WATER RESEARCH
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2021
·
IF 11.236
Lixiao Wang,Yajie Zheng,Yiran Zhou,Junhe Lu,Jean-Marc Chovelon,Yuefei Ji
Ketoprofen (KTF) is a nonsteroidal anti-inflammatory drug frequently detected in natural and engineering waters. Because KTF is particularly photolabile (half-life ∼4 min), knowledge of the fate and ecological risks of KTF photoproducts in the aquatic environment is especially essential. Herein, we systematically investigated the photophysics, photochemistry , and photosensitization of KTF photoproducts in aqueous solution under 365 nm irradiation (UV 365 ). Results show that KTF photolyzed rapidly and formed 3-ethyl- α -hydroxylbenzophenone (EtOH-BP), 3-ethyl- α -hydroperoxylbenzophenone (EtOOH-BP), 3-acetylbenzophenone (AcBP), and 3-ethylbenzophenone (EtBP), as identified by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and high-resolution mass spectrometry (HRMS). The presence of O 2 significantly affected the evolution of photoproducts during KTF photolysis. The photophysical properties of EtBP and AcBP were characterized by spectroscopic approaches. In particular, transient absorption spectra obtained by nanosecond laser flash photolysis (LFP) indicated that EtBP and AcBP were excited to triplet states with lifetimes of 28 and 2.4 µs, respectively. EtBP underwent further photodegradation , giving rise to EtOH-BP, EtOOH-BP, and AcBP upon UV 365 irradiation. The reaction is proposed to proceed through an excimer precursor ( 3 [EtBP···EtBP]*) followed by intramolecular H-abstraction. In contrast, AcBP was relatively photostable, particularly under aerated condition. Both EtBP and AcBP have strong photosensitizing activity, as evidenced by the triplet probe 4-( N,N -dimethylamino)benzonitrile (DMABN). ECOSAR program suggested that the photoproducts are more ecotoxic and bioaccumulative than the parent KTF. Results of this study underscore the need to scrutinize the formation and fate of KTF photoproducts in sunlit surface waters.
研究领域:
环境科学
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光化学
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毒理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 29
·期 1
·229
·
IF 4.6
Yunxia Wang,Ye Liu,Bo Liu,Yihua Yuan,Lixia Wei,Mingxiu Wang,Zhe Chen
Faced with rising threats of terrorism, environmental and health risks, achieving sensitive and selective detection of peroxide-based explosives (PEs) has become a global focus. In this study, a turn-on fluorescent probe (BOD) based on benzil (H2O2-recognition element) and 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) derivative (fluorophore) was developed to sensitively and specifically detect hydrogen peroxide (H2O2). The synthesized BOD had a very weak fluorescence due to intramolecular donor-excited photo-induced electron transfer (d-PET) effect; however, it could emit a strong fluorescence since H2O2selectively oxidized the benzil moiety and released free BODIPY fluorophore (BOD-COOH). As a result, the proposed BOD detected H2O2in linear detection ranged from 25 to 125 µM with a detection limit of 4.41 µM. Meanwhile, the proposed BOD showed good selectivity toward H2O2, which is not affected by other common reactive oxygen species (ROS) and ions from explosive residues. In addition, a blue shift from 508 to 498 nm was observed in the absorption spectra upon addition of H2O2. More importantly, the BOD was successfully applied for rapid detection of H2O2vapor with good sensitivity (down to 7 ppb), which holds great potential for practical use in public safety, forensic analysis and environmental monitoring.Keywords:turn-on fluorescence;benzil;BODIPY;hydrogen peroxide (H2O2);vapor detection
