JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Yanying Dong,Xiaofang Zhang,Yonglin Wang,Liqiu Tang,Yingkui Yang
Engineering building blocks of covalent organic frameworks (COFs) with tailored active sites and microstructures is efficient in boosting capacitive energy storage. Herein we craft imine-linked COFs built from tri-arylamine knots and di-aldehyde linkers via a well-established Schiff-base condensation . The resulting COFs show enriched redox responses and diverse morphologies including nanoparticles , hollow spheres, and crystalline fibers by altering the knot planarity and the substitutes on linkers. It is disclosed that the coplanarity of building blocks and intramolecular H-bonding dominate the stacking modes of COFs, and accordingly their microstructures, and electrochemical performance. Among such COFs, a hydroquinone-enriched nanofiber-like COF delivers the highest specific capacitance of 235 F g −1 at 0.5 A g −1 , which outperforms the most COF-based electrodes reported previously, due to its high planarity, intramolecular H-bonding, ultrahigh specific surface area, and abundant electroactive moieties. This work may unlock an alternative approach to the modularization of pseudocapacitive COFs by enriching redox-active centers and tuning microstructures.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8161-8169
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IF 3.3
Shangjin Liu,Chunfeng Mao,Chenghan Yang,Pengda Hong,Min Zhu,Yuming Zhou,Yiwei Zhang
4-Nitrophenol (4-NP) usually exists in soil and groundwater, which causes great harm to the environment and human health. Removal of 4-nitrophenol has become the focus of research. Herein, a smart synthetic strategy of NH2-MIL-88B(Fe)@Au@Covalent Organic Frameworks (COFs) is proposed for the first time. NH2-MIL-88B(Fe)@Au@COFs are composed of NH2-MIL-88B(Fe) as the core and COFs as the shell with Au nanoparticles. Au nanoparticles in NH2-MIL-88B(Fe)@Au@COFs exhibit good dispersion and thermal stability due to amino group immobilization on NH2-MIL-88B(Fe). The core–shell structure, high thermal stability and highly dispersed active sites of NH2-MIL-88B(Fe)@Au@COFs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), and so on. To the best of our knowledge, 4-nitrophenol was reduced to 4-aminophenol using NH2-MIL-88B(Fe)@Au@COFs as the catalyst, NaBH4 as the reductant and 4-nitrophenol as the raw material at room temperature. The catalyst has high catalytic activity and can be used repeatedly for the reduction of 4-nitrophenol under the cooperation of Fe and Au electrons. In addition, the kinetics and mechanism of catalytic reduction were discussed in detail. Multi-functional materials constructed using metal organic frameworks (MOFs) and COFs provide a basis for the application and expansion of new porous materials.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhiying Fan,Yingdan Zhang,Ningning He,Yingdi Zou,Jie Zhang,Chan Deng,Meicheng Zhang,Lei Wang,Ning Liu,Yang Li,Lijian Ma
The study of isomerism phenomena in covalent organic frameworks (COFs), such as dimensional isomerism, interpenetration isomerism, and stacking isomerism, along with their influence on the properties of COFs, has become an intriguing research avenue in recent years. Nevertheless, the current techniques for synthesizing COF isomers predominantly rely on extensive trial and error, lacking efficient, target-driven synthetic methodologies. The development of synthetic protocols capable of selectively enhancing the crystallization of one COF isomer over another continues to pose a significant challenge, remaining an empirical process at present. In this work, through subtly designing with the same structure and different stacking modes, we elucidate how altering the sequence of hydroxyl site modifications on the monomer impacts dissolution, polymerization, and assembly processes during COF synthesis, thereby influencing the stacking modes of two kinds of hydrazine-linked COFs with reversed AA stacking and AA stacking structures. The quasi-in-situ PXRD analysis during methanol volatilization and the N 2 adsorption experiments revealed that the crystallinity and stability of the COFs prepared by the pre- and post-modified method are significantly different. These structural differences are further reflected in applications such as photocatalytic reduction of uranium and iodine adsorption. This work sheds light on the crucial role of non-covalent interactions in influencing and regulating the stability-crystallinity-functionality of COFs, offering valuable insights for future investigations.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Rui Wang,Mingjie Wei,Yong Wang
