JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Di-Ming Chen,Han-Dong Qiao,Pei-Feng Wang,Zi-Jun Zhao,Shao-Ming Fang
In this study, a porous Ni-MOF formulated as {(H 2 NMe 2 )[Ni 3 (μ 3 OH)(TPT)(TZB) 3 ](H 2 O) 6 (DMA) 7 } n (TZB = 4-(1H-tetrazol-5-yl)benzoate, TPT = 2,4,6-tri(4-pyridyl)-1,3,5-triazine, and DMA = N,N-dimethylacetamide) was prepared and its C 2 H 2 and CO 2 adsorption performances were systemically studied both experimentally and computationally. The structural analysis by single crystal X-ray diffraction studies reveals that the prepared Ni-MOF crystallizes in the space group P6 3 mc and features a porous pacs -type network composed of trigonal bipyramidal and octahedral cages. The activated Ni-MOF (Ni-MOF-a) shows a high C 2 H 2 uptake capacity of 157 cm 3 /g with a moderate C 2 H 2 /CO 2 IAST selectivity of 3.3 at 298 K and 1 bar. More importantly, Ni-MOF-a shows a low adsorption heat for C 2 H 2 ranging from 24.6 to 27.1 kJ/mol at 298 K with a high separation potential of 2.85 mol/kg. In the computational simulation section, six sets of point charge derived from different approaches (Qeq, Mulliken, PACMOF, mCBAC, Mepoml, PACMAN) and two different force-fields (UFF and Dreiding) were used to calculate the C 2 H 2 and CO 2 adsorption isotherms and then compared with the experimental values. Our results reveal that great care should be taken in the selection of point charges and force fields, and the unsuitable combinations might result in an inappropriate C 2 H 2 /CO 2 selectivity which is against the experimental results.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Haonan Xue,Haihong Xia,Hui Li,Fei Ge,Wenlin Xu,Xiaohui Yang,Minghao Zhou
The conversion of abundant lignin was of great significance for the utilization of biomass resources. In this study, lignin sulfonate (LS) was selected as a carbon-based support, which was successfully introduced into the NiCo-MOF structure. A series of lignin and MOF hybrid catalysts (Ni n Co-MOF-LS) with varying metal ratios of Ni and Co were synthesized via the hydrothermal method. Subsequently, the catalytic hydrogenolysis of lignin-derived dimers was conducted over a range of Ni n Co-MOF-LS, with the impact of calcination temperature and lignin addition in the catalysts taken into account. The selective conversion of benzyl phenyl ether (BPE) and other lignin dimers was achieved over the Ni n Co-MOF-LS catalyst with isopropanol serving as the hydrogen donor solvent in a nitrogen atmosphere. The Ni/Co metal ratio and calcination temperature were found to have a significant impact on the catalytic performance. Through a comprehensive investigation of various reaction parameters, including temperature, pressure, reaction time, and reaction solvent, it was determined that the catalyst exhibited excellent catalytic activity in the selective hydrogenolysis of BPE to cycloalkane and cyclohexanol. The optimal reaction conditions (240 °C, 4 h, 3 MPa N 2 ) were found to be conducive to the effective conversion of BPE into methylcyclohexane and cyclohexanol. The combination of lignin and metal-organic framework represented a novel approach to the utilization of lignin resources and the upgrading of biomass-derived chemicals.
