Recent advances in the utilization of covalent organic frameworks (COFs) as electrode materials for supercapacitors

Chemical Science, Год журнала: 2023, Номер 14(47), С. 13601 - 13628

Опубликована: Янв. 1, 2023

This review summarizes the recent advances in electrode application of covalent organic frameworks (COFs) for supercapacitors, including design strategies from molecular scale to morphology control level and their device performance.

Язык: Английский

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Nanoscale Covalent Organic Framework with Staggered Stacking of Phthalocyanines for Mitochondria-Targeted Photodynamic Therapy

Journal of the American Chemical Society, Год журнала: 2023, Номер 146(1), С. 849 - 857

Опубликована: Дек. 22, 2023

Phthalocyanine photosensitizers (PSs) have shown promise in fluorescence imaging and photodynamic therapy (PDT) of malignant tumors, but their practical application is limited by the aggregation-induced quenching (AIQ) inherent photobleaching PSs. Herein, we report synthesis a two-dimensional nanoscale covalent organic framework (nCOF) with staggered (AB) stacking zinc-phthalocyanines (ZnPc), ZnPc-PI, for mitochondria-targeted PDT. ZnPc-PI isolates confines ZnPc PSs rigid nCOF to reduce AIQ, improve photostability, enhance cellular uptake, increase level reactive oxygen species (ROS) generation via mitochondrial targeting. shows efficient tumor accumulation, which allowed precise nanoparticle tracking. With high uptake intrinsic targeting, enhanced ROS generation, exhibits potent PDT efficacy >95% growth inhibition on two murine colon cancer models without causing side effects.

Язык: Английский

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Polycrystalline covalent organic frameworks

Materials Today, Год журнала: 2023, Номер 71, С. 91 - 107

Опубликована: Ноя. 23, 2023

Язык: Английский

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A Spirobifluorene-Based Covalent Organic Framework for Dual Photoredox and Nickel Catalysis

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(46), С. 25074 - 25079

Опубликована: Ноя. 7, 2023

Covalent organic frameworks (COFs) have emerged as tunable, crystalline, and porous functional materials, but their application in photocatalysis has been limited by rapid excited-state quenching. Herein, we report the first example of dual photoredox/nickel catalysis an sp2 carbon-conjugated spirobifluorene-based COF. Constructed from spirobifluorene nickel-bipyridine linkers, NiSCN COF adopted a two-dimensional structure with staggered stacking. Under light irradiation, catalyzed amination etherification/esterification reactions aryl halides through photoredox mechanism, catalytic efficiency more than 23-fold higher that its homogeneous control. was used five consecutive without significant loss activity.

Язык: Английский

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Thermally Induced Persistent Covalent-Organic Frameworks Radicals

ACS Nano, Год журнала: 2023, Номер 17(23), С. 23903 - 23912

Опубликована: Ноя. 28, 2023

Persistent covalent-organic framework (COF) radicals hold important applications in magnetics and spintronics; however, their facile synthesis remains a daunting challenge. Here, three p-phenylenediacetonitrile-based COFs (named CityU-4, CityU-5, CityU-6) were synthesized. Upon heat treatment (250 °C for CityU-4 CityU-5 or 220 CityU-6), these frameworks brought into persistent radical forms (no obvious changes after at least one year), together with several observable factors, including color changes, red-shifted absorption, the appearance of electron spin resonance (ESR) signals, detectable magnetic susceptibility. The theoretical simulation suggests that treatment, lower total energy nonzero density are two main factors to guarantee polarized distributions. This work provides an efficient method preparation COF promising potentials.

Язык: Английский

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Supramolecular channels via crown ether functionalized covalent organic frameworks for boosting polysulfides conversion in Li−S batteries

Energy storage materials, Год журнала: 2023, Номер 65, С. 103143 - 103143

Опубликована: Дек. 17, 2023

Язык: Английский

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Tetrazine‐Linked Covalent Organic Frameworks With Acid Sensing and Photocatalytic Activity

Advanced Materials, Год журнала: 2023, Номер 36(14)