Covalent organic frameworks (COFs) has emerged as a highly promising platform material for the manufacturing of molecule-separating membranes. However, COF membranes are predominantly used in the separation of dyes from water or organic solvents and there are very few reports on COF-enabled membranes for desalination . In this work, the secondary growth approach based on unidirectional diffusion synthesis is developed to grow continuous thin films of a COF with an intrinsic pore size of 0.8 nm on macroporous substrates to prepare COF membranes for desalination. The amino-modified polymer microfiltration substrate is fixed in a diffusion cell to separate the oil phase containing the aldehyde precursor (1,3,5-triformylphloroglucinol, Tp) and the aqueous phase containing both the amino precursor (hydrazine, Hz) and the catalyst. Because of the immiscible bi-phase solutions and the high molar ratio of Hz to Tp, the unidirectional diffusion of Hz molecules in the pore channel of the substrate is achieved and the polycondensation between the two precursors occurs at the phase interface . The unidirectional diffusion synthesis is sequentially performed for two times and the secondary growth is essential to ensure the formation of a defect-free, continuous thin film of COF (TpHz) on the top surface of the substrate. Cladding COF coatings are also formed along the skeleton in the near-surface region of the substrate. Such an asymmetric structure ensures both a good permselectivity and a strong adhesion between the grown COF layers and the substrates. The continuous COF thin film grown on the substrates serves as the selective layer, and the COF membrane prepared under the optimized condition exhibits an appreciable Na 2 SO 4 rejection of 58.3% and a water permeance of 40.5 L∙m −2 ∙h −1 ∙MPa −1 which are ~ ten times higher than other membranes with similar rejections. This study not only demonstrates the potential of COFs in desalination but also showcases an efficient strategy to grow continuous thin films of COFs on porous substrates which are desired in diverse applications.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
LANGMUIR
·
2026
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IF 4.4
Yongxin Hu,Haitao Ji,Liangjun Li,Xiaoyu Mao,Changhua Li,Songlin He,Chuan Fu,Yi He
The development of high-performance anticorrosion coatings through sustainable methods is of critical importance. However, the practical applications of Ti3C2Tx MXene are often quite limited. This study proposes a fabrication strategy aimed at developing an intelligent, self-healing composite coating. Specifically, porous covalent organic frameworks (COFs) were grown in situ on amino-modified Ti3C2Tx nanosheets using a Lewis acid molten salt method combined with a room-temperature synthesis approach. This carrier possesses a high specific surface area (199.65m2·g–1), enabling the high loading of corrosion inhibitors (PESA/BTA). When this substance is added to water-based epoxy resin, the resulting coating establishes a “passive protection + active repair” mechanism. It is worth noting that at a pH of 2, the controlled-release agent reaches its maximum efficacy within 180 min. Electrochemical tests demonstrated outstanding durability, with the low-frequency impedance modulus (|Z|0.01 Hz) remaining at 3 × 108 Ω·cm2 after 60 days of exposure to 3.5 wt % NaCl. This value is 2 orders of magnitude higher than that of pure epoxy. Furthermore, the coating demonstrates rapid self-healing capabilities (impedance recovery to 5 × 105 Ω·cm2 within 72 h) and superior tribological properties (friction coefficient of 0.06). This study presents a scalable method for manufacturing durable MXene-based coatings.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Luyan Meng,Weiding Jin,Keqi Ye,Yinghua Yan,Chuan-Fan Ding,Kesang Li
A phosphorylated polyethyleneimine-functionalized magnetic covalent organic framework (mCOF-PEI-PO 3 -Ti 4+ ) was engineered for highly selective and efficient enrichment of phosphopeptides from complex biological samples. The nanocomposite was constructed by growing a vinyl-functionalized covalent organic framework on Fe 3 O 4 microspheres, followed by grafting of hyperbranched polyethyleneimine and subsequent phosphorylation to introduce a high-density Ti 4+ -chelating interface. By integrating immobilized metal ion affinity chromatography (IMAC) with the enhanced hydrophilicity and multi-site hydrogen-bonding capability of the phosphorylated PEI layer, the composite demonstrated outstanding enrichment performance. This included an ultralow detection limit (0.5 fmol), outstanding selectivity (1:2000), high loading capacity (50 mg·g −1 ), and excellent reusability (10 cycles). The material successfully enriched endogenous phosphopeptides from human saliva and serum. Furthermore, it enabled the comparative phosphoproteomic profiling of serum samples from colorectal cancer (CRC) patients, revealing a distinct CRC-associated phosphopeptide signature. Gene Ontology analysis indicated that the identified phosphoproteins were significantly enriched in lipid metabolism and receptor signaling pathways, whereas serine protease inhibitor activity was markedly downregulated in CRC samples. These findings suggest that dysregulated lipid metabolism may contribute to CRC progression through inflammatory modulation. This study establishes the mCOF-PEI-PO 3 -Ti 4+ composite as a robust and reliable platform for clinical phosphoproteomic analysis.