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JOURNAL OF CONTROLLED RELEASE
·
2025
·
IF 11.5
Lifang Chen,Yao Wang,Xiuqing Huang,Lifang Han,Zhengwei Huang,Ling Guo,Kai Chen,Guoxin Tan
The occurrence of bacterial keratitis (BK) presents a significant threat to ocular health, often leading to visual impairment. Currently, conventional antibiotic therapies tend to promote bacterial resistance and lack biocompatibility. Therefore, it is of great significance to develop an alternative product with safe and efficient antimicrobial properties. In this study, we developed a novel smart pH-responsive nano-antibacterial system (PM/Ag-Ce6@ZIF-8) based on a metal-organic framework (MOF), enabling specific bacterial targeting and photodynamic therapy. By utilizing bacteria-specific maltodextrin transport pathway, the intelligent nano-antibacterial modified with maltotriose can accurately discriminate between bacterial infection and normal tissue, specifically target the site of infection, and efficiently accumulate at the infection site to enhance safety and efficacy. Furthermore, the incorporation of silver nanoparticles enhances the effectiveness of MOF photodynamic therapy by effectively eradicating bacteria. The nano-antibacterial system exhibits potent inhibition of biofilm formation as well as antibacterial activity while demonstrating excellent in vitro and in vivo biocompatibility. In an animal model of bacterial keratitis, PM/Ag-Ce6@ZIF-8 exhibits superior antibacterial activity compared to Levofloxacin (LVFX) eye drops, significantly improving therapeutic outcomes for bacterial keratitis in mice. Hence, this intelligent nano-antibacterial platform holds promising potential for clinical applications in treating keratitis.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
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IF 7.7
Weining Liu,Xiaoyang Liu,Xi Tan,Mingyang Zhao,Zhao Liu,Ming Yi,Qi Ding,Yaqian Ren,Hairong Li
Triethylamine (TEA) presents considerable threats to public health and production safety because of its toxic and explosive nature, highlighting the urgent need to develop high-performance sensing materials. Traditionally, gas-sensing elements based on p-type metal oxide semiconductor (MOS) have been hindered by their intrinsically low carrier mobility, resulting in performance inferior to n-type MOS. Herein, we successfully constructed Cr 2 O 3 /TiO 2 -X (MCT-X) heterostructures through a in-situ MOF/MXene-derived strategy. The abundant porous nature, along with its increased specific surface area and numerous surface defects, facilitated the interaction between TEA and active centers. Meanwhile, the tightly coupled p-n heterostructures not only enabled rapid carrier migration but also exhibited a rare electron backflow effect. The multidimensional synergistic effects conferred upon MCT-X with excellent sensing properties. The optimal MCT-2 exhibited an outstanding response of 450.01 for TEA (100 ppm, 134 °C), along with superior selectivity, linearity, and stability. Density Functional Theory (DFT) calculations reveal in-depth explanation of the anisotropic charge transport mechanism induced by differences in crystal planes contacts and the sensitization mechanism of the heterostructure. This distinctive synthesis approach, combined with comprehensive mechanistic analysis, offers a strategy for the design of advanced TEA sensing materials.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 6
·e7504
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IF 3.7
Qiuyun Zhang,Mengmeng Hu,Fan Chen,Jiao Lei,Jingsong Cheng,Juan Ma,Yongting Zhao,Yutao Zhang
Development of an energy-efficient and economical route is necessary for society to synthesize green biofuels. Herein, cobalt-doped tungstophosphoric acid (Co-HPW) is in-situ impregnated in the Zr-based metal–organic framework (MOF-801) forming composite of Co-HPW/MOF-801. The chemical composition, morphology, and acidic sites of the Co-HPW/MOF-801 composite were analyzed through x-ray diffractometer (XRD), Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy-dispersive x-ray spectroscopy (EDS), thermogravimetric analysis (TG), N 2 physisorption, ammonia temperature-programmed desorption (NH 3 -TPD), pyridine-adsorbed infrared spectra (Py-FTIR), and x-ray photoelectron spectroscopy (XPS). The catalytic performance of the as-synthesized catalyst was explored to catalyze esterification of lauric acid (LA) with methanol. The outcomes revealed that the Co-HPW/MOF-801 nanocatalyst achieved a high conversion of 86.3% under the optimized reaction condition (catalyst amount of 0.15 g, temperature of 100°C, time of 4 h, and methanol/LA molar ratio of 20:1). The excellent catalytical performance is mainly due to the large BET surface area, exposure of more active centers from available pore structure, and simultaneous possession of high Lewis and Brønsted acidity. Furthermore, the kinetic study revealed that the reaction process was kinetically controlled and the activation energy was found to be 42.1 kJ/mol. The results suggest that the synthesized Co-HPW/MOF-801 nanocatalyst is an environmental greenness, low cost, and suitable for easy scale-up for the production of biofuels.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Longying Duan,Ting Cheng,Yanyue Zhu,Yuping Wang,Yanxin Gao,Jinhong Bi
