JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 313
·期 2
·309-318
·
IF 1.282
Wang Zhipeng,Huang Huang,Ding Songdong,Hu Xiaoyang,Zhang Lirong,Liu Ying,Song Lianjun,Chen Zhili,Li Shimeng
Abstract Two diglycolamide homologs, N,N,N′,N′ -tetraoctyl-3,6-dioxaoctane diamide (DOODA) and N,N,N′,N′ -tetraoctyl-3,6,9-trioxaundecane diamide (TOUDA), were synthesized. Their extraction behaviors of Am 3+ and Eu 3+ were investigated and compared with those of N,N,N′,N′ -tetraoctyl-3-oxapentane diamide (TODGA). The extraction ability toward Am 3+ and Eu 3+ decreased with increasing etheric oxygen number in the extractant structure. In contrast to TODGA, an very interesting inversion on the selectivity occurred for DOODA and TOUDA, which were more favor of extracting Am 3+ than Eu 3+ . The maximum SF
Am/Eu of 3.5 for DOODA can be achieved at 3.0 mol/L HNO 3 . The stoichiometries of extracted species and extraction thermodynamic parameters were also presented. Graphical Abstract
研究领域:
化学
·
核化学与放射化学
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DOI
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Hongru Zhao,Chengqiang Hu,Na Sui,Xinyu Liu,Junlian Wang
Zr/Hf separation has always been a great challenge. Although the methyl isobutyl ketone (MIBK)-thiocyanic acid (HSCN) extraction system selectively extracts Hf over Zr and can realize Zr/Hf separation, it has the following disadvantages: it has a strong smell; it is easy to burn; and there is large loss of extractant during extraction due to the low boiling point (115.7 °C), low flashing point (13 °C), and high solubility of MIBK in water (1.7 % at 25 °C). In this study, Zr/Hf separation performance by MIBK homologues — of which one side of C = O is iso pentyl, iso hexyl, n -pentyl, n -hexyl or n -heptyl, while the other side are all methyl — were studied and compared with MIBK. Effects of HSCN pre-extraction, HCl concentration, NH 4 SCN concentration on Zr, Hf extraction and separation performance were investigated. Relationships between methyl alkyl ketone structure and their Zr/Hf separation performance were revealed. A new Zr/Hf separation system MNPK (methyl n -pentyl ketone)-HSCN was found. MNPK has a higher boiling point (151 °C), a higher flashing point (47 °C) and a lower solubility in water (0.43 % at 20 °C) than MIBK. Compared to MIBK, it is safer, more friendly operation environments and less extractant loss during extraction. MNPK has as fast extraction kinetics as MIBK. It also has good anti-emulsification performance. Its maximum β Hf/Zr can reach to 12.61. The loaded Zr and Hf in MNPK have very similar stripping behaviors with those loaded in MIBK by HCl and H 2 SO 4 solutions, respectively. MNPK is the most possible candidate to replace MIBK from HSCN media in Zr/Hf separation industry.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
ACS Materials Letters
·
2023
·
IF 11.4
Xueying Fan,Miao Xu,Weizhe Liu,Aleksandr Kuchmizhak,Lorenzo Pattelli,Yao Li,Hongbo Xu
Traditional environmental photonic sensing based on the balanced reflection of a photonic structure can hardly be applied to distinguish molecular size and homologues, since the refractive index change introduced by these analytes can be too similar to be unambiguously distinguished. Here, a sensing method based on the pore size selectivity and organics adsorption–desorption capacity of self-assembled ZIF-8 photonics crystal is demonstrated, which can tell apart different molecular sizes, homologues, and organics with similar structures and physical properties. Specificity is improved by the inherent relationships between the pore size of ZIF-8 metal–organic frameworks and the associated molecular diffusion rates in the pores, so that the combination of the observed peak shift and recovery time are unique to each analyte. Using this method, selective detection of molecular size is also demonstrated in the case of linear vs cyclic molecules, since only the former can penetrate inside the ZIF-8 pores to induce a large wavelength shift. The reflection peak shift caused by the linear molecules was found to be about 30–40 nm, an order of magnitude larger compared to those for the cyclic molecules. A relationship between the diffusion rate of linear molecules in ZIF-8 pore and the recovery time of photonic crystal reflective peak is further established, linking the recovery time and the linear molecular diffusion coefficient. Finally, different linear molecules are identified by their associated recovery time to detect homologues or organics with similar refractive index.
