ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Dong Guo,Ao Nan Lai,Chen Xiao Lin,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
With the intention of optimizing the performance of anion-exchange membranes (AEMs), a set of imidazolium-functionalized poly(arylene ether sulfone)s with densely distributed long flexible aliphatic side chains were synthesized. The membranes made from the as-synthesized polymers are robust, transparent, and endowed with microphase segregation capability. The ionic exchange capacity (IEC), hydroxide conductivity, water uptake, thermal stability, and alkaline resistance of the AEMs were evaluated in detail for fuel cell applications. Morphological observation with the use of atomic force microscopy and small-angle X-ray scattering reveals that the combination of high-local-density-type and side-chain-type architectures induces distinguished nanophase separation in the AEMs. The as-prepared membranes have advantages in effective water management and ionic conductivity over traditional main-chain polymers. Typically, the conductivity and IEC were in the ranges of 57.3–112.5 mS cm–1 and 1.35–1.84 mequiv g–1 at 80 °C, respectively. Furthermore, the membranes exhibit good thermal and alkaline stability and achieve a peak power density of 114.5 mW cm–2 at a current density of 250.1 mA cm–2. Therefore, the present polymers containing clustered flexible pendent aliphatic imidazolium promise to be attractive AEM materials for fuel cells.
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高影响因子
RSC Advances
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2016
·Vol. 6
·期 87
·84133-84138
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IF 3.289
Feng Li,Jiashuang Luan,Shuling Zhang,Yuchao Luo,Yinlong Du,Cong Gao,Guibin Wang
A novel monomer containing tetraphenylethylene-(2,6-difluorophenyl)(4-(3-(4-1,2,2-triphenyl vinyl)phenoxy)propyl)phenyl)methanone (2F-TPE) was designed and synthesized by reaction of (4-(3-bromopropyl)phenyl)(2,6-difluorophenyl)methanone and 1-(4-hydroxyphenyl)-1,2,2-triphenylethene. A series of high fluorescence intensity poly(aryl ether ketone) copolymers containing tetraphenylethylene (TPE–PAEK) were prepared, which is the first report of preparing PAEK featuring tetraphenylethylene groups by polycondensation. The fluorescence and thermal properties of TPE–PAEK were characterized using fluorescence spectrophotometer, differential scanning calorimetry and thermogravimetric analysis respectively. The results indicated that tetraphenylethylene-based copolymers possessed high fluorescence intensity at a low concentration both in solids and in water/THF mixtures. TPE–PAEK still presented strong fluorescence intensity at elevated temperature up to 90 °C. In addition, TPE–PAEK possess excellent thermal stability.
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Analytical Methods
·
2017
·Vol. 9
·期 18
·2673-2681
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IF 1.9
Lingling Wang,Qi Li,Lei Zhang
An elastic cylindrical three-dimensional porous spongy graphene rod (3D-PSGR) was synthesized by a facile one-step hydrothermal method and applied in a syringe system as a solid phase adsorbent for the extraction of nine trace bisphenol analogs (BPs) from environmental samples. In this study, a simple sample pretreatment procedure in-syringe-assisted solid phase microextraction (ISA-SPME) was developed for the detection of nine BPs with HPLC. The full protocols for the extraction and elution process were achieved in a syringe. After enrichment, the sample solution was expelled slowly from the syringe to leave the adsorbent with the analytes behind. The analyte-enriched adsorbent was then eluted by drawing MeOH into the syringe, and the elution solution was then injected in HPLC. The 3D-PSGR exhibits excellent cycling stability and can be reused for eight consecutive cycles without significant loss of extraction efficiencies. The 3D-PSGR-ISA-SPME was applied successfully to the analysis of nine BPs in river water and soil samples. The method detection limits (MDLs) were in the range of 0.39–3.97 ng mL−1, and the extraction recoveries of the spiked samples were in the range of 96.5–102.6% with relative standard deviations (RSDs) of 2.11–4.27%. A convenient method is proposed for the analysis of nine trace BPs in environmental samples.