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DOI
高影响因子
ChemSusChem
·
2024
·Vol. 18
·期 7
·e202401046
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IF 7.5
Habib Ullah,Zakir Ullah,Zafar A. K. Khattak,Muhammad Tahir,Eunji Kang,Francis Verpoort,Hyun You Kim
Graphical Herein, we report a solvothermal synthesis of a hydrazone-linked covalent organic framework (COF) towards solvent-free cycloaddition reaction of CO 2 and epoxides at ambient pressure. This functionalized cobalt-doped COF works well for various aromatic substrates with electron-withdrawing or donating groups and internal epoxides with a high yield of >99 % and 100 % selectivity. Covalent organic frameworks (COFs) constitute an evolving class of permanently porous and ordered materials, and they have recently attracted increased interest due to their intriguing morphological features and numerous applications in gas storage, adsorption, and catalysis. However, their low aqueous stabilities and tedious syntheses generally hamper their use in heterogeneous catalysis. Nonetheless, a capable and water-stable heterogeneous catalytic system for coupling CO 2 /epoxides to generate industrially important cyclic carbonates is still of great interest. Herein, exceedingly water- and thermally stable 2D-cobalt-impregnated hydrazone-linked fibrous COFs are reported as a catalyst for CO 2 /epoxide coupling reactions at ambient pressure. The functionalized cobalt (Co)-doped COFs demonstrated excellent catalytic activities with the high TONs (80925) and TOFs (6466 h −1 ), outperforming reported heterogeneous catalysts for CO 2 /epoxide coupling at ambient pressure. We found that the Co 2+ ions within the COF matrix catalyze CO 2 cycloaddition through density functional theory calculations. We also confirmed the excellent structural stability and consistent activity of Co-doped COFs up to ten repeating cycles.
研究领域:
材料科学
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催化化学
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环境化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9
Ruifang Qi,Yue Zhao,Jinming Lei,Huixian Jia,Chenghong Feng
Metal-free covalent organic frameworks (COFs) often face a critical trade-off wherein high photocatalytic activity relies on complex, expensive designs while cost-effective alternatives lack efficiency and stability. To address these issues, a nitro-functionalized COF (COF-NO₂) was developed via a one-step condensation method for bisphenol A (BPA) degradation. The –NO₂ groups act as intramolecular electron traps, narrowing the bandgap and boosting charge separation. COF-NO₂ achieved 97.3% BPA degradation within 120 min ( k = 0.031 min −1 ) with over 85% efficiency across five consecutive cycles. Moreover, it exhibited high efficiency across a broad pH range (3−11) and showed broad-spectrum activity toward various bisphenols, including bisphenol S, bisphenol F, bisphenol C, and 4-chlorophenol. Quantitative structure–activity relationship analysis identified HOMO energy as the key descriptor governing degradation kinetics for bisphenols. In pretreated petrochemical wastewater, COF-NO₂ also attained over 75% BPA removal, demonstrating practical potential. This molecular design promoted ·O₂ − generation and selective bond cleavage in BPA, thereby enabling efficient mineralization and a 44% reduction in toxicity. A continuous-flow fluidized bed reactor was designed and achieved 97.4% BPA removal in 180 min through optimized light-flow coupling. Furthermore, low-cost g-C₃N 4 was introduced to integrate with highly active COF-NO₂, forming a composite that reduced material costs by 20% while maintaining over 80% degradation efficiency. This work presents a synergistic strategy combining molecular orbital engineering with heterojunction design, offering a feasible route to cost-effective and scalable metal-free COFs.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhihong Dong,Ying Zhu,Xuexi Zhang,Xinliang Zhang,Xueting Zhao,Jiefeng Pan
Covalent organic frameworks (COFs) are ideal materials for engineering molecular sieves membranes. Colloidal COFs play an important role in the preparation of defect-free COF membranes. Herein, we present the alkali-mediated approach to synthesize uncharged β -ketoenamine-linked COFs with high colloidal dispersibility that can serve as preferred membrane-forming materials. The colloidal β -ketoenamine-linked COFs are synthesized in the single solution-phase system and alkali is employed to regulate the reversible dynamic amine-aldehyde condensation process by directing the weak hydrogen bond networks. The colloidal COFs obtained from alkali-mediated synthesis exhibit promoted crystallinity and outstanding dispersity for membrane construction. Furthermore, the alkali-mediated synthesis approach is universal and suitable for synthesizing a series of colloidal β -ketoenamine-linked COFs without the limitations of charged monomers or frameworks. The colloidal COFs are further assembled into COF membranes by vacuum-assisted assembly. Thanks to the intrinsic regular pore structure of COFs, the COF membranes exhibit high permeability (58 L m −2 h −1 ·bar −1 ) and can achieve accurate screening of dye molecules. This work provides a facile and scalable synthesis strategy for uncharged colloidal COFs, and can be employed to develop COF membranes for on-demand molecule separation.
