JOURNAL OF MOLECULAR STRUCTURE
·
2025
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IF 4.7
Xiaojing Mao,Huachang Li,Yehong Shi,Jiemin Liu,Lijun Kuai,Jijun Liu,Yan Han,Yuexi Huang,Haijiao Xie
Two zinc-based metal-organic frameworks, namely [Zn(L 1 )(Phen)H 2 O] n ( 1 ) and {[Zn(L 2 )(Phen)]⋅(H 2 O)} n ( 2 ), were successfully constructed by mixed ligands strategy (HL 1 =1,4-benzendicarboxylic acid, Phen=1,10-phenanthroline monohydrate, HL 2 =5-hydroxyisophthalic acid), and characterized by X-ray single crystal diffraction, elemental analysis, powder X-ray diffraction (PXRD), etc. The X-ray single crystal diffraction demonstrate that both 1 and 2 show 1D chain structure. The orbital energies of 1, 2 and ligands have been investigated using the Density Functional Theory (DFT) calculations. The fluorescent sensing experimental revealed that both 1 and 2 exhibited excellent selectivity and sensitivity towards Cu 2+ and Co 2+ ions over other metal ions, and the detection limit (LOD) of Cu 2+ and Co 2+ for 1 were 0.077 μM and 0.15 μM, and the LOD of Cu 2+ and Co 2+ for 2 were 0.81 μM and 0.48 μM, respectively. In addition, the fluorescence quenching mechanism of Cu 2+ and Co 2+ can be attributed to energy competitive absorption. Furthermore, in the real sample detection, the recoveries of Cu 2+ and Co 2+ were 92.6 - 109.1 % and 96.7 - 110.0 %, respectively. This work provided a reliable method for the quantitative detection of Cu 2+ and Co 2+ and was successfully applied in river water with satisfactory recovery and precision.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 3
·499-507
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IF 3.1
Tao He,Ji Chengshan,Zhang Jian,Yin Yuanyuan,Jia Wenwen,Jiang Xin,Xu Jie,Yang Yulin
The abuse of tetracycline antibiotics has caused great harm to human health and ecosystems. Developing inexpensive, convenient and sensitive methods for the detection of tetracycline antibiotics is highly desirable. Herein, based on the H 4 ddp ligand [H 4 ddp=3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic acid], two novel zinc-based metal-organic frameworks (MOFs) {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn1-ddp) and {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn2-ddp) were successfully designed by delicate structural regulation. Both Zn1-ddp and Zn2-ddp exhibited excellent water and chemical stability and showed excellent fluorescence quenching performance for tetracycline antibiotics. Notably, the more advanced framework structure and better fluorescent performance make Zn1-ddp more sensitive than Zn2-ddp in fluorescent detection with a detection limit of 0.29 µmol/L for tetracycline (TC), 0.09 µmol/L for doxycycline (DOX), 0.10 µmol/L for minocycline (MIN) and metacycline (MEL), 0.19 µmol/L for chlortetracycline (CTC), and 0.67 µmol/L for oxytetracycline (OTC) among tetracycline antibiotics. The fluorescence quenching mechanism of Zn1-ddp and Zn2-ddp for tetracycline antibiotics detection was deeply investigated. The reasons for the superior detection performance of Zn1-ddp over Zn2-ddp were also analyzed in depth through Fourier transform infrared spectrophotometry (FTIR), X-ray photoelectron spectroscopy (XPS) analysis and framework structure analysis. The developed method opens up a new perspective for antibiotics detection based on zinc-based MOFs.