研究领域:
材料科学
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环境科学
·
化学传感
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Xiaoliang Zeng,Zhou Long,Xiaofang Jiang,Yajun Zhang,Qi Liu,Jing Hu,Chenghui Li,Li Wu,Xiandeng Hou
Distinguishing the delicate structural differences among molecules is a critical and challenging task in biological/chemical analysis. A molecular decoding strategy has recently become promising to differentiate similar molecules, which is advantageous over the common sensing methods mostly used for detecting a single target. However, the design of an ideal molecular decoder is still strictly hindered by the tailored preparation of probes for particular molecules and the severe lack of widespread feasibility. We herein for the first time proposed to use single bimetallic lanthanide-based metal–organic frameworks (Ln-MOFs) as a powerful, versatile probe for fast and facile decoding of homologues, isomers, enantiomers, and even deuterated isotopomers, based on the unique host–guest interaction of a specific target with the Ln-MOF which could provide an according visual output based on the modulated energy transfer process.
研究领域:
化学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
LIQUID CRYSTALS
·
2020
·
IF 2.908
Duo Wang,Ruo-Yan Li,Yuan-Yuan Quan,Qing-Qing He,Mei Tian,Dan-Shu Yao
Twenty novel azobenzene liquid crystal micromolecular compounds named ω-[4-(p-substituted azobenzeneoxy carbonyl]acid (X-ABCnA) have been designed and synthesised, followed by studies on the thermal performance and mesomorphic properties of the compounds. The liquid crystal compounds were divided into five homologous series based on the terminal substituents R (R = CH3O, CH3, H, Cl, NO2). In each series, the number of carbons on flexible chain was 4, 6, 8 and 10, respectively. Fourier-transform infrared, proton nuclear magnetic resonance and elementary analysis demonstrated that the structure of the synthesised azobenzene liquid crystal compounds was consistent with the molecular design. The mesomorphic properties were tested, analysed and characterised by using differential scanning calorimetry and polarised optical microscopy. The melting transition (Tm) of all the compounds in homologous series with different substituents appeared to decrease with the increase of carbon numbers on flexible chains. The same held true for the temperature of isotropic-mesophase/crystalline transition. The compounds with stronger polarity of terminal substituents were more likely to form broader mesogenic ranges. The liquid crystal compounds discussed in this work can be regarded as a reference for the synthesis of mesogenic arms participating in the synthesis of novel multi-arm liquid crystalline macromolecules and polymers.
研究领域:
材料科学
·
有机化学
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产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2022
·
IF 4.01
Yunping Zhoujin,Yuping Li,Peng-Yu Liang,Pan-Pan Zhou,Sean Parkin,Tonglei Li,Faquan Yu,Sihui Long
A series of homologues (1–4) of fenamic acid have been synthesized by varying the length of the linker between the two aromatic rings, and their polymorphism has been investigated. Under the same crystallization conditions, each of the newly synthesized compounds leads to two forms, except for compound 1, which indicates that additional flexibility due to homologation does not necessarily lead to more polymorphs. The molecules in each polymorphic system show different conformations due to the rotation about specific sigma bonds. Phase transitions are observed between the polymorphs of each system. Conformational analysis and Hirshfeld surface analysis were applied to investigate the effect of conformational flexibility on the polymorphism of these compounds.