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高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
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2025
·
IF 6.8
Shuaiqi Feng,Yan Chen,Zhifang Liu,Shilei Ji,Qingpeng Wang
Dysregulated cholesterol accumulation promotes tumor growth and metastasis. Herein, a series of ciprofibrate platinum(IV) conjugates with cholesterol-inhibiting effects was developed, and the transferrin-modified nanodrug Tf-PEG-COFs@Pt(IV) was prepared using COFs as the carrier. The nanodrug exhibited potent antiproliferative and antimetastatic activities both in vitro and in vivo. The transferrin moiety significantly enhanced the tumor-targeting ability of the nanodrug. The platinum core induced serious DNA damage, leading to an increased expression of γ-H2AX and p53. Mitochondria-mediated apoptosis occurred via the Bcl-2/Bax/caspase-3 cascade. Notably, cholesterol accumulation was inhibited by the ciprofibrate ligand through promoting PPAR-α expression and further regulating the LDLR/ACAT1/ABCA1 signaling. The nanodrug effectively reversed the epithelial-mesenchymal transition by inhibiting the PI3K/AKT/mTOR pathway and reversing the hypoxic microenvironment. Furthermore, antitumor immunity was enhanced by elevating the density of CD3+ and CD8+ T cells and triggering macrophage polarization from the M2 to M1 phenotype in tumors.
研究领域:
肿瘤学
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药理学
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纳米医学
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分子生物学
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转化医学
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肿瘤代谢
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免疫肿瘤学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
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IF 6.578
Rui Wang,Xiansong Shi,Ankang Xiao,Wei Zhou,Yong Wang
Covalent organic frameworks (COFs) represent a new family of porous polymers with highly ordered two or three-dimensional channels. Although numerous studies have been focused on the design and synthesis of COF in the form of powders, the development of COF-based separation membranes is still hampered by the challenges of COF particles agglomeration and harsh synthetic conditions. In this work, interfacial polymerization (IP) directly performed on polymeric substrates as employed in the traditional IP process of polyamide (PA) membranes is developed for the synthesis of COF-based membranes. With the moderate reaction rate between monomer pairs in corresponding aqueous and organic solutions, a conformal growth of COF crystallites directly composited with the polysulfone (PSF) ultrafiltration substrates can be realized within 1 min. The synthesis parameters including reaction time and precursor concentrations are optimized, and thus-synthesized COF/PSF membrane presents a stable rejection to dye (Congo red) of 99.5% with a high water permeance of up to 50 L m −2 h −1 bar −1 , which is 2–10 times higher than that of many other membranes with similar rejection. This convenient IP process is expected to facilitate the up-scaling and real-world applications of COF-based membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chaoyan Zhang,Zhen Jiang,Peng Guo,Jianjun Song,Chuan Shi
The incorporation of inorganic electrolyte fillers into solid polymer electrolytes (SPEs) provides fast Li-ion transport channels, enhancing the ionic conductivity of SPEs. However, their insufficient specific surface area and poor compatibility with the polymer matrix impede the efficient diffusion of Li-ions from polymer into fillers, thereby limiting further advancements in SPEs. To address this challenge, we propose the utilization of covalent organic frameworks (COFs), TpPa-SO 3 Li, as fillers due to their rapid Li + transport properties, favorable compatibility with the polymer matrix, and ultra-high specific surface area. Validated by in-situ conductive AFM and DFT calculation, TpPa-SO 3 Li provides high-speed Li + transport pathways in the polyvinylidene fluoride-based SPEs (PVDF-TpPaSO 3 Li). This is attributed to their higher affinity energy of −1.93 eV compared to 1.34 eV of PVDF and their low Li + migrating barrier of 0.35 eV. Consequently, PVDF-TpPaSO 3 Li exhibits an outstanding ion conductivity of 1.93 mS cm −1 at 30 °C, an enhanced ion transfer number of 0.44, and a desirable mechanical strength of 13.5 MPa. The lithium-symmetrical batteries with PVDF-TpPaSO 3 Li exhibit stable Li stripping/plating cycling for 2500h at 60 °C and 0.1 mA cm −2 . Similarly, LiFePO 4 /Li batteries also display stable cycling with a retention in capacity of 93.83 % after 300 cycles at 0.5C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
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