研究领域:
分析化学
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环境科学
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公共安全
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产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2017
·Vol. 123
·期 6
·1-4
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IF 1.455
Wen Xiaoyu,Pan Xiaona,Wu Libin,Li Ruinan,Wang Dan,Zhang Jinqiu,Yang Peixia
Lamellar tin deposits were prepared by galvanostatical electroplating from the aqueous acidic-sulfate bath, with gelatin and benzalacetone dissolved in ethanol (A BA+EtOH ) as additive, and their morphologies were investigated by scanning electron microscopy. Cathodic polarization curves revealed that the absorbability of A BA+EtOH on the cathode surface was higher than that of gelatin. X-ray diffraction analysis indicated preferred orientations of tin growth led to the formation of lamellar structure and distortion of tin lattice. The growth mechanism of lamellar tin was also discussed.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2022
·
IF 4.198
Shihai Lv,Ya-Nan Tian,Yanyan Yang,Chaoying Wen,Shiqing Li
An efficient one-pot synthesis of 1,1′-biisoquinolines by a three-component reaction of commercially available raw materials (benzils, NH4OAc, and alkynes) is disclosed. This complicated reaction involves in situ diimine formation via benzil-NH4OAc condensation, Rh(III)-catalyzed 2-fold imine-directed C–H activation, and annulation with alkynes. Both symmetric and unsymmetric 1,1′-biisoquinolines could be assembled in moderate to high yields. The reaction mechanism is supported through ESI-MS, in which Cp*ClRh+, Cp*(OAc)Rh+, Cp*(OPiv)Rh+, and two rhodacycle intermediates are successfully detected to explain the evolution of rhodium species.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Yuxiang Liu,Hao Wu,Han Yue,Xiwei Hu,Qunsheng Li,Hongkang Zhao
We have determined the solubility of 4,4′-dimethoxybenzophenone (DMBP) in ten monosolvents and three binary solvent mixtures at temperatures ranging from 293.15 to 333.15 K and at atmospheric pressure. The solubility of DMBP in both monosolvents and binary solvent mixtures increases with temperature. The solubility of DMBP is greatest in the solvent benzene and lowest in the solvent methanol. The Apelblat equation is the most suitable equation for DMBP in both monosolvents and binary solvent mixtures, based on the results of our solubility experiment data and the data calculated by the thermodynamic models. The outcomes of the KAT-LSER model indicate that π* and δH play a prominent role in the dissolution behavior of DMBP. The mixing thermodynamic properties (ΔmixG, ΔmixH, and ΔmixS) demonstrate that the mixing process of DMBP is an entropy-increasing and spontaneous process, and whether the process absorbs heat or not is related to the properties of the solvents.
研究领域:
化学
·
物理化学
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
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2024
·
IF 8.7
Baowei Yang,Xiandong Zhai,Runzhe Mei,Pu Wang,Yicheng Mei
A convenient and efficient method for undergraduate student experiments involves the one-pot synthesis of phenytoin from benzoin. This method utilized ultrasonic irradiation in the presence of basic catalyst at room temperature and atmospheric pressure, resulting in shortened reaction times, good yields, and excellent reproducibility. By employing a low-cost ultrasonic cleaner for ultrasonic irradiation in student experiments, the need for expensive equipment investment during the teaching process can be minimized. Consequently, this approach is suitable for widespread promotion and application in undergraduate education.
