Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 6
·2124-2132
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IF 1.637
Wang Zirui,Wang Xinyu,Li Jingfang,Li Weizuo,Li Guangming
In this work, a facile and fast luminescence sensing platform for the ratiometric detection of hydrogen sulfide (H 2 S/HS − ) has been constructed by encapsulating the Eu 3+ /β-diketone chromophore into the host framework of MIL-140 (Eu 3+ /TFA@MIL-140C, TFA = 1,1,1-Trifluoro-2,4-pentanedione). It is well known that the energy transfer from the host framework or/and TFA to the Eu 3+ ions can be disturbed easily by some metal ions, such as Cu 2+ ions. Therefore, the ratiometric sensor was constituted with the Eu 3+ /β-diketone moiety as the response signal and the host framework moiety as the reference signal. Furthermore, on the basis of the hard–soft acid–base theory, the Cu 2+ ions could be rapidly caught by HS − , profiting from the low solubility of CuS, realizing the real-time detection by luminescence color change. This sensor shows remarkable property on the detection of H 2 S (HS − in water solution) with low limit of detection (LOD = 7.43 μM) and short response time (< 0.5 min). The good linearity between luminescent intensity and concentration makes the luminescent ratio meter feasible.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
高影响因子
FOOD CHEMISTRY
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2025
·
IF 9.8
Minhai Liu,Yan Zhang,Rui Cheng,Ting Tan,Lan Guo,Fan Liu,Yiqun Wan
An efficient and rapid ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MSMS) method was developed for simultaneous determination of 5 alternaria toxins (ATs) in edible and medicinal plant - peppermint using MOF-808-trifluoroacetic acid (MOF-808-TFA) as the adsorbent. Characterization methods such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N 2 adsorption-desorption demonstrated that the synthesized MOF-808-TFA had a regular ortho-octahedral configuration and high specific surface area. Under the optimal conditions, the 5 ATs showed good linearity (R 2 ≥ 0.9993) in their respective concentration ranges. The limits of quantifications (LOQs) of the method ranged from 0.21 to 0.48 μg/L, and the recoveries were 77.8–118.2 %, with the relative standard deviations (RSDs) less than 8.9 %.
研究领域:
分析化学
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食品科学
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植物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Zhiwen Tang,Timothy M. Vogel,Qing Wang,Changlong Wei,Mukhtiar Ali,Xin Song
In this study, the biodegradability of trifluoroacetate (TFA), perfluorooctanoic acid (PFOA), and perfluoro-2-methyl-3-oxahexanoic acid (HFPO-DA) by a native microbial community was evaluated over a 10-month incubation period. The observed microbial defluorination ratios and removal efficiency were 3.46 ( ± 2.73) % and 8.03 ( ± 3.03) %, 8.44 ( ± 1.88) % and 13.52 ( ± 4.96) %, 3.02 ( ± 0.62) % and 5.45 ( ± 2.99) % for TFA, PFOA and HFPO-DA, respectively. The biodegradation intermediate products, TFA and pentafluoropropionic acid (PFA), of PFOA and HFPO-DA were detected in their biodegradation treatment groups. Furthermore, the concentrations of the PFOA metabolites, perfluorohexanoic acid (PFHxA) and perfluoroheptanoic acid (PFHpA), in the aqueous solutions after incubation were quantified to be 0.21 and 4.14 µg/L. TFA, PFOA and HFPO-DA significantly reduced the microbial diversity and changed the structure of the community. The co-occurrence network analysis showed that low abundance species, such as Flexilinea flocculi , Bacteriovorax stolpii , and g_Sphingomonas , are positively correlated with the generation of fluoride ion, implying their potential collaborative functions contributing to the observed biodefluorination. The findings in this study can provide insights for the biodegradation of perfluoroalkyl carboxylic acids and their emerging alternatives by indigenous microorganisms in the environment.