Environmental concerns are driving the development of eco-friendly and effective methods for contaminant monitoring and remediation. In this study, a lanthanide porphyrin-based MOF with dual fluorescence sensing and photocatalytic properties was synthesized and applied for the detection and combined removal of Cr(VI) and ciprofloxacin (CIP). Using different excitation wavelengths, the material exhibited selective detection of Cr(VI) via fluorescence quenching and CIP through fluorescence enhancement. The variation in color intensity of Tb-MOF on 3D EEM spectra enabled simultaneous detection of both contaminants. Additionally, Tb-MOF demonstrated a synergistic removal effect, achieving over 95% removal rates of Cr(VI) and CIP within 90 min, with consistent sensing and catalytic performance across four cycles. Mechanistic investigations revealed that (i) strong coordination between Tb3+ and CIP altered the surface potential of Tb-MOF, enhancing Cr(VI) adsorption; (ii) as an efficient electron acceptor, Cr(VI) promoted electron transfer and its reduction to Cr(III); and (iii) superoxide radicals generated via a type I mechanism played a key role in CIP degradation. This research underscores the potential of Tb-MOF as a multifunctional platform for simultaneous detection and synergistic remediation of mixed pollutants.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wenxue Wang,Hui Cao,Rong Fan,Ming Zhu,Rui Zhang,Pengtao Liu
Metal-organic frameworks (MOFs) are porous hybrid materials made of metal and organic linkers. Combining MOFs with polymers enhances their performance and addresses the issue of low stability. In this study, a uniform nanoscale Eu(III)-based metal-organic framework (Eu-MOF) was synthesized and grown in situ on TEMPO(2,2,6,6-tetramethylpiperidinyl-1-oxide)-oxidized cellulose nanofibrils (TOCNF), resulting in the formation of Eu-MOF@TOCNF fluorescence films through vacuum filtration. These films exhibited favorable mechanical properties, high transmittance, and stable fluorescence characteristics within the pH range of 3–11. The film produced the characteristic emission peak of Eu 3+ , recognized the selective quenching of Fe 3+ within 0–100μM, and displayed an inverse relationship between fluorescence intensity at 616 nm and Fe 3+ concentration. This approach holds significant promise for Fe 3+ detection in solutions and offers a novel strategy for developing highly efficient optical sensors based on fluorescence specificity.
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Small
·
2025
·
IF 12.1
Pengwei Tan,Shuyang Shen,Ying Zheng,Yushu Tang,Yuanyuan Luo,Zheng Zhang,Dong Men,Guotao Duan
Electrochemical transistor (ECT) biosensors can achieve ultrahigh sensitivity, while keeping challenges for large biomolecules due to their sizes over the thickness of the electric double layer (EDL) causing a failure of sensing reaction. Here, wafer-level Ni/Fe-metal-organic framework (MOF) films and corresponding ECT biosensors are fabricated for the detection of coronavirus nucleocapsid protein, which realize an ultralow detection limit of 1 fg mL −1 and a wide detection range of 1 fg mL −1 to 100 pg mL −1 . A 3D Debye space, originating from the unique stacking structure of nanosheets and nanoparticles in Ni/Fe-MOF film, is proposed to explain such ultrahigh sensitivity, which ensures the immune-binding and sensing process of the nucleocapsid protein large molecules located in the effective EDL space. Moreover, an appropriate Ni/Fe molar ratio is optimized to enhance the transmission of carriers, thus improving the signal-to-noise ratio and the sensing response. The Ni/Fe-MOF-ECT biosensors will find applications in highly sensitive detection for large biomolecules, and the 3D Debye space may be a design model for constructing other biosensors.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yu-Xuan Zheng,Xuwen Wu,Wei-Guang Yang,Bai-Xue Li,Kejing Gao,Jingsheng Zhou,Yunfang Liu,Dongzhi Yang
Radioactive nuclides and highly toxic organophosphates are typical deadly threats. Materials with the function of radioactive substances adsorption and organophosphates degradation provide double protection. Herein, dual-functional polyamide (PA)/polyethyleneimine (PEI)@Zr-MOF fiber composite membranes, fabricated by in-situ solvothermal growth of Zr-MOF on PA/PEI electrospun fiber membranes, are designed for protection against two typical model compounds of iodine and dimethyl 4-nitrophenyl phosphate (DMNP). Benefiting from the unique core-sheath structure composed of inner nitrogen-rich fibers and outer porous Zr-MOF, the composite membranes rapidly enrich iodine through abundant active sites of the outer sheath and form complexes with the amine of inner PEI, exhibiting a highly competitive adsorption capacity of 609 mg g −1 . Moreover, it can adsorb and degrade DMNP with the synergy of PEI component and Zr-MOF, achieving an 80 % removal of DMNP within 7 min without any additional co-catalyst. This work provides a feasible strategy to fabricate dual-functional materials that protect against radioactive and organophosphorus contaminants.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 12