研究领域:
化学教育
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有机合成
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药学
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产品关联
DOI
PubMed
高影响因子
Insects
·
2025
·Vol. 16
·期 4
·403
·
IF 2.9
Xinyu Ma,Junjie Yan,Guangyuan Su,Fathiya M Khamis,Athanase Hategekiman,Yulin Gao
The potato tuber moth ( Phthorimaea operculella ) is a destructive pest that infests potato crops by boring into and eating the tubers. Although chemical pesticides are frequently employed to manage these moths, their efficacy is inconsistent and they can cause environmental damage. In this study, we investigated a natural alternative by examining specific volatiles emitted by potato plants that may repel the moths and inhibit oviposition. We identified five plant-based compounds, one of which, 4-ethylacetophenone, exhibited strong repellent effects against the moths at all tested concentrations and significantly reduced egg-laying behavior. This finding suggests that 4-ethylacetophenone could serve as an eco-friendly way to protect potato crops from P. operculella , providing a safer alternative to conventional pest control strategies. The potato tuber moth, Phthorimaea operculella (Zeller), is an important pest of potato crops capable of boring into and consuming the potato tubers. Although chemical insecticides are employed to control P. operculella populations, their efficacy is frequently limited, raising environmental concerns. Host plant volatiles are important allelochemicals that can be exploited for the management of pests. In our previous studies, we identified five volatile organic compounds (3-ethylacetophenone, 4-ethylacetophenone, geranylacetone, ethylbenzene, and 4-hydroxy-4-methyl-2-pentanone) as allelochemicals potentially influencing the oviposition behavior of P. operculella . Using electroantennography (EAG) and behavioral assays, we found that 4-ethylacetophenone significantly repelled P. operculella at all tested concentrations (1 μg, 10 μg, and 100 μg; p < 0.05), while 3-ethylacetophenone showed no significant effects ( p > 0.05). Finally, the effect of 4-ethylacetophenone on preventing P. operculella from laying eggs was determined by an oviposition selection experiment. Our findings indicate that 4-ethylacetophenone derived from potato plants not only repels P. operculella and prevents egg-laying but also has the potential to reduce the number of eggs, making it a promising green alternative for controlling this pest.
研究领域:
农业昆虫学
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植物保护
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Fangfang Chen,Jiaming Wang,Wei Xu,Zhuangzhuang Ren,Guan Peng,Tao Huang,Fei Zhao
In this work, europium (III) complexes were synthesized by using different o-hydroxy-benzophenone ligands, namely 2-hydroxy-4-octyloxybenzophenone (HL 1 ), 4-allyloxy-2-hydroxybenzophenone (HL 2 ) and 2-hydroxy-4-methoxybenzophenone (HL 3 ). The structures and optical properties of the Eu III complexes E1, E2 and E3 were characterized by elemental analysis, infrared/fluorescence spectroscopy and mass spectrometry. The aggregation-induced emission properties from E1, E2 and E3 were systematically investigated in the acetone/water binary mixtures. At the same time, the corresponding agglomeration behavior and self-assembly structures in the Eu III complex system was confirmed through scanning electron microscopy. Excellent luminescent performance was illustrated in sample of E1 (the luminescence quantum yield of 21.36 % in solid state) which should be attributed to the aggregation-induced emission from better self-assembly behavior with longer carbon chain in ligand. The results of ultraviolet aging resistance from E1 reveal that the self-assembly behavior could not only improve the aggregation-induced emission performance, but also enhance the photostability of Eu III complex compared with the traditional β-diketone Eu III complex. This discovery may provide a facile strategy to design and prepare more promising rare earth complexes with good luminescence properties and strong photostability for application in solid state.
研究领域:
材料科学
·
化学
·
光学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2017
·
IF 4.339
Miaomiao Liu,Weiqiang Tang,Yisheng Xu,Hongbo Yu,Hongfeng Yin,Shuangliang Zhao,Shenghu Zhou
Pd-SnO 2 heteroaggregate nanocatalysts were synthesized by in-situ transformation of PdSn bimetallic nanoparticles on alumina. The PdSn bimetallic nanoparticles were prepared by co-reduction of Pd and Sn precursors. The obtained PdSn nanoparticles possibly have a core-shell like structure with Pd cores and Sn-rich shells due to the fast reduction of Pd precursors. The Pd-SnO 2 /Al 2 O 3 heteroaggreagte nanocatalysts were synthesized by calcination of PdSn/Al 2 O 3 in air followed by H 2 reduction. Various characterization techniques, such as HRTEM, XRD and XPS, were used to characterize the PdSn and Pd-SnO 2 . The Pd 3 -(SnO 2 ) 1 /Al 2 O 3 heteroaggreagte nanocatalysts with a ratio of Pd/Sn of 3/1 illustrated enhanced catalytic performances for p -nitroacetophenone and p -nitrobenzaldehyde hydrogenations relative to monometallic Pd nanocatalysts. Theoretical calculations using density functional theory suggested that Pd-SnO 2 facilitates the adsorption of reactants in a higher degree than that of products, thus enhancing the catalytic activity even with partial coverage of Pd surfaces with SnO 2 . The blockage effect of SnO 2 on Pd surfaces is speculated to enhance the catalytic selectivity for p -nitroacetophenone and p -nitrobenzaldehyde hydrogenations over Pd-SnO 2 heteroaggregate nanocatalysts.