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MICROCHIMICA ACTA
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2017
·Vol. 184
·期 3
·951-959
·
IF 4.58
Zhang Yuhuan,Wang Yanru,Zhu Wenxin,Wang Jing,Yue Xiaoyue,Liu Wei,Zhang Daohong,Wang Jianlong
The capability of multi-level logic operations in biological diagnosis is far from being fully realized. In particular, the simplification of logic judgments to realize rapid, on-site complex diagnoses is still a key issue in bioelectronics. The authors here describe the construction of a colorimetric multilevel DNA circuit that incorporates two IMPLY gates and a sample extraction technology (SET) with anti-BPA aptamer as a co-recognizing element and the color of gold nanoparticles as the output signal. The circuit can perform multi-bioanalysis of the plasticizers and hormone mimetics bisphenol A (BPA) and bisphenol S (BPS). The assay is based on the finding that the aptamer against BPA can recognize both BPA and BPS. This DNA logic detection system is simple, fast, sensitive and selective because of the utilization of a co-recognition element which decreased input numbers. This, in turn, cascades multiplex Boolean logic gates and simplifies the diagnostic challenge. Both BPA and BPS can be determined by photometry at 620 nm, the limit of detection being 1.5 ng⋅mL −1 for BPA and 1.3 ng⋅mL −1 for BPS. Application to (spiked) water samples shows good analytical performance in terms of recovery (95.4 to 106.8%), linear range (4.4 to 66 ng⋅mL −1 for BPA, 2.5 to 75 ng⋅mL −1 for BPS) and correlation coefficients (>0.98). In our perception, the method represents a simple route for the fabrication of colorimetric multi-level DNA circuits. It may shorten the gap between bioelectronic logic circuits and high throughput real sample analysis.
Illustration of sample extraction treatments (SET) of bisphenol A (BPA) and bisphenol S (BPS) and the three-input IMPLY1-IMPLY2 logic operation with BPA, BPS and anti-BPA aptamer as inputs.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2017
·Vol. 409
·期 8
·2239-2246
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IF 3.431
Zhang Jie,Zhang Tiehua,Guan Tianzhu,Yu Hansong,Li Tiezhu
Widespread use of bisphenol A (BPA) and other bisphenol analogues has attracted increasing attention for their potential adverse effects. As environmental endocrine-disrupting compounds (EDCs), bisphenols (BPs) may activate a variety of nuclear receptors, including glucocorticoid receptor (GR). In this work, the binding of 11 BPs to GR was investigated by fluorescence polarization (FP) assay in combination with molecular dynamics simulations. The human glucocorticoid receptor was prepared as a soluble recombinant protein. A fluorescein-labeled dexamethasone derivative (Dex-fl) was employed as tracer. Competitive displacement of Dex-fl from GR by BPs showed that the binding affinities of bisphenol analogues were largely dependent on their characteristic functional groups. In order to further understand the relationship between BPs structures and their GR-mediated activities, molecular docking was utilized to explore the binding modes at the atomic level. The results confirmed that structural variations of bisphenol analogues contributed to different interactions of BPs with GR, potentially causing distinct toxic effects. Comparison of the calculated binding energies vs. experimental binding affinities yielded a good correlation ( R
2 = 0.8266), which might be helpful for the design of environmentally benign materials with reduced toxicities. In addition, the established FP assay based on GR exhibited the potential to offer an alternative to traditional methods for the detection of bisphenols.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2016
·
IF 3.926
Lingling Wang,Zhenzhen Zhang,Jing Zhang,Lei Zhang
The synthesis of a magnetic nanoporous three dimensional graphene (3DG) / ZnFe 2 O 4 composite has been achieved. Through formation of graphene hydrogel, ZnFe 2 O 4 magnetic particles was successfully introduced into the nanoporous 3DG, resulting in a magnetic porous carbon material. The morphology, structure, and magnetic behavior of the as-prepared 3DG / ZnFe 2 O 4 were characterized by using the techniques of SEM, XRD, BET, VSM, FTIR, Raman and TGA. The 3DG / ZnFe 2 O 4 has a high specific surface area and super paramagnetism. Its performance was evaluated by the magnetic solid-phase extraction of nine bisphenol analog s (BPs) from water samples followed by HPLC analysis, and showed excellent adsorption capability for the nine target compounds. Under optimized condition, the lower method detection limits (0.05–0.18 ng mL −1 ), the higher enrichment factors (800 fold) and good recoveries (95.1–103.8%) with relative standard deviation (RSD) values less than 6.2% were achieved. The results indicated that the developed method based on the use of 3DG / ZnFe 2 O 4 as the magnetic adsorbent has the advantages of convenience and high efficiency, and can be successfully applied to detect the nine BPs in real water samples.