Опубликована: Дек. 23, 2023

Abstract The first synthesis and comprehensive characterization of two vinyl tetrazine‐linked covalent organic frameworks (COF), TA‐COF‐1 TA‐COF‐2, are reported. These materials exhibit high crystallinity specific surface areas 1323 1114 m 2 g −1 . COFs demonstrate favorable band positions narrow gaps suitable for light‐driven applications. advantages enable TA‐COFs to act as reusable metal‐free photocatalysts in the arylboronic acids oxidation light‐induced coupling benzylamines. In addition, these show acid sensing capabilities, exhibiting visible reversible color changes upon exposure HCl solution, vapor, NH 3 vapor. Further, outperform a wide range previously reported COF photocathodes. tetrazine linker skeleton represents significant advancement field synthesis, enhancing separation efficiency charge carriers during photoreaction contributing their photocathodic properties. can also degrade 5‐nitro‐1,2,4‐triazol‐3‐one (NTO), an insensitive explosive present industrial wastewater, 20 min sunlight‐driven photocatalytic process; thus, revealing dual functionality protonated both photodegradation Brønsted catalysts. This pioneering work opens new avenues harnessing potential COF‐based materials, facilitating advances catalysis, sensing, other related fields.

Язык: Английский

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A Dithiin‐Linked Covalent Organic Polymer for Ultrahigh Capacity Half‐Cell and Symmetric Full‐Cell Sodium‐Ion Batteries

Advanced Science, Год журнала: 2023, Номер 10(32)

Опубликована: Сен. 25, 2023

Abstract Sodium ion‐batteries (SIBs) are considered as a class of promising alternatives to lithium‐ion batteries (LIBs) overcome their drawbacks limited sources and safety problems. However, the lack high‐performance electrode materials hinders wide‐range commercialization SIBs. Comparing inorganic counterparts, organic materials, which benefitted from flexibly designable structures, low cost, environmental friendliness, high theoretical gravimetric capacities, should be prior choice. Here, covalent polymer (COP) based material (denoted CityU‐9) is designed synthesized by integrating multiple redox motifs (benzoquinone thioether), improved conductivity (sulfur induction), intrinsic insolubility (rigid skeleton). The half‐cell SIBs exhibit ultrahigh specific capacity 1009 mAh g −1 nearly no drop after 650 cycles. first all‐COP symmetric full‐cell shows 90 excellent rate capability. This work can extend selection redox‐active moieties provide rational design strategy novel materials.

Язык: Английский

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Transparent, Self-Healing, and Defogging Wearable Devices Enabled by Plasmonic Silver Nanoparticle-Embedded Covalent–Organic Framework Nanosheets

ACS Materials Letters, Год журнала: 2024, Номер 6(2), С. 648 - 655

Опубликована: Янв. 22, 2024

The development of transparent wearable devices capable self-healing and efficient fog removal is great significance. In this study, we have realized the fabrication a composite film exhibiting remarkable transparency along with light-triggered healing defogging capabilities. This was achieved by integrating plasmonic silver nanoparticle (AgNPs) embedded covalent–organic framework (COF) nanosheets, denoted as AgNPs/CONs, into waterborne elastic polyurethane (PU) matrix. Due to synergistic effect between AgNPs high properties COF nanosheets excellent photothermal characteristics, resulting film, even an ultralow loading AgNPs/CONs (0.15 wt %), demonstrate rapid temperature increase 80 °C upon exposure 500 mW cm–2 near-infrared (NIR) light irradiation for 12 s. Simultaneously, it maintains optical transmittance 96.2% at thin thickness 20 μm extremely low (0.08 %). localized elevation effectively eliminates surface promotes mechanical damage within achieving efficiency exceeding 98%. Our findings represent significant advancement in design photothermally active materials based on COFs, opening up new prospects next-generation electronic applications.

Язык: Английский

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Recent progress in covalent organic frameworks for flexible electronic devices

FlexMat., Год журнала: 2024, Номер 1(2), С. 160 - 172

Опубликована: Июнь 24, 2024

Abstract Covalent organic frameworks (COFs) are porous materials with good crystallinity, highly ordered stacking, tunable channels, and diverse functional groups that have been demonstrated to show great potential applications in flexible electronic devices, including energy storage devices (batteries supercapacitors), memristors sensors. Although research progress on the usage of COFs as active elements electronics has witnessed, summary this direction is rare. Thus, it right time write a review COFs‐based electronics. In review, we will first discuss different synthesis strategies prepare COF materials. Then, summarized. Finally, future performance improvement development directions field briefly outlined. This could provide basic concepts some guidelines stimulate novel devices.

Язык: Английский

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