Crystals
·
2018
·Vol. 8
·期 6
·250
·
IF 2.144
Xue-Qing Zhan,Xiao-Yan Yu,Fang-Chang Tsai,Ning Ma,Huan-Li Liu,Yu Han,Lei Xie,Tao Jiang,Dean Shi,Yan Xiong
Owing to their high surface area and porosity, metal-organic frameworks (MOFs) have been gradually employed for a myriad of applications ranging from sensing, pollutant adsorption, and drug delivery to environmental remediation and catalysis. Magnetic nanoparticles-metal-organic frameworks (MMOFs) hybrid materials can facilitate facile removal of MOFs from solutions. In this report, we report the synthesis of Fe3O4@UiO-66 by encapsulation and simulated the drug loading and release by studying the adsorption and release of AO7. Thus, we loaded these MMOFs with AO7 and found that they were able to trigger and control its release by simply applying an external magnetic field. The magnetic field heats the magnets in the MOF, which causes the load to burst from the framework.Keywords:magnetic MOFs;triggered release;targeted delivery;AO7
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 14
·e202300655
·
IF 2.2
Lingmei Zhang,Qian Zhao,Chao Feng,Guoning Zhang,Yucheng Wang,Yan Li,Wenjuan Sun,Hong Zhao
Graphical A cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n (SEU-1) has been successfully constructed and comprehensively characterized. The maximum specific capacitance of SEU-1 is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution, suggesting SEU-1 can be applied to high performance SC. Two-dimensional (2D) metal–organic frameworks (MOFs) have been a worldwide research interest due to their potential application in supercapacitors. Herein, a cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n , namely, SEU-1 ; H 2 ppza=3-(pyridin-4-yl)-1 H -pyrazole-5-carboxylic acid) has been synthesized via a one-step solvothermal method. Single X-ray diffraction analysis shows that the SEU-1 exhibits a (3,3,4)-connected 2D structure with a Schläfli symbol of (6 2 ⋅ 8)(6 3 )(6 4 ⋅ 8 ⋅ 10). Variable-temperature magnetic susceptibility data display that antiferromagnetic interactions between two Co II ions exist in SEU-1 . The supercapacitive performance has been evaluated in the three-electrode system. Its maximum specific capacitance is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution. These results demonstrate that SEU-1 is a good candidate for electrode material for electrochemical energy storage.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Jinyuan Hu,Boru Cai,Yaohui Wang,Zhengran Bian,Tianle Hou,Yanwei Sun
Amorphous metal–organic frameworks (MOFs) present significant potential for achieving high permeability and selectivity in separation applications. However, developing effective fabrication strategies for amorphous MOF membranes with well-defined channels remains a considerable challenge. In this study, amorphous titanium-based MOF membranes with concurrently optimized intercrystalline and intracrystalline selective transport channels were successfully prepared. The resulting membranes exhibited exceptional sieving performance for dyes with molecular weight cutoff of 600 Da. Additionally, defect-rich dual water channels within and between the amorphous MOF aggregates led to a remarkable water permeances up to 107.4 L m −2 h −1 bar −1 , significantly surpassing the benchmarks set by other nanofiltration membranes. This work offers valuable insights into the influence of amorphization on the design of a wide variety of MOF membranes, paving the way for advanced separation applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yefeng He,Siqi He,Hongji Wang,Xiaoyu Li,Liying Cui,Zhongkai Liu,Shengkai Liu,Xiaoshuai Wang,Mengqi Liu,Yujie Fu,Zhiguo Liu
Cyclodextrin-based metal-organic frameworks (γ-CD-MOFs) are promising biocompatible nanocarrier. However, it faces the problem of poor stability in aqueous solution. This study explores camptothecin delivery using a natural polymer-based shell (chitosan/carboxylated cellulose nanofibers) modified γ-CD-MOF core, establishing a novel strategy for safe and efficient CPT delivery. The γ-CD hydrophobic cavities significantly enhance CPT solubility and loading. The fabricated nanocarrier achieve CPT loading and encapsulation efficiencies of 26.4 ± 2.52 % and 70.2 ± 2.88 % respectively. Furthermore, the CPT load nanocarrier demonstrate <5 % hemolysis at the concentration of 800 μg/mL, exhibit drug release behavior conforming to the Higuchi equation, and show significant antiproliferative effects against MDA-MB-231 cells.
