Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers

Zhang, Fan; Wei, Shice; Wei, Weiwei; Zou, Jiang; Wu, Dongqing; Bi, Shuai

doi:10.1016/j.scib.2020.05.033

Cited by 69 publications

(54 citation statements)

References 47 publications

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“…As a proof of concept, using a poor donor, 2,4,6-tris(4-formylphenyl)-1,3,5-triazine (TFPT), olefin-linked COFs TFPT–TBTN and TFPT–TMT were synthesized as examples of weak-ICT and no-ICT, respectively (Figure ). Among the eight designed COFs (Figure ), two of them (TFPB–TMT and TFPT–TMT) have already been synthesized by other researchers for photocatalytic hydrogen production, oxygen reduction, and white light-emitting diodes. ,,,, Another two COFs (TFPB–TBTN and TFPT–TBTN) were our previous work for uranium extraction . These four COFs herein (TFPB–TMT, TFPT–TMT, TFPB–TBTN, and TFPT–TBTN) were employed for comparison.…”

Section: Results and Discussionmentioning

confidence: 99%

Arousing Electrochemiluminescence Out of Non-Electroluminescent Monomers within Covalent Organic Frameworks

Cui

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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Covalent organic frameworks (COFs) with stable long-range ordered arrangements are promising materials for organic optoelectronics. However, their electrochemiluminescence (ECL) from non-ECL active monomers has not been realized. Here, we report a design strategy for ECL-emitting COF family. The donors and acceptors co-crystallized and stacked into the highly aligned array of olefin-linked COFs, so that electrons can be transported freely. By this means, a tunable ECL is activated from non-ECL molecules with the maximum efficiency of 32.1% in water with the dissolved oxygen as an inner coreactant, and no additional noxious co-reactant is needed any more. Quantum chemistry calculations further demonstrate that this design reduces the COFs' band gaps and the overlap of electrons and holes in the excited state for better photoelectric properties and stronger ECL signals. This work exploits a basis to envisage the broad application potential of ECL−COFs for various biosensors and light-emitting display.

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Section: Results and Discussionmentioning

confidence: 99%

Arousing Electrochemiluminescence Out of Non-Electroluminescent Monomers within Covalent Organic Frameworks

Cui

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Furthermore, CMP-BT (180 kHz) only has subnanometer pores, which limit ionic diffusion into the bulk of the electrode. To overcome these problems and to achieve high-performance supercapacitors, we introduced CNTs as electron highways. , We also used a double-nozzle SNS system enabling the sequential layer-by-layer deposition of CMP-BT and CNTs to improve the conductivity and porosity instead of codeposition (Figures a and S38). As a result, the hybrid CMP-BT/CNT electrodes were prepared with a hierarchical porous morphology, which combined the intrinsic microporosity of CMP-BT and the extrinsic macroporosity of the CNTs.…”

Section: Resultsmentioning

confidence: 99%

Sono-Cavitation and Nebulization-Based Synthesis of Conjugated Microporous Polymers for Energy Storage Applications

Roh

Shin

Kim

et al. 2021

ACS Appl. Mater. Interfaces

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Conjugated microporous polymers (CMPs) are promising energy storage materials owing to their rigid and cross-linked microporous structures. However, the fabrication of nano- and microstructured CMP films for practical applications is currently limited by processing challenges. Herein, we report that combined sono-cavitation and nebulization synthesis (SNS) is an effective method for the synthesis of CMP films from a monomer precursor solution. Using the SNS, the scalable fabrication of microporous and redox-active CMP films can be achieved via the oxidative C–C coupling polymerization of the monomer precursor. Intriguingly, the ultrasonic frequency used during SNS strongly affects the synthesis of the CMP films, resulting in an approximately 30% improvement in reaction yields and ca. 1.3–1.7-times enhanced surface areas (336–542 m2/g) at a high ultrasonic frequency of 180 kHz compared to those at 120 kHz. Furthermore, we prepare highly conductive, three-dimensional porous electrodes [CMP/carbon nanotube (CNT)] by a layer-by-layer sequential deposition of CMP films and CNTs via SNS. Finally, an asymmetric supercapacitor comprising the CMP/CNT cathode and carbon anode shows a high specific capacitance of 477 F/g at 1 A/g with a wide working potential window (0–1.4 V) and robust cycling stability, exhibiting 94.4% retention after 10,000 cycles.

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“…On the contrary, vinylene-linked COFs displaying ultrahigh stability under extreme chemical conditions , and great π-electron delocalization overcome the limitations of imine-linked COFs. Vinyl-linked COFs have a fully conjugated structure and exhibit interesting semiconductor properties, such as adjustable band position, fast carrier separation capability, and excellent photocatalytic and electrochemical performance. − Recently, a series of vinylene-linked COFs (such as Tp-BDDA, sp 2 c-COF dpy , LZU-190) have been reported for reduction of CO 2 , water decomposition, and organic synthesis via utilization of visible light. However, the photocatalytic degradation of organic pollutants using vinyl-linked COFs has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

Band Gap Engineering in Vinylene-Linked Covalent Organic Frameworks for Enhanced Photocatalytic Degradation of Organic Contaminants and Disinfection of Bacteria

Chen

Cui

Liang

et al. 2021

ACS Appl. Bio Mater.

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Photocatalysis is regarded as one of the most promising technologies to remove organic contaminants. At present, most of the covalent organic frameworks (COFs) used as photocatalysts are connected by imine or borate bonds, which have relatively low stability and relatively poor π-delocalization. Herein, we report, for the first time, vinylene-linked COFs constructed by various diacetylene and triazine moieties for photocatalytic degradation of organic contaminants and disinfection of bacteria. The pioneering introduction of diacetylene moieties not only enhances conjugated π-electrons delocalization but also optimizes the electronic band structures that significantly improve photocatalytic activity. Therefore, the vinylene-bridged COFs have excellent photocatalytic activity with ultrahigh stability and great π-electron delocalization, thus exhibiting ultrafast photocatalytic degradation efficiency for phenol and norfloxacin (>96%, within 15 min). Our work provides a strong basis for the rational regulation of the chemical structure of COFs to enhance their photocatalytic activity, thus broadening the application of COFs in photocatalysis.

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Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers

Cited by 69 publications

References 47 publications

Arousing Electrochemiluminescence Out of Non-Electroluminescent Monomers within Covalent Organic Frameworks

Arousing Electrochemiluminescence Out of Non-Electroluminescent Monomers within Covalent Organic Frameworks

Sono-Cavitation and Nebulization-Based Synthesis of Conjugated Microporous Polymers for Energy Storage Applications

Band Gap Engineering in Vinylene-Linked Covalent Organic Frameworks for Enhanced Photocatalytic Degradation of Organic Contaminants and Disinfection of Bacteria

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