MOLECULES
·
2024
·Vol. 29
·期 12
·2943
·
IF 4.2
Yaxin Li,Mouyi Zhang,Ying Wang,Lei Guan,Di Zhao,Xinyu Hao,Yuting Guo
A novel coordination polymer [Zn(atyha)2]n(1) (Hatyha = 2-(2-aminothiazole-4-yl)-2- hydroxyiminoacetic acid) was constructed by hydrothermal reaction of Zn2+with Hatyha ligand. CP1exhibits a 2D (4,4)-connected topological framework with Schläfli symbol of {44·62}, where atyha−anions serve as tridentate ligands, bridging with Zn2+through carboxylate, thiazole and oxime groups. CP1displays a strong ligand-based photoluminescence at 390 nm in the solid state, and remains significantly structurally stable in water. Interestingly, it can be utilized as a fluorescent probe for selective and sensitive sensing of Fe3+, Cr2O72−and MnO4−through the fluorescent turn-off effect with limit of detection (LOD) of 3.66 × 10−6, 2.38 × 10−5and 2.94 × 10−6M, respectively. Moreover, the efficient recyclability for detection of Fe3+and Cr2O72−is better than that for MnO4−. The mechanisms of fluorescent quenching involve reversible overlap of UV-Vis absorption bands of the analytes (Fe3+, Cr2O72−and MnO4−) with fluorescence excitation and emission bands for CP1, respectively.
研究领域:
材料化学
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分析化学
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DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Xu Mengxia,Wu Rao,Wang Shengqian,Xu Hualan,Zhong Shengliang
The preparation of coordination polymers with good room temperature phosphorescence is the focus of current research. In this paper, zinc and cadmium were used as metal ions and 2,3-pyridinedicarboxylic acid (H 2 L = 2,3-pyridinedicarboxylic acid) was used as organic ligands to successfully synthesize Cd (II) homometallic [CdL]·H 2 O and Zn(II)Cd(II) heterometallic [ZnCdL 2 ]·DMF·5H 2 O coordination polymers microstructures. In addition, morphology, powder X-ray diffraction (PXRD), infrared spectroscopy (IR), elemental analyses, thermogravimetric analysis (TGA) and their luminescence properties were studied. Cd-CP is a micron-sized spherical structure, while Zn/Cd-CP is a flower-like structure formed by the accumulation of sheets. The results show that Cd(II) homo- and Zn(II)Cd(II) heterometallic coordination polymers have quantum yields of 10.05% and 8.54%, respectively. It is worth noting that the lifetime of Cd-CP is 124.62 ms, while the lifetime of Zn/Cd-CP is significantly extended to 363.09 ms after doping with metal ion Zn 2+ . The phosphorescent lifetime of coordination polymers was improved by the heterometallic doping strategy, which provided a new idea and method for the preparation of coordination polymers with long-lived room temperature phosphorescent properties. In addition, the two coordination polymers exhibited blue and cyan fluorescence at 365 nm UV light, respectively, and a green afterglow of about 2 s could be observed with the naked eye when the UV lamp was turned off.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Chen Zhang,Yangyang Li,Yingjie Li,Weihao Zhang,Xiaoting Wang,Xiaojun He,Moxin Yu
The discovery of efficient carbonaceous adsorbents for the removal of organic dyes is a meaningful subject. In this study, hierarchical porous carbon materials (HPCMs) were synthesized from petroleum pitch through template strategy coupled with in-situ chemical activation, and the optimal HPCM was further modified by Zn(II) to get modified HPCM (MHPCM). Their properties and structures were characterized, and their adsorption performances for two typical dyes, methylene blue (MB) and direct black 38 (DB 38), were examined. The as-prepared HPCMs and MHPCM exhibit high specific surface area with hierarchical pore structure, abundant oxygen-containing group, and distinct layered structure. As an adsorbent for dye removals, the MHPCM shows excellent performance with its Langmuir saturated adsorption capacity being 1585.7 and 438.6 mg/g for MB and DB 38, respectively. This is mainly due to the large surface area and hierarchical pore structure of HPCMs, as well as the modification effect of Zn(II). This work provides an efficient strategy for the synthesis of carbonaceous adsorbents used in the adsorptive removal of different molecular size dyes, as well as a new approach for the valuable use of low-cost petroleum pitch.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yangjiao Han,Kaixin Xi,Chengshu Zhang,Wenpin Wang,Zhibo Li
