Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides

Li, Yang; Guo, Xiaomei; Li, Xiaofeng; Zhang, Meicheng; Jia, Zhimin; Ruan, Wenquan; Yin, Tian; Li, Shoujian; Ma, Lijian

doi:10.1002/ange.201916360

Cited by 32 publications

(16 citation statements)

References 65 publications

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“…[38][39][40][41] Benefiting from structural diversity, permanent porosity, and excellent stability, COFs have been developed for many applications. [42][43][44][45][46][47][48] When conferred with charged moieties on the skeleton or sidechain attachments, [49][50][51] COFs exhibit potential as excellent ion-exchange adsorbents for TcO 4 À /ReO 4…”

Section: Llmentioning

confidence: 99%

Radiation Controllable Synthesis of Robust Covalent Organic Framework Conjugates for Efficient Dynamic Column Extraction of 99TcO4−

Wang

Xie²,

Lan

et al. 2020

Chem

127

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Anion-scavenging materials tailored for 99 TcO 4 À trapping are urgently needed for both nuclear-related environmental remediation and management of spent nuclear fuel. For the first time, we report here an ultra-robust imidazolium-decorated covalent organic framework (COF) conjugate fabricated by an ionizing radiation strategy, for efficient capture of 99 TcO 4À . The charged imidazolium moieties are controllably anchored into the channel of the COF by simply adjusting the g-ray dose, thereby leading to tunable ReO 4 À uptake up to 952 mg g À1 with high selectivity and fast kinetics. More importantly, the high porosity and ultra-robust nanofiber structure of the COFs make them ideal packing materials for dynamic column experiments. >99.98% ReO 4 À /TcO 4 À can be efficiently separated and re-collected, even after four adsorptiondesorption cycles, ranking a new record of the elimination rate for ReO 4 À adsorption. The performance of these materials suggests attractive opportunities in practical applications for TcO 4 À removal from the environment and nuclear waste.

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Section: Llmentioning

confidence: 99%

Radiation Controllable Synthesis of Robust Covalent Organic Framework Conjugates for Efficient Dynamic Column Extraction of 99TcO4−

Wang

Xie²,

Lan

et al. 2020

Chem

127

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“…The results are well consistent with the fact that hydroquinone is oxidized by uranyl ions to form a benzoquinone structure. 248 Wang et al. 40 simulated Hg interaction with Ag NPs@COF-LZU1.…”

Section: Mechanism Analysis Of Removal Of Pollutants By Cof-based Materialsmentioning

confidence: 99%

“…Furthermore, the spin density of uranium atom and important bond lengths (Å) are also shown in this figure. 248 (B) MD simulations on the adsorption of 99 TcO 4 − anions into SCU-COF-1. (a) The initial configuration for MD simulations.…”

Section: Mechanism Analysis Of Removal Of Pollutants By Cof-based Materialsmentioning

confidence: 99%

Orderly Porous Covalent Organic Frameworks-based Materials: Superior Adsorbents for Pollutants Removal from Aqueous Solutions

et al. 2021

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Summary Covalent organic frameworks (COFs) are a new type of crystalline porous polymers known for chemical stability, excellent structural regularity, robust framework, and inherent porosity, making them promising materials for capturing various types of pollutants from aqueous solutions. This review thoroughly presents the recent progress and advances of COFs and COF-based materials as superior adsorbents for the efficient removal of toxic heavy metal ions, radionuclides, and organic pollutants. Information about the interaction mechanisms between various pollutants and COF-based materials are summarized from the macroscopic and microscopic standpoints, including batch experiments, theoretical calculations, and advanced spectroscopy analysis. The adsorption properties of various COF-based materials are assessed and compared with other widely used adsorbents. Several commonly used strategies to enhance COF-based materials’ adsorption performance and the relationship between structural property and sorption ability are also discussed. Finally, a summary and perspective on the opportunities and challenges of COFs and COF-based materials are proposed to provide some inspiring information on designing and fabricating COFs and COF-based materials for environmental pollution management.

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“…Covalent organic frameworks (COFs) have emerged as an ew class of 2D crystalline porous materials with unique designability with respect to topology diagram, pore environments,c hemical structure and functionalities.C OFs have been investigated into multifarious applications of gas adsorption and separation, [29][30][31][32] energy storage, [33][34][35][36] chemical sensors, [37][38][39] proton or ion conduction, [40][41][42][43] catalysis, [44][45][46][47][48] and some promising semiconductor devices. [49][50][51][52] Unfortunately, the research on nonvolatile resistive switching memory devices based on 2D COFs is still in its infancy.…”

Section: Introductionmentioning

confidence: 99%

Towards High‐Performance Resistive Switching Behavior through Embedding a D‐A System into 2D Imine‐Linked Covalent Organic Frameworks

Dong

et al. 2021

Angewandte Chemie

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Developing new materials for the fabrication of resistive random-access memory is of great significance in this period of big data. Herein, we present anovel design strategy of embedding donor (D) and acceptor (A) fragments into iminelinked frameworks to construct resistive switching covalent organic frameworks (COFs) for high-performance memristors.T wo D-A-type two-dimensional COFs, COF-BT-TT and COF-TT-TVT,were designed and synthesized using aconventional solvothermal approach,a nd high-quality thin films of these materials deposited on ITOs ubstrate exhibited great potential as an active layer for memristors.R ewritable memristors based on 100 nm thick COF-TT-BT and COF-TT-TVT films showed ah igh ON/OFF current ratio (ca. 10 5 and 10 4 )a nd low driving voltage (1.30 and 1.60 V). The cycle period and retention time for COF-TT-BT-based rewritable devices were as high as 319 cycles and 3.3 10 4 sataconstant voltage of 0.1 V( 160 cycles and 1.2 10 4 sf or the COF-TT-TVT memristor).

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Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides

Cited by 32 publications

References 65 publications

Radiation Controllable Synthesis of Robust Covalent Organic Framework Conjugates for Efficient Dynamic Column Extraction of 99TcO4−

Radiation Controllable Synthesis of Robust Covalent Organic Framework Conjugates for Efficient Dynamic Column Extraction of 99TcO4−

Orderly Porous Covalent Organic Frameworks-based Materials: Superior Adsorbents for Pollutants Removal from Aqueous Solutions

Towards High‐Performance Resistive Switching Behavior through Embedding a D‐A System into 2D Imine‐Linked Covalent Organic Frameworks

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