine groups, exhibits significant UES capacities (Figure 22). 164 CSMCRI HOF-1 is very stable and can retain its structure even under severe acidity, basicity, and saturated salt solutions. A high density of pockets with a diameter of ca.…”

Section: Heterogeneous Catalysismentioning

confidence: 99%

Multifunctional Porous Hydrogen-Bonded Organic Frameworks: Current Status and Future Perspectives

et al. 2022

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Hydrogen-bonded organic frameworks (HOFs), self-assembled from organic or metalated organic building blocks (also termed as tectons) by hydrogen bonding, π−π stacking, and other intermolecular interactions, have become an emerging class of multifunctional porous materials. So far, a library of HOFs with high porosity has been synthesized based on versatile tectons and supramolecular synthons. Benefiting from the flexibility and reversibility of H-bonds, HOFs feature high structural flexibility, mild synthetic reaction, excellent solution processability, facile healing, easy regeneration, and good recyclability. However, the flexible and reversible nature of H-bonds makes most HOFs suffer from poor structural designability and low framework stability. In this Outlook, we first describe the development and structural features of HOFs and summarize the design principles of HOFs and strategies to enhance their stability. Second, we highlight the state-ofthe-art development of HOFs for diverse applications, including gas storage and separation, heterogeneous catalysis, biological applications, sensing, proton conduction, and other applications. Finally, current challenges and future perspectives are discussed.

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Section: Heterogeneous Catalysismentioning

confidence: 99%

Multifunctional Porous Hydrogen-Bonded Organic Frameworks: Current Status and Future Perspectives

et al. 2022

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“… 3 , 4 Although these properties of these framework materials make them very promising for separation and sensing but they offer poor solubility hence processing them is difficult, also they lack long-term chemical and hydrolytic resistance. 1 , 5 Whereas, the other class of crystalline, porous, three-dimensional Hydrogen bonded Organic Frameworks (HOFs) are assembled through the combination of weak hydrogen bonds supported by strong secondary interactions (i.e., π-π stacking, CH···π, van der Waals interactions dipole–dipole interactions, halogen bonds, the cation-π interactions etc.). 3 , 4 Designing permanently porous HOFs is challenging, due to lacking design strategies and limited library of organic modules resulting in random porous/non-porous HOFs.…”

Section: Before You Beginmentioning

confidence: 99%

“… 5 The H-bonding motif can form adduct with the polar solvent leading to structural collapse upon removal of solvent molecules and eventually losing the porosity. 1 , 5 Although, the phenoxy groups are placed under potential H-bonding synthons and phenoxy-imine building blocks have been extensively used in developing COFs, yet there is scarcely any work on developing HOF with phenoxy-imine modules. 1 …”

Section: Before You Beginmentioning

confidence: 99%

“… 1 , 5 Although, the phenoxy groups are placed under potential H-bonding synthons and phenoxy-imine building blocks have been extensively used in developing COFs, yet there is scarcely any work on developing HOF with phenoxy-imine modules. 1 …”

Section: Before You Beginmentioning

confidence: 99%

“…We have developed a new and highly directional phenoxy-imine based H-bonding motif to yield chemically and hydrolytically stable isoreticular CSMCRI HOF-1, with permanently porous channels and high surface area. 1 …”

Section: Before You Beginmentioning

confidence: 99%

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Protocol for the synthesis and use of U selective hydrogen-bonded organic framework to prepare large-area free-standing thin film

et al. 2023

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Amidoxime‐based Star Polymer Adsorbent with Ultra‐High Uranyl Affinity for Extremely Fast Uranium Extraction from Natural Seawater

Yi,

Cen,

et al. 2024

Adv Funct Materials

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Polymer adsorbents functionalized with amidoxime groups are widely considered to have the most industrial potential for uranium extraction from seawater. However, the entanglement upon the collapse of polymer chain in seawater greatly reduces the utilization ratio of amidoxime ligands. Herein, a novel star‐shaped molecular brush adsorbent (β‐CD‐g‐PAO) is obtained by densely grafting polyamidoxime (PAO) chains from β‐cyclodextrin (β‐CD). Experimental and theoretical results reveal that, in contrast to conventional linear polymer adsorbents, the star polymer adsorbent with a high grafting density of PAO side chains enables strong steric repulsion between the polymer chains, leading to increased persistence length and disentanglement of side chains. As a result, the star polymer adsorbent shows higher accessibility of the adsorption ligands with lower adsorption energy, achieving an adsorption capacity of up to 944.75 mg g−1 in uranium‐spiked seawater, surpassing that of conventional linear PAO by 3.2 times. Remarkably, this star polymer adsorbent demonstrates an extraordinarily adsorption capacity of 10.9 mg−1 g−1 in only 1 day in natural seawater, coupled with excellent affinity for uranyl ions (K = 0.31 pM). The unique topological structure design provides a new approach to solving the problem of low utilization ratio of functional ligands in polymer adsorbents.

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Large-area self-standing thin film of porous hydrogen-bonded organic framework for efficient uranium extraction from seawater

Cited by 41 publications

References 86 publications

Multifunctional Porous Hydrogen-Bonded Organic Frameworks: Current Status and Future Perspectives

Multifunctional Porous Hydrogen-Bonded Organic Frameworks: Current Status and Future Perspectives

Protocol for the synthesis and use of U selective hydrogen-bonded organic framework to prepare large-area free-standing thin film

Amidoxime‐based Star Polymer Adsorbent with Ultra‐High Uranyl Affinity for Extremely Fast Uranium Extraction from Natural Seawater

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