Achieving an optimal combination of high toughness, healability, and recyclability in silicone-based elastomers remains a significant challenge, primarily attributed to the inherently weak interactions between polysiloxane molecules. Herein, a thermoplastic poly(silicone-urea) elastomer exhibiting superior mechanical properties is developed by optimizing the synergistic Zn(II)–carboxylate interactions and weak hydrogen bonds between thermodynamically incompatible poly(dimethylsiloxane) (PDMS) and poly(propylene glycol) (PPG). Despite their distinct polarities, PDMS and PPG are chemically constrained, leading to microphase separations exclusively at the nanoscale. Furthermore, the hard segment comprises discrete and small hydrogen-bonding domains and metal-coordination domains. The forced compatibility and spontaneous phase separation of soft segments, in conjunction with the superimposed reversibility of discrete hard segment regions, can cooperatively dissipate energy during elastomer deformation. The obtained elastomer demonstrates a remarkable toughness of 69.9 MJ m−3, an exceptional stretchability of 2259%, and good elastic recovery under small deformation (≤300%) while preserving good recyclability and healability. These properties position the elastomer as a promising candidate for applications in flexible electronic devices, thereby contributing to the development of a sustainable society.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 19
·3412
·
IF 5.719
Bingkai Han,Xin Wen,Jinneng Wang,Yingrui Sun
Caffeic acid is an antioxidant that has been widely been related to the health benefits of people in recent years. In this paper, the amino side chains of chitosan (CS) were modified with protoporphyrin IX by amide cross-linking, and then Zn ions were chelated. The properties of metalloporphyrin-preparing functionalized multi-walled carbon nanotubes (MWCNTs) and Zn ions chelated by protoporphyrin IX composites were used as sensitive-selective electrochemical biosensors for the determination of caffeic acid. The morphology and structure of nanocomposite Zn–PPIX–CS–MWCNTs were observed by X-ray spectroscopy mapping (EDX mapping), transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FTIR). The electrochemical behaviors of Zn–PPIX–CS–MWCNT-modified glassy carbon (GC) electrodes were evaluated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results show that the modified electrode had good electrocatalytic activity towards caffeic acid with a wide linear range of 0.0008–1.6 mM, an excellent sensitivity of 886.90 µAmM−1cm−1, and a detection limit of 0.022 µM. In addition, the caffeic acid sensor had excellent reproducibility, stability, and selectivity to various interfering substances. Therefore, the modified electrode prepared by this experiment can also be applied to electrochemical sensors of other substances.
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
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 41
·14088-14093
·
IF 4.029
Yuangang Xu,Pengcheng Wang,Qiuhan Lin,Ming Lu
A carbon-free inorganic–metal complex [Zn(H2O)4(N5)2]·4H2O was synthesized by the ion metathesis of [Na(H2O)(N5)]·2H2O solution with Zn(NO3)2·6H2O. The complex was well characterized by IR and Raman spectroscopy, elemental analysis (EA), powder X-ray diffraction (PXRD), and differential scanning calorimetry (DSC). The structure of the complex was confirmed by single-crystal X-ray crystallography and a Zn(II) ion is coordinated in a quadrilateral bipyramid environment in which the axial position is formed by two nitrogen atoms (N1) from two pentazolate rings (cyclo-N5−) and the equatorial plane is formed by four oxygen atoms (O1) from four coordinated water molecules. The thermal analysis of [Zn(H2O)4(N5)2]·4H2O reveals that although water plays an important role in stabilizing cyclo-N5−, dehydration does not cause immediate decomposition of the anion. However, cyclo-N5− decomposed into N3− and N2 gas at 107.9 °C (onset). Based on its chemical compatibility and stability, the complex exhibits promising potential as a modern environmentally-friendly energetic material.