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PubMed
高影响因子
Biomaterials Science
·
2025
·
IF 5.7
Jing-Lan Kan,Fan-Hong Lv,Wen-Xiu Ren,Qun Guan,Anqi Xue,Jie Feng,Yu-Bin Dong
Photodynamic therapy (PDT) is a minimally invasive and local light-activated treatment for annihilating tumor tissues. However, it is often limited by the tissue penetration depth of common external light sources. To address this issue, we herein report a self-illuminating ZIF-90 MOF-based composite photosensitive system prepared using a combined one-pot self-assembly and post-synthetic modification (PSM) methodology. The obtained PME@Zn/Fe-ZIF-90-Lum consists of the Fe(II)-doped and luminol-decorated MOF host as well as the protoporphyrin IX dimethyl ester (PME) guest. Under the given conditions, the light, which is generated from the Fe(II)-catalysed luminol oxidation by endogenous H2O2, can in situ activate the encapsulated photosensitizer PME to produce reactive oxygen species (ROS) via a chemiluminescence resonance energy transfer (CRET) process. In the absence of an external light source, antitumor PDT is successfully realized and high phototoxicity is fully evidenced by in vitro and in vivo experiments.
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PubMed
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JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Chenyang Qi,Jiang Li,Yayun Shi,Bowen Zhang,Tongdan Chen,Chen Wang,Qihang Liu,Xiaowei Yang
Ion sieving is essential for biological systems and membrane-based applications. At present, metal-organic framework (MOF) membranes are of great interest for use in ion separation, but it remains a great challenge to design high quality MOF membranes with a simple preparation process and desirable ion selectivity. Herein we fabricate a MOF composite membrane , containing highly penetrated ZIF-8 channels. The ZIF-8 channels are the dominant pathways for ion transport and display a good Li + /Mg 2+ sieving performance (Li + /Mg 2+ = 6.1). The simulation reveals that the Li + /Mg 2+ selectivity is associated with the significant disparity of transport energy barrier between them, which is caused by the different extent of ion dehydration in angstrom-scale ZIF-8 channels. This work provides an effective strategy to develop ionic sieving membranes based on penetrating MOF channels for lithium extraction.
研究领域:
材料科学
·
化学工程
·
环境科学
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 17
·14228-14239
·
IF 2.779
Liu Jieling,Yang Jiaji,An Shuyue,Wen Meiqi,Wang Xian,Gong Rongzhou,Nie Yan
Metal-organic framework (MOF) crystals have promising applications in a number of different fields, but the growth of MOF crystals with controllable morphology and high uniformity remains a major challenge. By taking the advantage of the synergistic effects of water molecules in the mixed solvent and polyvinylpyrrolidone (PVP) surfactants, this work demonstrates an approach for the preparation of NH 2 -MIL-88B(Fe) MOF crystals with both highly customizable size and aspect ratios and high uniformity. The effects of the concentration of water in the mixed solvent and the amount of PVP surfactants on the morphology and size of the MOF crystals were investigated. The morphology and crystalline properties were characterized by scanning electron microscopy and X-ray diffraction techniques. The data showed that through controlling the concentration of water in the solvent and the amount of the PVP surfactant, the size of the MOF crystals can be tuned rather widely, over 344–5.14 μm, while the aspect ratio of the crystals can be varied widely over 1.0–7.1. Possible mechanisms for such high tunability were discussed. As an example of potential applications, the complex permeability and permittivity of MOF-derived composites (25 wt%) were measured over a wide frequency range of 2–18 GHz. The parameters were then used to evaluate the potential for electromagnetic wave absorption. The results indicate that the composite with a thickness of only 1.2 mm exhibits a “− 10 dB” absorption bandwidth of 4.1 GHz and a minimum reflection of − 20 dB. Such bandwidth and reflection properties provide inspiration for future design of lightweight, broadband electromagnetic wave absorbers from the perspective of fine morphology control.