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JOURNAL OF SOILS AND SEDIMENTS
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2017
·Vol. 18
·期 3
·845-851
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IF 2.522
Guan Tianzhu,Sun Yonghai,Zhang Tiehua,Li Tiezhu,Li Zhuolin,Zhang Yue,Zhang Jie,Wang Yongjun
Purpose Extensive use of bisphenol A (BPA) and its analogues has caused increasing concern over the potential adverse health impacts of these chemicals. The aim of this study was to develop a fluorescence polarization (FP) assay to detect bisphenol A, bisphenol AF (BPAF), tetrabromobisphenol A (TBBPA), and tetrachlorobisphenol A (TCBPA) simultaneously. Materials and methods A recombinant peroxisome proliferator-activated receptor α ligand binding domain (mPPARα-LBD*) was chosen as recognition element in developed FP procedure. The environmental soil samples were assayed for (1) analytical parameters, (2) matrix effect, (3) recovery experiment, and (4) HPLC validation. For statistical analysis, GraphPad Prism 5 software was used. Results and discussion Under the optimized conditions, this assay had an IC 50 of 2.80, 6.84, 4.67, and 4.66 μg g −1 for BPA, BPAF, TBBPA, and TCBPA, respectively. The developed assay demonstrated the limits of detection (LODs) of 0.35, 0.21, 0.27, and 1.03 μg g −1 for these four compounds, which could meet the requirement of environmental monitoring. For spiked soil samples, mean recoveries of the analytes ranged from 85.3 to 101.1%, yielding coefficient of variations (CVs) ranged from 9.8 to 17.5%. Conclusions In this study, a broad-specificity receptor protein for BPA, BPAF, TBBPA, and TCBPA was produced and was used to develop an FP assay in soil samples. The efficiency and simplicity of the proposed assay define its possible application as a screening tool for environmental monitoring.
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FOOD CHEMISTRY
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2017
·
IF 4.529
Dezhi Yang,Xiaolan Li,Dongling Meng,Meng Wang,Yaling Yang
A magnesium–aluminum layered double hydroxides coated on magnetic nanoparticles (Fe 3 O 4 @MgAl-LDHs NPs) combined with the supramolecular solvents (SUPRASs) as the magnetic supramolecular fluids were successfully applied to the extraction and determination of four phenolic compounds (Bisphenol-A (BPA), bisphenol-AF (BPAF), tetrabromobisphenol-A (TBBPA) and 4-tert-octylphenol (4-TOP)). Magnetic supramolecular fluids (ferrofluids) composites were prepared through adding the mixture of n -octanol and tetrahydrofuran in distilled water as the supramolecular solvents into the solution containing magnetic Fe 3 O 4 @MgAl-LDHs NPs. Under the optimized conditions, the calibration curve was obtained in range of 5–1000 μg L −1 . The limits of detection (S/N = 3) for BPA, BPAF, TBBPA and 4-TOP, were obtained for 0.54, 0.48, 0.37 and 0.63 μg L −1 , respectively. The intra-day and inter-day precision (RSDs %) for bisphenols (BPs) and 4-TOP at 100 and 300 μg L −1 were in the range of 4.0–7.8. The enrichment factors were between 16 and 24.
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RSC Advances
·
2017
·Vol. 7
·期 31
·19136-19144
·
IF 3.108
Zhenzhen Cai,Qixuan Yu,Yang Zheng,Xiaoyu Shi,Xuesong Wang,Zhanchen Cui,Zuosen Shi,Changming Chen,Daming Zhang
Fluorinated polycarbonates containing dodecyl groups (AF-Ali-PC EPs), biphenyl groups (AF-Ar-PC EPs), and cross-linkable epoxy groups were synthesized to investigate the effects of the flexibility of monomers on the properties of thermo-optic waveguide devices. Transparent polymer films were prepared via photocuring of a solution (FPRs) containing AF-Ali-PC EPs or AF-Ar-PC EPs, a photo initiator, and cyclopentanone. The optical films have low surface energies and roughnesses, high thermal stabilities, and tunable refractive indices. Straight optical waveguide and MZI thermo-optic waveguide switch arrays were fabricated using Ali-PR 1 and Ar-PR 1. The propagation losses of the channel waveguides, measured by the cutback method, were 0.21 dB cm−1 and 0.19 dB cm−1 at the monitoring light of 1550 nm for the Ali-PR 1 and Ar-PR 1, respectively. The rise and fall times of the thermo-optic switch upon application of a 200 Hz square-wave voltage were 1.822 ms and 1.364 ms, respectively, for Ali-PRs and 2.994 ms and 2.301 ms, respectively, for Ar-PRs at the square-wave voltage of 110 Hz. The insertion loss and extinction ratio were measured to be 9.2 dB and 12.0 dB for the aliphatic segment-containing photoresists and 8.9 dB and 12.3 dB for the aromatic segment-containing photoresists, respectively. The applied electric powers were 15.0 mW and 20.0 mW, which were also the switching powers. In contrast with our previous work, fluoro-polycarbonates containing aliphatic segments were more suitable for optical waveguide devices than those containing aromatic segments.