·1-13
·
IF 5.3
Wang Xue,Zhao Zixuan,An Long,Wang Tianxiang,Yang Xiaojing,Shan Jiajia
An unlabeled electrochemical sensing strategy based on electroactive copper-centered metal–organic framework (Cu-MOF) film coupled with multiwalled carbon nanotubes (MWCNTs) was proposed for the rapid assessment of nanoplastic concentration. The sensing interface was fabricated via the electro-deposition of Cu-MOF on the pre-modified MWCNTs using the cathodic reduction method. The exposed copper active sites in Cu-MOF showed excellent electrochemical activity, which was further enhanced due to rapid electron transfer induced by highly conductive MWCNTs. Through the adsorption functionality of Cu-MOF film towards polystyrene (PS) nanoplastics, the rapid recognition for nanoplastics in aqueous solution was achieved, thereby causing the inhibition of the current response. The results showed a robust dependence of the inhibition rate on the PS mass concentration. The proposed detection method was used for the quantitative determination of PS nanoplastics with the sizes of 100 nm, 500 nm, and 1 μm. The applicability of this electrochemical sensing platform was successfully validated in real-world water sample analysis. Graphical abstract
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Wenqian Zhang,Shengming Zhang,Minghao He,Weixian Hu,Wenhao Han,Kangkang Zha,Qian Feng,Guohui Liu,Yanli Zhao,Bobin Mi
Postmenopausal bone loss due to estrogen deficiency necessitates effective therapeutic strategies. Our study explores targeting macrophage Aurora A kinase to mitigate bone loss. Aurora A kinase phosphorylation is observed being increased in bone marrow-derived macrophages (BMDMs) from ovariectomy (OVX) mice, along with a reduction in programmed death-ligand 1 (PD-L1) expression. Detailed analysis reveals that PD-L1 plays an immunomodulatory role by lowering the ratio of T helper 17 cells and regulatory T cells. The metabolic shift toward glycolysis through transcriptome sequencing, induced by Aurora A kinase inhibition, is essential for PD-L1 expression in BMDMs. The interaction between Aurora A kinase and cytochrome C oxidase subunit 5B is found to enhance PD-L1 expression. To apply these findings therapeutically, a multifunctional system is developed using a Nickel-metal organic framework combined with bisphosphonate and MLN8237 (BP@Ni-MOF/MLN8237). This system targets bone tissues through bisphosphonate and effectively delivers MLN8237 to macrophages, promoting PD-L1 expression for a favorable immune environment. Moreover, this system exhibits an obvious angiogenic effect. The present study highlights the crucial roles of macrophage Aurora A kinase and PD-L1 in maintaining bone homeostasis as well as the angiogenesis effect by Ni-MOF engineered system, presenting a promising therapeutic approach to prevent postmenopausal bone loss.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chen Wang,Xing-Jing Zhang,Li−Na Zhao,Ting Zhang,Feng-Ying Bai,Li-Xian Sun,Yong-Heng Xing
The abuse and excessive discharge of organic pollutants such as nitroaromatic compounds (NACs) have become a hot topic of concern for all humanity and society, and the development of fast, effective, and targeted technical means for detecting NACs also faces many challenges. Here, we reported a strontium-based metal–organic framework (MOF) {[Sr2(tcbpe)(H2O)4]}n (Sr-tcbpe), in which tcbpe represents deprotonated 4′,4‴,4″‴,4‴‴-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′biphenyl]-4-carboxylic acid)). In Sr-tcbpe, Sr–O polyhedron and deprotonated tcbpe4– ligand have a staggered connection to form a self-assembled three-dimensional network structure. In addition, it is found that Sr-tcbpe undergoes no luminescent color change when grinding under solvent protection, while mechanochromic fluorescence behavior is observed when grinding directly, leading to luminescent color changes from cyan to green (Sr-tcbpe-G). Additionally, Sr-tcbpe and Sr-tcbpe-G could selectively detect PNP, DNP, and TNP, and Sr-tcbpe achieves visual fluorescence sensing detection toward TNP at a limit of detection as low as 2.25 μM. Moreover, during the detection process, unexpectedly, TNP exhibits a selective etching effect on Sr-tcbpe, which could drill nano holes with different sizes on the surface area of MOF materials to a certain extent, achieving the conversion of chemical energy to mechanical energy. In addition, the successful preparation of a portable sensor Sr-tcbpe@gypsum block provides a platform for the perfect combination of mechanochromic fluorescence behavior and visualization detection toward TNP. It lays the foundation for the practical application of MOF materials in daily life.
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