研究领域:
材料科学
·
化学工程
·
电磁学
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liyun Zhang,Yi He,Pingya Luo,Lan Ma,Shuangshuang Li,Yiling Nie,Fei Zhong,Yuqi Wang,Li Chen
Developing the high-efficient and robust antifouling membranes for oily emulsions to achieve the purpose of prolonging the service life of the membrane shows great demand because of the restriction of hydration anti-fouling mechanism strategy to against pollution. Herein, a hydrophilic photo-Fenton-like catalyst – GO/Fe-MOF assembled stabilized polyacrylonitrile (SPAN) nanofibrous membrane with underwater superoleophobicity, robust mechanical strength and photo-Fenton self-cleaning performance was firstly designed and fabricated via ultrasonic assistance, mussel-inspired fixation and low temperature hydrothermal synthesis methods. In this work, benefiting by the regulable amounts of GO nanosheets on the SPAN@GO/M88A membrane surface, the obtained membrane possessed sub-micrometer skin layer, which guarantees the balance of fast permeation flux (920–7083 ± 47 L m −2 h −1 ) and separation efficiency (>99.2%) for diesel/water emulsion with small emulsified oils. Moreover, introduced hydrophilic Metal-organic frame nanoparticles (MIL-88A (Fe)) into modified membrane endowed underwater anti-oil-fouling and photo-Fenton catalytic degradation performance for organic contaminants. Meanwhile, the charged GO/M88A heterostructure can assist to achieve demulsification for separation of surfactant-stabilized emulsions by strong electrostatic force. More importantly, attached and irremovable contaminants on the membrane can be quickly removed by photo-Fenton self-cleaning method, and achieved over 96% of recovery flux recovery ratio, which effectively prolonged the service life of the membrane. We believe the newly designed SPAN@GO/M88A membrane with hydration antifouling and photo-Fenton self-cleaning properties can stimulate more studies on revivable separation membranes for multifunctional applications.
研究领域:
材料科学
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环境工程
·
化学工程
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Science China-Chemistry
·
2020
·Vol. 63
·期 9
·1315-1322
·
IF 6.356
Zhang Wenmin,Wang Jun,Su Lichao,Chen Hui,Zhang Lan,Lin Lisen,Chen Xiaoyuan,Song Jibin,Yang Huanghao
Nanoscale metal-organic frameworks (nano MOFs) have emerged as a promising biomedical nanoplatform because of their unique properties. However, the exploration of nano MOFs in photoacoustic (PA) imaging is still limited. Here, a novel hydrogen sulfide (H 2 S)-activated nano copper-based MOF (Cu-MOF) was developed as a near-infrared (NIR) ratiometric PA probe for in vivo monitoring of endogenous H 2 S level and orthotopic colorectal cancer imaging via in situ reaction of nano Cu-MOFs with endogenous H 2 S that is closely associated with tumor growth and proliferation in colon cancer. The synthesized nano Cu-MOFs displayed excellent PA responsiveness towards tumor H 2 S level with high selectivity and rapid kinetics. The result suggests the developed probe may provide a unique opportunity to investigate the malignant behaviors of H 2 S-associated events in vivo .
研究领域:
生物医学工程
·
肿瘤学
·
影像医学
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 18
·4722-4731
·
IF 7.779
Zixuan Huang,Lin Zhang,Jiayou Hou,Tengjiao Xu,Bowen Song,Xi Bai,Hai Fu,Peipei Guo
It is highly desirable yet challenging to incorporate open micropores with mass transportation and open active metal sites into metal–organic frameworks (MOFs) for developing novel highly efficient catalysts. Herein, we report a catalyst of low-nuclearity copper-cluster-based micropore MOF, namely H-1e, incorporated with unsaturated Cu(II) centres as open active sites obtained via a highly efficient electrochemical synthesis within 20 minutes. The catalyst H-1e shows potential porosity with 1D open functionalized hexagonal channels for size-selective air oxidation as well as high stability. The electrochemically prepared H-1e exhibits excellent catalytic aerobic oxidation activity for the conversion of alcohols (mini-size) to aldehydes with over 99% selectivity and 99% yield under air conditions, showing excellent reusability and stability. The selective catalytic performances are found to be closely dependent on the suitable aperture size of the 1D channels in H-1e, which provided better beds for the oxidation transformations (confirmed by the computational DFT study). In this study, it offers a simple and potential strategy to construct microporous materials with open active metal sites to promote the catalytic efficiency of MOFs by electrochemical synthesis.