研究领域:
化学
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材料科学
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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
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 62
·期 5
·870-879
·
IF 3.4
Yingdong Wu,Lu Bai,Junping Zheng
In recent years, as an emerging dynamic bonding, silyl ether linkages have been concerned and applied. However, the reprocessability of vitrimers based on it is far from satisfactory because of the inactive dynamic exchange reaction. At the same time, the mechanical properties of polysiloxane elastomers are poor because of the high flexibility of polysiloxane molecular chains and weak intermolecular forces. Herein, we have successfully synthesized a PDMS elastomer incorporating Zn(II)-amine coordination bonds as sacrificial units, which are crosslinked through dynamic silyl ether linkages. Importantly, the presence of Zn ions promotes the exchange between the silyl ether linkages and hydroxyl groups. The elastomers exhibited excellent mechanical properties (35 times improvement in toughness) and outstanding reprocessability. The mechanical property recovery of the PDMS elastomers reached approximately 90% after four reprocessing cycles. Meanwhile, small-molecule simulation experiments were conducted to verify the significant catalytic effect of Zn (II) ions as Lewis acid catalysts on the exchange reaction of silyl ether linkages and hydroxyl groups. In a word, this work provides a facile strategy to simultaneously enhance the mechanical properties and reprocessing performance of silyl ether-linked polysiloxane elastomers. Graphical
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2022
·
IF 3.718
Hong-Mei Liu,Xiao-Na Shang
Through the self-assembly reaction of 5-substituted isophthalic acid and bis(imidazolyl) ligands with Cd(II) ion or Zn(II) ion, two new coordination polymers with the chemical formulae of [Cd(5-meo-ip)(bmip)]n (1) and [Zn(5-pro-ip)(bip)]n·2 n(H2O) (2) (5-meo-H2ip = 5-methoxyisophthalic acid, 5-pro-H2ip = 5-propoxyisophthalic acid, bmip = 1,3-bis(2-methylimidazolyl)propane bip = 1,3-bis(imidazolyl)propane) were successfully obtained and structurally characterized by a series of characterization techniques. Moreover, compounds 1–2 show intense blue luminescence at room temperature. Furthermore, the assessment of their treatment activity on the uterine fibroids combined with ultrasound therapy was evaluated and the specific mechanism was investigated at the same time. Firstly, the effect of compound treatment on uterine fibroids apoptosis was detected via flow cytometry. Next, the apoptotic signaling pathway activation was detected through the Caspase-3 and Caspase-8 Activity Assay Kit.
研究领域:
材料科学
·
医学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Shuai Tang,Lujian Lin,Xuesong Wang,Anqi Yu,Xuan Sun
In water environments, nylon microplastics (MPs) and heavy metals are two kinds of common pollutants. This study investigated the adsorption of three divalent metals (Cu(II), Ni(II), Zn(II)) onto collected nylon MPs as function of contact time, temperature, solution pH, ionic strength and concentration of fulvic acid (FA). The kinetic data fitted well with the Elovich and pseudo-second order equations. The result of shrinking core model (SCM) confirms that the adsorption of Cu(II) and Zn(II) was mainly controlled by intraparticle diffusion. The adsorption of three metal ions onto collected nylon MPs is spontaneous, endothermic, with an increased randomness in nature. The Langmuir and Freundlich models successfully described the adsorption isotherms. The speciation distributions of three divalent metals in aqueous solutions were identified to analyze the effects of initial solution pH, ionic strength and fulvic acid concentrations on the adsorption amounts. X-ray photoelectron spectroscopy (XPS) analysis indicates the importance of surface O-containing groups of collected nylon MPs in controlling the adsorption of three metal ions. This research provides a clear theoretical basis for the behavior of nylon MPs as heavy metals (Cu(II), Ni(II), Zn(II)) carrier and highlights their environmental toxicity, which deserves to be further concerned.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Zhiyuan Feng,Lin Cheng,Hong Fan,Jia Liu,Fusheng Han
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation and to request the original data. Per journal policy, the editors, at their discretion, may request deposition of any or all original data files for examination by the reviewers and/or editors. As a result of the author’s unsatisfactory explanation and failure to provide these data—in violation of journal policy—the editors feel that the findings of the manuscript cannot be relied upon. The corresponding author agrees to this retraction.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
Jingyi Chen,Xiaoxue Zhang,Junsheng Liu,Shan Jiang,Chunyu Ji,Jie Zhang
A series of novel polyethyleneimine/graphene oxide (PEI@GO) membranes were prepared and their adsorptions for heavy metal ions in mixed solutions were examined. It was found that they had good sorption performances for Pb(II), Cu(II), and Zn(II) in water. Their adsorptions for Pb(II), Cu(II), and Zn(II) obeyed the first-order kinetic modeling, dominating a physical style. Meanwhile, the fitting of intra-particle diffusion showed that Pb(II) and Cu(II) did not conform to the intra-particle diffusion stage, whereas Zn(II) did. Moreover, it was confirmed that the sorption of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) followed the Langmuir isotherm modeling, and the maximal values could reach 79.6 mg/g for Pb(II), 35.01 mg/g for Cu(II), and 32.27 mg/g for Zn(II), respectively. The calculation of thermodynamic parameters indicated that these adsorptions were spontaneous and endothermic processes. Further, the investigation of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) in ternary mixed systems evidenced that Zn(II) can be preferentially removed via step-by-step mode. In addition, the exploration of sorption mechanism using XPS and FTIR analyses showed that ligand interactions were involved in the adsorptive removal of Pb(II), Cu(II), and Zn(II). This study discloses that PEI@GO membranes are promising adsorbents for the removal of heavy metal ions from water.
研究领域:
环境科学
·
材料科学
·
水处理
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）