研究领域:
分析化学
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环境科学
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生物医学
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2024
·
IF 9.4
Yan-Kai Zhang,Yong-Zheng Zhang,Chun-Xiao Jia,Fang Wang,Xiuling Zhang,Yuhang Wu,Zhongmin Liu,Hui Hu,Da-Shuai Zhang,Longlong Geng,Jing Xu,Hongliang Huang
ABSTRACT The highly desired goal is to employ visible light for the photocatalytic reduction of toxic Cr(VI) to environmentally friendly Cr(III). Metal-organic frameworks (MOFs) are considered one of the most promising materials for the photoreduction of Cr(VI). Nevertheless, developing MOFs with high stability and activity is still challenging. Herein, we report a stable Zn-based MOF (named DZU-64 ) with an anthracene functionalized ligand, and its reduction of Cr(VI) under sunlight irradiation was investigated. DZU-64 exhibits excellent chemical stability in pH range of 2−14 aqueous solution, and remarkable thermal stability to 570°C. For the photoreduction of Cr(VI) under visible light irradiation, DZU-64 gives a record rate constant of 0.467 min −1 and a high Cr(VI) reduction rate of 6.68 mg Cr (VI) g −1 cata min −1 at pH 2. Moreover, under real solar light, DZU-64 can also efficiently reduce Cr(VI) to Cr(III) while retaining its catalytic activity throughout 5 cycles without any notable decline, further demonstrating its great application prospect. By combining the photovoltaic performance tests and electron spin resonance test, the possible photoreduction of Cr(VI) mechanism in DZU-64 was analyzed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Jiaojiao Cao,Yubo Lian,Huatao Weng,Zhenyu Chen
The effect of an external DC electric field on the inhibition behavior of Zn-MOFs in 0.5 mol/L NaCl solution for copper was investigated via electrochemical measurements and various characterization techniques. Results indicated that the corrosion inhibition efficiency of the Zn-MOFs decreased under strong electric field intensities, which went from 94.2% to 61.7%. The corrosion inhibition efficiency of the materials decreased with increasing electric field duration when maintained at a certain electric field intensity. When the electric field duration time was 6 h, 12 h, 18 h and 24 h, the corresponding efficiency was 90.4%, 86.8%, 78.2% and 61.7% respectively. The effect of an electric field on the corrosion inhibition performance of the Zn-MOFs could essentially be attributed to changes in the structure of the material framework.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 134
·期 2
·1003-1015
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IF 2.081
Chen Anna,Zhang Jin,Zhou Yi,Tang Haiqin
In this study, the MOF-5/BiOBr photocatalyst with microsphere structure was synthesized by hydrothermal method for the first time. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, SEM, TEM, XPS and electrochemistry. The results show that the synthesized MOF-5/BiOBr photocatalyst exhibits better photocatalytic performance than pure MOF-5 and BiOBr under simulated sunlight. The efficiency of Rhodamine B (RhB) removal based MOF-5/BiOBr composite (MOF-5 with mass ratio of MOF-5/BiOBr = 20 wt% of) reached 99.7%. The possible photocatalytic mechanism is discussed through the capture experiment of active species. The enhanced photocatalytic performance of the MOF-5/BiOBr composite may be related to the interaction between BiOBr and MOF-5 and the type II charge transfer path. The catalyst has simple preparation process, low cost, high activity under natural light, and high efficiency, and is expected to play a role in the treatment of environmental wastewater. This work provides a new insight for designing MOF-5 based photocatalyst.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Rui-Li Yu,Qian-Fan Li,Zhen-Le Li,Xiao-Yu Wang,Liang-Zhi Xia
This study aimed to develop effective adsorbents for capturing radioactive iodine in nuclear power waste gas. Two zinc metal–organic frameworks (Zn-MOFs) were synthesized and found to have favorable properties such as a large surface area, thermal stability, surface rich in π-electron-containing nitrogen, and redox potential. Adsorption experiments revealed maximum capacities of 1.25 and 1.96 g g–1 for the MOFs at 75 °C, with the pseudo-second-order kinetic model fitting the data well. The Langmuir equation provided a better fit in cyclohexane, with maximum adsorption amounts of 249 and 358 mg g–1 for Zn-MOF-1 and Zn-MOF-2, respectively. The MOFs were also stable during six cycles of adsorption and desorption. Furthermore, electron transfer occurred due to the synergistic adsorption of Zn, N, and O atoms, resulting in the conversion of some iodine to polyiodide. Zn-MOF-2 exhibited better chemisorption than Zn-MOF-1 due to a smaller highest occupied molecular orbital (HOMO)–lowest unoccupied molecular orbital (LUMO) gap. Notably, it was discovered that N-containing radicals had stronger interactions with iodine compared to radicals without N. These findings provide valuable insights into MOF synthesis and environmental protection.