研究领域:
材料科学
·
催化化学
·
电化学
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高影响因子
ELECTROPHORESIS
·
2016
·
IF 2.482
Pingxiu Tang,Tao Bao,Zilin Chen
Metal-organic frameworks (MOFs) are attractive stationary phases in the field of separation sciences for their unique properties such as large specific surface areas, high porosity, and diverse structures. However, there are few MOFs, which have ultrahigh porosities and gas uptake capacities. In this work, MOF-180 with exceptional porosity, a cage size of 15 × 23 Å, was grown on inner wall of capillary as a novel stationary phase for open-tubular CEC. It has been demonstrated that the MOF-180-modified capillary column exhibited good performance for separation of acidic, basic, and neutral analytes. As compared with MOF-199-modified column, MOF-180-modified column exhibited specific recognition and size selectivity to the tested compounds. The characteristics observed by SEM and FTIR indicated that MOF-180 was successfully grafted on the inner wall of the capillary. The precisions (RSDs) of retention time, peak area, and W 1/2 for methylbenzene, ethylbenzene, n-propylbenzene, chlorobenzene, o-dichlorobenzene, and 1,2,4-trichlorobenzene were 0.50–0.54%, 3.31–4.13%, 0.35–1.61%, 1.73–4.22%, 2.67–4.37%, and 1.60–3.38%, respectively. Besides, the run-to-run, day-to-day, and column-to-column RSDs of EOF were 0.6%, 4.19%, and 4.31%, respectively.
研究领域:
分析化学
·
材料科学
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Miao Ding,Qi Zhang,Xian Chen,Zhihong Wang,Kun Ge,Ying Gu
Z-scheme nanozyme with homologous MOF-on-MOF architectures was prepared. • “Electron bridge” role of homologous Cu 2+ in boosting electron transfer. • Z-scheme structure suppressed electron–hole recombination. • POD-like activity was enhanced owing to homologous and Z-scheme structure. • Nanozyme enabled colorimetric detection and elimination of AFB 1 . Mycotoxins are typical contaminants produced by various fungal species, showing significant risks to human health due to their wide distributions and high carcinogenicity. Herein, the homologous heterostructured MOF-on-MOF nanozyme with Z -scheme structure were constructed via surface-initiated strategy by encapsulation of Cu-BDC on HKUST-1 for simultaneous colorimetric analysis and removal of aflatoxin B 1 (AFB 1 ). The homologous Cu 2+ ion plays a pivotal “electronic bridge” role in shortening the electron transfer distance between Cu-BDC and HKUST-1 and enhancing interfacial coupling. The recombination of intrinsic electrons and holes within HKUST-1@Cu-BDC can be suppressed owing to typical Z -scheme structure. These leads to a significant enhancement in peroxidase (POD)-like activity, as confirmed by advanced characterizations and density functional theory (DFT) calculations. Based on this enhanced homologous heterojunction, the indirect detection (HKUST-1@Cu-BDC/ssDNA biosensors) and direct removal (HKUST-1@Cu-BDC nanozyme) methods with limits of detection (LOD) of 0.87 μg/L and maximum removal rate of 79.6% for AFB 1 have been established. Finally, the homologous MOF-on-MOF nanozyme was successfully verified by both detection and removal process in complex food samples, while also demonstrating excellent repeatability and stability throughout the tests. This work provides a versatile strategy in designing and fabricating high-quality Z -scheme heterojunction nanozyme for mycotoxins governance. This study involved the development of an electron-bridge mediated Z -scheme nanozyme with homologous heterostructured MOF-on-MOF architectures (HKUST-1@Cu-BDC) via surface-initiated strategy by encapsulation of Cu-BDC on HKUST-1 for simultaneous colorimetric detection and removal of aflatoxin B 1 (AFB 1 ) two-in-one. Download: Download high-res image (174KB) Download: Download full-size image
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