研究领域:
化学
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材料科学
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DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Songbo Wei,Xiaoxue Kou,Yan Liu,Fang Zhu,Jianqiao Xu,Gangfeng Ouyang
Encapsulating functional nanomaterials within the bulk of metal-organic frameworks (MOFs) offers the opportunity to construct high-performance hybrid coating materials for solid phase microextraction (SPME). In this work, we proposed the facile synthesis of a superhydrophobic MOF composite material ( NS ZIF-8 Si ) by growing ZIF-8 on Mn x O y nanosheet (NS) and subsequently depositing short-chain polysiloxane on the surface of the composite. A novel SPME fiber was successfully prepared based on the NS ZIF-8 Si composite. The NS ZIF-8 Si fiber possessed outstanding thermal stability (up to 450 °C). In headspace SPME of BTEX, the home-made fiber exhibited extraction efficiencies much higher than the commercially available PDMS fiber. This phenomenon was due to the synergetic cooperation of the π-π stacking and the hydrophobic interactions between the NS ZIF-8 Si coating and the analyte molecules, as well as the increased aspect ratio of the MOF grown on the nanosheet. The established method achieved wide linearity (5–2000 ng L −1 ) and low LODs (0.02 ng L −1 to 0.21 ng L −1 ). Satisfactory recoveries were obtained in the analysis of real water samples collected from the Pearl River, indicative of the good reliability of the established method for real-scenario applications. This work might provide critical insights in constructing novel NS/MOF composite materials for the development of high-performance SPME fiber coatings.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Lei Chen,Daijie Chen,Shunyi Zhou,Jieying Lin,Yun Liu,Xiongfei Huang,Qingqi Lin,Jean Louis Morel,Zhuobiao Ni,Shizhong Wang,Rongliang Qiu
Hexafluoropropylene oxide (HFPO) homologues, which are important alternatives to perfluorooctanoic acid, have been frequently identified in crops. Although exposure to HFPO homologues via crops may pose non-negligible threats to humans, their impact on crops is still unknown. In this study, the accumulation, transport, and distribution mechanisms of three HFPO homologues in lettuce were investigated at the plant, tissue, and cell levels. More specifically, HFPO trimer acid and HFPO tetramer acid were primarily fixed in roots and hardly transported to shoots (TF, 0.06–0.63). Conversely, HFPO dimer acid (HFPO-DA) tended to accumulate in lettuce shoots 2–264 times more than the other two homologues, thus resulting in higher estimated daily intake values. Furthermore, the dissolved organic matter derived from root exudate enhanced HFPO-DA uptake by increasing its desorption fractions in the rhizosphere. The transmembrane uptake of HFPO homologues was controlled by means of a transporter-mediated active process involving anion channels, with the uptake of HFPO-DA being additionally facilitated by aquaporins. The higher accumulation of HFPO-DA in shoots was attributed to the larger proportions of HFPO-DA in the soluble fraction (55–74%) and its higher abundance in both vascular tissues and xylem sap. Our findings expand the understanding of the fate of HFPO homologues in soil–crop systems and reveal the underlying mechanisms of the potential exposure risk to HFPO-DA.
研究领域:
环境科学
·
植物学
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DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2025
·
IF 6.1
Mei-Ling Le,Yi-Qi Wan,Jia-Yu Xue,Shi-Yi Deng,Bin-Hui Wang,Li-Hai Wu,Hou-Peng Wang,Yang-Yang Yuan,Xiao-Dong Kuang,Tao Luo,Da-Lei Zhang
Hexafluoropropylene oxide (HFPO) homologues (HFPOs), presenting HFPO-dimeric acid (DA), HFPO-trimeric acid (TA) and HFPO-tetrameric acid (TeA), are emerging replacements for legacy perfluorooctanoic acid that are increasingly used for a variety of industrial applications. These novel fluorinated compounds have attracted much attention due to their environmental ubiquity and potential toxicities. However, there is a lack of clarity about their toxicological impact on male reproductive health. In our study, the mouse model was used to investigate the toxic effects of HFPOs on male reproductive function and their underlying mechanisms. The results revealed that male mice exposed to HFPOs for 8 weeks presented structural and functional abnormalities in the testis and mature sperm, as evidenced by destructed seminiferous tubule, decreased testosterone levels and sperm quality. Furthermore, treatment with HFPOs elevated reactive oxygen species and malondialdehyde content and diminished superoxide dismutase activity and succinate dehydrogenase levels, along with downregulated anti-apoptotic BCL-2 expression and upregulated pro-apoptotic BAX expression. Moreover, oral administration of HFPOs impaired testicular mitochondrial structure along with reduction in ATP content and mitochondrial DNA copy number and disruption of mitochondrial dynamics. In summary, HFPOs can impair male fertility by disrupting spermatogenesis and reducing sperm quality through multiple mechanisms, including mitochondrial dysfunction-induced oxidative stress, apoptosis, and suppression of steroidogenesis. This work aims to improve our comprehension regarding the potential risks and adverse impacts of exposure to HFPO congeners on male reproductive health.