研究领域:
环境微生物学
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生物修复
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化学生态学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Mengying Liu,Jia Gao,Huixiao Yang,Yidi Zhang,Xinzhu Huang,Kaoqi Lian,Li Ma
Perfluorinated compounds (PFCs) are a class of widely distributed persistent organic pollutants (POPs), attracting increased attention. Consequently, there is an urgent demand for sensitive, reliable, and high-throughput methods to detect PFCs. This study used a monomer-mediated in situ growth strategy to design and synthesize Fe 3 O 4 @TFA–TAPA–COF. Accordingly, a novel method based on Fe 3 O 4 @TFA–TAPA magnetic solid-phase extraction combined with ultra-high-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) was developed to detect 22 ultra trace PFCs from water and honey samples. Several techniques used to characterize Fe 3 O 4 @TFA–TAPA–COF showed that it had a porous structure with a large surface area (102.84 m²/g). Under optimized parameters, the ranges for the limit of detection (LOD) in water and honey were 0.42–23.44 pg/L and 3.36–187.52 pg/kg, respectively. The results indicated that Fe 3 O 4 @TFA–TAPA–COF had high selectivity, high adsorption ability, and reusability. Additionally, the proposed method exhibited good accuracy, low LOD, and good reproducibility. This method was successfully applied to determine PFCs in 54 tap water and 40 honey samples in Shijiazhuang, China, and provided methodological reference and technical support for the risk monitoring of food quality and safety.
研究领域:
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
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jinshui Duan,Ruijun Jia,Kangning Liu,Mingyang Yu,Quanjiang Lv,Shahid Hussain,Sameh M. Osman,Jun Dai,JunLin Liu,Chunxia Wu
Perovskite quantum dots (QDs) have garnered significant interest for their superior optical properties . Despite their attractive photovoltaic properties and chemical processing ability, the high defects density within QDs can result in the annihilation of luminescence. In this study, cesium trifluoroacetic acid (CsTFA) was used as the cesium source, replacing conventional cesium carbonate (Cs 2 CO 3 ) and introducing TFA ligands to improve the luminescence quality of QDs . As well as doping with Zn 2+ to enhance both the stability and luminescence quality of the quantum dot solution. The doped QDs exhibit the highest photoluminescence (PL) intensity, which is further enhanced by the perovskite QDs with TFA as a ligand. Furthermore, the PL spectra of CsPbBr 3 and TFA-CsPbBr 3 : Zn (10 %) QDs with the temperature changes have also been analyzed. The result reveals the relationship between excitons and phonons . Based on the result, Zn 2+ doped and TFA ligand induced perovskite QDs have the potential to serve as an optimal material.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Xuening Feng,Huanyu Liu,Hanjun Liu,Xuebin Jiang,Liwei Shen,Yuqi Tang,Qian Qu,Dong Xiang,Xuemin Yan,Yuanzhu Mi
A new type of ionic liquid demulsifier with double hydrophilic and hydrophobic chains (HDEA-TFA) was synthesized through the quaternization and replacement reaction. The chemical structure of HDEA-TFA was identified by 1 H NMR and FT-IR. It could be applied as an excellent demulsifier for two water-in-crude oil (W/O) emulsions (m water :m oil = 70:30 and m water :m oil = 30:70). The effect of demulsification conditions such as concentration of HDEA-TFA, settling time, demulsification temperature, pH value and salinity on the demulsifying efficiency (DE) of the W/O emulsions were discussed in detail. The results showed that the demulsifying efficiency (DE) of HDEA-TFA in the two W/O emulsions could reach 100 % with the concentration of 500 mg/L at 60 °C within 120 min. Also, HDEA-TFA had excellent acidic, alkaline and salt resistance. Moreover, several commercial demulsifiers were compared to evaluate the demulsifying performance of HDEA-TFA. The dynamic interfacial tension (IFT), surface tension (ST), three-phase contact angle (CA), elasticity modulus (EM) and zeta potential were used to investigate the demulsifying mechanism. The current study developed a new type of ionic liquid demulsifier with excellent performance and provided a reference for the research of demulsification mechanism.