研究领域:
核化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 7
·e5518
·
IF 3.14
Bin Zhu,Ziao Zong,Xia Zhang,Dongmei Zhang,Liansheng Cui,Caifeng Bi,Yuhua Fan
Tetracycline (TC) is one of the most widely used antibiotics in aquaculture, and its good water solubility makes it a major contaminant in seawater. Therefore, it is very necessary and challenging to develop an efficient detection method. In this work, two novel metal–organic frameworks [Zn (bpydb)(bimmb) 0.5 ] n ( 1 ), {[Zn 2 (bpydb) 2 (bimb)]·[Zn (bpydb)(bimb)]·H 2 O} n ( 2 ), (bimb = 1,4-bis (lmidazol) butane, H 2 bypdb = 4,4′-(4,4’-Bipyridine-2,6-diyl)dibenzoic acid, bimmb = 1,4-bis (imidazol-1-ylmethyl)benzene) were successfully synthesized under solvothermal conditions. Zn-MOF 1 – 2 were characterized by X-ray powder diffraction (PXRD), Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). As expected, 1 – 2 have excellent fluorescence properties, thermal stability and good structural stability in water. TC in water can be detected by fluorescence quenching with high selectivity. At the same time, the fluorescence quenching efficiency remains unchanged in the presence of other interfering antibiotics and in aqueous solutions of different pH values (pH = 3–10). The detection ability of 1 in real seawater has not changed substantially, showing considerable practical application prospects. Interestingly, 1 – 2 also efficiently detected traces of acetone in solution with detection limits of 0.07 μM (4.38 ppb) and 0.18 μM (10.85 ppb), respectively. In addition, the mechanism of fluorescence quenching is further discussed.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2022
·
IF 4.969
Ruixue Wu,Xia Zhang,Jinmiao Wang,Lulu Wang,Bin Zhu,Cungang Xu,Guanning Cui,Dongmei Zhang,Yuhua Fan
Two novel Zn-MOFs constructed from 5-hydroxy-2-nitroisophthalic acid (H 2 DIPA) and 5-(4-carboxy-2-nitrophenoxy)-2-nitroisophthalic acid (H 3 BPPA), namely: {[Zn 2 (DIPA) 2 (bimp) 5 ]·DMF·2H 2 O} n ( Zn-MOF 1 ), {[Zn 2 (HBPPA) 2 (bibp) 2 ]·2H 2 O} n ( Zn-MOF 2 ) (bimp = 1,4-di(1H-imidazol-1-yl)butane, bibp = 4,4′-bis(imidazolyl) biphenyl), have been synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction, elemental analysis, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TG). The single-crystal X-ray diffraction analysis indicates that Zn-MOF 1 exhibits an uncommon 3-nodal framework with a (4·6·8)(4·6 3 ·8 2 )(6 6 ) topology, whereas Zn-MOF 1 exhibits an uninodal 4-connected framework with a (4 4 ·6 2 ) topology. Moreover, both of the two Zn-MOFs exhibit exceptional dye adsorption capacities towards the organic dyes with high adsorption rates and excellent adsorption amounts. Particularly, Zn-MOF 1 can selectively adsorb the cationic dye malachite green (MG) whereas Zn-MOF 2 adsorb the anionic dye methyl orange (MO) when there exists another kind of dye in the system. The adsorption process can be illustrated by pseudo-second order kinetic and Langmuir isotherm, and the feasible adsorption mechanism could be the electrostatical interactions, hydrogen bonding between the MOFs and the dyes. Meanwhile, the two Zn-MOFs also show good photocatalytic degradation capabilities toward MB/MV dyes under UV irradiation, and the mechanism studies demonstrate that the main active species are ·OH radicals. Therefore, this functional MOF materials can be treated as a convenient and cost-efficient solution for the sewage handling and environmental protection.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xingjin Yang,Zheng Liu,Huanqi Chen,Qingge Feng,Dongbo Wang
Due to the strong polarity and difficult in biodegradation, acesulfame (ACE) and saccharin (SAC) are difficult to treat effectively in water environment. Herein, a series of ACE and SAC adsorption were investigated by the zinc-based MOFs (ZIF-8, MAF-6, MOF-5 and Zn-MOF-74) derived porous carbons (MPCs). The porous carbon derived from MOF-5 (MPCs-M5) and Zn-MOF-74 (MPCs-M74) of zinc-based carboxylate MOFs exhibited large surface area (2774.7 m 2 /g and 2447.3 m 2 /g), high mesoporosity (94.57% and 95.66%) and equipotential point value (7.85 and 9.82). The pseudo-second-order kinetic model and Freundlich adsorption model were fitted well to explore adsorption on the MPCs-M5 and MPCs-M74, respectively. Moreover, the MPCs-M5 and MPCs-M74 showed notable adsorption capacity of ACE (96.4 mg/g and 88.6 mg/g) and SAC (117.3 mg/g and 113.4 mg/g), respectively, which were the highest value than the previous reports. Furthermore, the excellent adsorption performance of MPCs-M5 and MPCs-M74 were also contributed by multi-faceted synergy of electrostatic, H-bond, and π-π interactions. Therefore, the above two samples of the hierarchical porous carbon prepared by self-activating zinc-based carboxylate MOFs with high oxygen content are recommended as efficient adsorbents for artificial sweeteners adsorption from water environment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