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Food Bioscience
·
2024
·
IF 4.8
Cheng Yang,Yan Wang,Pei-Zhi Dong,Yanan Li,Yue-Hong Pang
Bisphenols (BPs) pose a pervasive threat to human health due to their potential to leach from plastic packaging into food, thereby endangering the endocrine system. Given their low concentrations in complex samples, the development of a swift, efficient pretreatment method is imperative. In this study, a magnetic covalent organic framework (Fe 3 O 4 @TzDa) was synthesized via a layer-by-layer growth approach, utilized in rapid magnetic solid-phase extraction (MSPE) combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the determination BPs. This method exhibited remarkable sensitivity, detecting five BPs (BPS, BPF, BPA, BPB, and BPAF) at levels between 0.68 and 0.77 μg L −1 . Fe 3 O 4 @TzDa nanocomposites maintained an extraction efficiency of approximately 98.0% over five cycles, ensuring robust and repeatable performance. Sample analysis, encompassing plastic bottled water, pear juice, mix juices, pop-top canned curry beef, and box-packed milk, yielded recoveries of 72.0%–114.0% (RSDs <7.5%, n = 5). Furthermore, BPs migration in sports cups and portable bottles was evaluated, revealing migration levels ranging from 0.0014 to 0.0058 mg kg −1 . This study advances BP analysis by introducing a reliable method for their efficient determination in beverage samples from plastic food packages. The utilization of Fe 3 O 4 @TzDa underscores a pivotal advancement in sample preparation, enhancing both sensitivity and efficiency for the extraction and determination of BPs in food samples.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Cheng Qin,Yumeng Qi,Qing Zheng,Xiaolei Teng,Ahmed A. Allam,Ahmed Rady,Zunyao Wang,Ruijuan Qu
In this study, we conducted a systematic study of bisphenol AF (BPAF) removal by visible light coupled zero valent iron activated persulfate (Vis/Fe 0 /PS) system. The results showed that in Fe 0 /PS system, the removal rate of BPAF increased by 46.4% with the addition of Vis. New mechanisms were proposed: that PS became excited under Vis irradiation, which favored its reaction with Fe 2+ to produce more free radicals. Moreover, Fe 3+ could form complex with mono-hydroxylated and mono-carboxylated intermediate of BPAF, and the photoinduced ligand-metal charge transfer (LMCT) process could effectively transfer the charge to the metal ion, accelerating the reduction of Fe 3+ to Fe 2+ to enhance the generation of free radicals. The generation of hydroxylation products of bisphenol AF in the Vis/Fe 0 /PS system was greatly increased compared to the Fe 0 /PS system. The Vis/Fe 0 /PS system had a great application prospect, as it reduced the economic cost of treating bisphenol AF by at least 49.5% compared to other methods. Moreover, 99.6% of bisphenol AF was degraded after 45 min of reaction under natural light. Findings of this study provides new insights into the synergistic role of Vis in Fe 0 /PS systems and may advance the practical application of Vis/Fe 0 /PS system in water and wastewater treatment.
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REACTIVE & FUNCTIONAL POLYMERS
·
2017
·
IF 3.151
Caizhao Liu,Mingming Sun,Bin Zhang,Xugang Zhang,Jianhui Li,Lei Wang,Gang Xue,Ming Zhao,Caiyu Song,Qili Li
Acetylene-terminated benzoxazines (A-BOZs) were copolymerized with bisphenol A diglycidyl ether (DGEBA) epoxy resin to improve their processibility and adhesive properties without sacrificing much thermal performance. The three possible polymerization reactions for A-BOZs/DGEBA blends were monitored by differential scanning calorimetry (DSC) analysis and Fourier transform infrared (FTIR) spectroscopy. The rheological characterization showed that a much wider processing window could be obtained for A-BOZs/DGEBA because of the dilution effect of the epoxy. The lap shear strength of A-BOZs improved significantly with the incorporation of DGEBA . Furthermore, the cured blends also showed good heat and water resistance properties and high glass transition temperature (Tg).
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危险品化学品经营许可证（带存储）