研究领域:
毒理学
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生殖生物学
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环境健康科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2018
·Vol. 41
·期 10
·2197-2206
·
IF 2.415
Xiafei Guo,Faqiong Zhao,Baizhao Zeng
We report the electrochemical fabrication of a poly(2,2-bithiophene-co-3-methylthiophene)-graphene composite coating and its application in the headspace solid-phase microextraction and gas chromatography determination of benzenes (i.e., bromobenzene, 4-bromotoluene, 2-nitrotoluene, 3-nitrotoluene and 1,2,4-trichlorobenzene). The coating was uniform and showed cauliflower-like microstructure. It had high thermal stability (up to 375°C) and could be used for at least 180 times of solid-phase microextraction without a decrease in extraction performance. Furthermore, it presented high extraction capacity for the benzenes due to the hydrophobic effect and π–π interaction between the analytes and the coating. Under optimized extraction conditions, good linearity (correlation coefficients higher than 0.9946), wide linear range (0.01–50 μg/L), and low limits of detection (5.25–12.5 ng/L) were achieved for these analytes. The relative standard deviation was lower than 5.7% for five successive measurements with one fiber, and the relative standard deviation for fiber-to-fiber was 4.9–6.8% ( n = 5). The solid-phase microextraction and gas chromatography method was successfully applied for the determination of three real samples, and the recoveries for standards added were 89.6–106% for nail polish, 85.8–110% for hair dye, and 90–106.2% for correction fluid, respectively.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2015
·
IF 5.8
Yangyang Lu,Guoqiang Yu,Wen-Jun Wang,Qilong Ren,Bo-Geng Li,Shiping Zhu
We report the design and development of a series of novel ionic liquid polymers (PILs) which possess thermoresponsive properties in organic solvent. The PILs were synthesized via reversible addition–fragmentation chain transfer (RAFT) copolymerization of 1-vinyl-3-butylimidazolium bromide and N-isopropylacrylamide, followed by anion exchange of bromide to amino acid d-alanine. The PILs possessed 0.36–0.76 molar fraction of ionic liquid with number-average molecular weight of 2.70–8.17 kg/mol and polydispersity index ranging between 1.12 and 1.25. The copolymerizations followed first-order reaction kinetics, and they were well-controlled, as indicated by the linear increase of molecular weight with monomer conversion. The PILs were thermoresponsive in acetonitrile with upper critical solution temperatures (UCST) varying from 25.7 to 34.8 °C, owing to the introduction of anion of amino acid. The PILs could be completely precipitated out by lowering the solution temperature. The PIL/acetonitrile solutions were used as extract phase for separation of tocopherol homologues in hexane. The distribution coefficient of δ-tocopherol between the extract and raffinate phases (Dδ) and the selectivity coefficient of δ-tocopherol to α-tocopherol (Sδ/α) reached as high as 7.86 and 13.0, respectively, while Dβ&γ was 3.63 and Sβ&γ/α was 6.0. The mole ratio of α-tocopherol in the raffinate phase increased from 0.08 to 0.27 after one stage extraction. The PILs could be reused for multiple extraction cycles with negligible change in the tocopherol distribution and selectivity coefficients. The thermoresponsivity of the PILs is of great benefit by eliminating the normally required back extraction steps. This work demonstrates the potential of thermoresponsive polymers for use in high performance separation of natural products.
研究领域:
化学工程
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材料科学
·
分离技术
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产品关联
DOI
高影响因子
ACS Sensors
·
2022
·
IF 9.618
Hongting Ma,Peihao Cheng,Chuanrui Chen,Xiaodong Geng,Kaizhou Yang,Fengjuan Lv,Junlin Ma,Yue Jiang,Quanli Liu,Yan Su,Jian Li,Nan Zhu
Unhealthy alcohol inhalation is among the top 10 causes of preventable death. However, the present alcohol sensors show poor selectivity among alcohol homologues. Herein, Pt-coated truncated octahedron Au (Ptm@Auto) as the electrocatalyst for a highly selective electrochemical sensor toward alcohol homologues has been designed. The alcohol sensor is realized by distinguishing the electro-oxidation behavior of methanol (MeOH), ethanol (EtOH), or isopropanol (2-propanol). Intermediates from alcohols are further oxidized to CO2 by Ptm@Auto, resulting in different oxidation peaks in cyclic voltammograms and successful distinction of alcohols. Ptm@Auto is then modified on wearable glove-based sensors for monitoring actual alcohol samples (MeOH fuel, vodka, and 2-propanol hand sanitizer), with good mechanical performance and repeatability. The exploration of the Ptm@Auto-based wearable alcohol sensor is expected to be suitable for environmental measurement with high selectivity for alcohol homologues or volatile organic compounds.
研究领域:
材料科学
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医学
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环境科学
✓ 已验证
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）