POLYMER TESTING
·
2023
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IF 5.1
Guorong Wang,Zhiyuan Mei,Yu Li,Zhaoyi Sun
A low-cost metal-organic framework suitable for high-efficiency production is synthesized by a solvothermal method using a transition element Zn and 4-hydroxybenzoic acid (HBA). These hollow Zn-HBA nanospheres are added to epoxy resin-based coating (E 51-LP 3) to form a flame-retardant and thermal insulation coating. Data obtained from cone calorimetric test demonstrates that the addition of Zn-HBA nanospheres effectively inhibits the combustion and smoke release of the coating. At Zn-HBA content of 50.0 vol%, the limiting oxygen index increases by 46% (from 21.5% to 31.5%) and UL 94 rating reaches V-0. Moreover, the thermal insulation performance of E 51-LP 3 containing 50 vol% Zn-HBA as flame-retardant is also significantly improved. This work demonstrates that these low-cost hollow Zn-HBA nanospheres, suitable for high-efficiency production, can be used as an additive to produce nanocoatings with both excellent flame-retardant and thermal insulation properties, while providing a solution for reducing the cost of multifunctional coatings.
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
Journal of Saudi Chemical Society
·
2024
·
IF 5.8
Shiye Li,Yudan Chai,Jian Zhang,Jie Wang,Chao Yang,Jin Zhang,Shixing Cheng
Due to its adjustable pore structure, the metal–organic frameworks (MOFs) have attracted much attention in the treatment of organic dye molecules in wastewater. However, the general tuning of the pore channels of MOFs is mainly by changing the chain length of the organic ligands and metal nodes. This approach not only limits the types of MOFs, but also limits the treatment of a large number of dye methylene blue (MB) and methyl orange (MO) dye molecules in the wastewater. Hence, we synthesized photoresponsive Zn-AzDC/TPA MOF as adsorbents to adsorb and release organic dye molecules in a photo-controlled manner. The photoresponsive Zn-AzDC/TPA was prepared using a mixed ligand strategy, in which the azobenzene carboxylic acid derivative (AzDC) served as a photoresponsive ligand and terephthalic acid (TPA) served as a non-active ligand in coordination with zinc ion. The optical and structural properties of the synthesized Zn-AzDC/TPA was characterized by UV–vis, FT-IR, PXRD, SEM, TEM, TGA, and pore analysis. Interestingly, it was found that the photoresponsive AzDC unit of Zn-AzDC/TPA demonstrated reversible trans – cis isomerization under the alternating UV and visible light, resulting in reversible changes in the pore size of the Zn-AzDC/TPA . Its photoresponse properties can trapp and release dye molecules under light-driven conditions. This result provides a new direction for the application of photoresponsive MOF and also lays a foundation for the study of diversified optically responsive materials.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 12
·2755
·
IF 4.2
Jing Ru,Yi-Xuan Shi,Qing-Yun Yang,Teng Li,Hai-Ying Wang,Fan Cao,Qiang Guo,Yan-Lan Wang
2,6-pyridine dicarboxylic acid (DPA) is an exceptional biomarker of notorious anthrax spores. Therefore, the rapid, sensitive, and selective quantitative detection of DPA is extremely significant and urgent. This paper reports a Zn(II) metal–organic framework with the formula of {[Zn6(NDA)6(DPBT)3] 2H2O·3DMF}n(MOF-1), which consists of 2,6-naphthalenedicarboxylic acid (2,6-NDA), 4,7-di(4-pyridyl)-2,1,3-benzothiadiazole (DPBT), and Zn(II) ions. Structural analysis indicated that MOF-1 is a three-dimensional (3D) network which crystallized in the monoclinic system with theC2/c space group, revealing high pH, solvent, and thermal stability. Luminescence sensing studies demonstrated that MOF-1 had the potential to be a highly selective, sensitive, and recyclable fluorescence sensor for the identification of DPA. Furthermore, fluorescent test paper was made to detect DPA promptly with color changes. The enhancement mechanism was established by the hydrogen-bonding interaction and photoinduced electron transfer transition between MOF-1 and DPA molecules.
研究领域:
化学
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生物学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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