研究领域:
化学工程
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石油工程
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
·
IF 5.141
Wei Qi,Qiaolin Wu,Wen Wang,Jing Feng,Qing Su
Covalent organic frameworks (COFs) with pre-designed structures and superior photophysical properties have attracted significant attention due to their applications in photocatalysis. In this research, an imine-linked fluorinated 2D-COF (TFA-TTA-COF) material was feasibly fabricated from polycondensation of 2,3,5,6-tetrafluoroterephthalaldehyde (TFA) and 4,4′,4′'-(1,3,5-triazine-2,4,6-triyl)trianiline (TTA) in solvent-thermal methods. The TFA-TTA-COF material exhibited excellent crystallinity, high Brunauer-Emmett-Teller surface area of 1504 m 2 ·g −1 , and superior thermal and chemical stability. Considering the advantages of enhanced light absorption, effective charge separation and charge transfer, the prepared TFA-TTA-COF was employed as photocatalyst for the degradation of dyes. The degradation efficiencies of Eriochrome Black T (EBT) and Eriochrome Black A (EBA) dye in water could attain 89 % and 82 %, respectively. Furthermore, TFA-TTA-COF was found to show satisfactory photocatalytic performance with high conversion and selectivity in the photo-driven oxidative coupling of benzylamines. This work demonstrated the important contributions to the development of heterogeneous COFs-based photocatalysts.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 11
·2814
·
IF 4.35
Manli Wu,Wangang Zhang,Xixi Shen,Wei Wang
Chinese chicken broth is well known for its outstanding nutritional value and flavor, widely consumed in China. This study was designed to develop a sensitive and accurate high-performance liquid chromatography-variable wavelength detector (HPLC-VWD) method to simultaneously determine purines and uric acid in Chinese chicken broth for gout and hyperuricemia dietary management. Chromatographic separation was performed on an Agilent TC-C18 (2) column (4.6 mm × 250 mm, 5.0 µm), using 0.02 M KH2PO4(pH 4.0) as a mobile phase. Sample pretreatment was optimized to enable the extraction of all analytes from Chinese chicken broth. The optimal pretreatment conditions were chicken broth-60% trifluoroacetic acid (TFA)/20% formic acid (FA) (1:1,v/v) in a volume ratio of 1:3 and hydrolysis for 40 min at 85 °C in a water bath. The limits of detection (LODs) and limits of quantification (LOQs) of the purines and uric acid were 0.58–1.71 µg/L and 1.92–5.70 µg/L, respectively. The recoveries were 91–101%, with the relative standard deviations (RSDs) lower than 3%. The complete method has been successfully applied to determine purines and uric acid in various Chinese chicken soups obtained from different provinces in China.Keywords:Chinese chicken broth;purine;uric acid;HPLC;acid hydrolysis;hyperuricemia;gout
研究领域:
食品科学
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分析化学
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营养学
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY & BIODIVERSITY
·
2021
·Vol. 18
·期 3
·e2000864
·
IF 2.408
Yijia Qi,Weiming Ren,Haixia Zhang,Gang Chen,Weiyi Huang,Xuexia Li,Jie He,Weichun Zhao
Veronicastrum axillare polysaccharides (VAP) were isolated by cellulase-assisted digestion. The optimum conditions (2 % cellulase, 47 °C for 2.5 h, then, 95 °C for 2.5 h, pH 4.1, solid/liquid ratio 1 : 7.6) were identified by a combination of single factor optimization and response surface DOE (design of experiment) methods, and achieved a yield of 4.7 %. Treatment with 1 % TCA for 10 min, then, 2 % DEAE-cellulose removed protein and colored impurities. Purified VAP retained most of the radical-scavenging activities and GES-1 cell protection capability in vitro , indicating VAP were the key active components of V. axillare . Some molecular features were identified by FT-IR and NMR analyses. The molecular weight was estimated from DOSY NMR experiments to be around 21 kDa. There were 6.3 % uronic acid residues in the VAP. The constituent sugars after TFA hydrolysis were identified by HPLC to include glucose, arabinose, rhamnose, galactose, and xylose in a molar ratio of 405 : 259 : 82 : 42 : 1.
研究领域:
生药学
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生物化学
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药学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）