研究领域:
催化化学
·
材料科学
·
理论计算
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DOI
高影响因子
Current Analytical Chemistry
·
2015
·Vol. 11
·期 3
·211-216
·
IF 1.132
Xiaojing Si,Ting Wang,Yaping Ding,Bingdi Liu,Liqiang Luo
In this study, multi-walled carbon nanotubes (MWCNTs) and vitamin B12 (VB12) were fabricated on the surface of glassy carbon electrode (GCE). This modified electrode (MWCNTs/VB12/GCE) was designed to determine p-hydroxyacetophenone (p-HYD) by square wave voltammetry. The MWCNTs/VB12 film was characterized by Electrochemical impedance spectroscopy and Fourier transform infrared spectroscopy, which exhibited excellent electrocatalytic activity toward p-HYD by using square wave voltammetry. The peak current was linear with the concentration of p-HYD over the range of 0.5 - 250 µM with the detection limit of 0. 15 µM (S/N = 3). Furthermore, this proposed sensor has also demonstrated good reproducibility, high stability and excellent anti-interference ability.
研究领域:
分析化学
·
电化学
·
生物传感器
·
药物分析
·
纳米材料
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DOI
高影响因子
Phytochemistry Letters
·
2023
·
IF 1.7
Lin Jia,Cui-Ping Zhang,Yi Zhu,Chun-Yan Zhao,Zeng-Hui Han,Dong-Bao Hu,Wei Shi
In an endeavor to pinpoint the structural constituents vital for the biological activity of 2,4-dihydroxy-5-methylphenyl ethanone, a series of its ether derivatives was synthesized and examined for their antifungal activities against five notable phytopathogenic fungi. The bioassay revealed that compounds 2 , 3a , 3g , 3j and 3k manifested a broad spectrum of antifungal efficacy. Notably, compound 3g was identified as especially potent, with IC 50 values ranging from 16.52 to 37.52 μ g/mL, outperforming the standard thiabendazole. The data underscore compound 3g as a prospective candidate for the development of an innovative antifungal agent. A comprehensive structure-activity relationship (SAR) study of the acetophenones was also conducted.
研究领域:
植物病理学
·
药物化学
·
真菌学
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2024
·
IF 2.1
Yingao Yang,Zhengzai Cheng,Lesly Dasilva Wandji Djouonkep,Mario Gauthier
A novel diphenyl monomer, dimethyl 2,2'-(((ethane-1,2-diylbis(oxy))bis(4-acetyl-3,1-phenylene))bis(oxy))diacetate (EDPD), was synthesized from methyl 2-(4-acetyl-3-hydroxyphenoxy)acetate (MAHA), a 2,4-dihydroxyacetophenonederivative, and combined with 1,4-butanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol or p-phenylenedimethanolto afford a series of biodegradable polyesters via melt polymerization. The polyesters were characterized by Fourier transform infrared and proton nuclear magnetic resonance spectroscopy, gel permeation chromatography, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The weight-average molecular weight (Mw) of the polyesters varied from 3.2–4.4 × 104 g/mol, the glass transition temperature (Tg) from 52 to 80 °C, and the 5% decomposition temperature (Td,5%) was in the 334–362 °C range. All the samples exhibited high yield strength (53–68 MPa) and elongation at break (230–330%) values, comparable with poly(ethylene terephthalate) (PET), owing to their aromatic character. Degradability testing of the polyesters in soil yielded mass losses reaching up to 7% after 32 weeks. In ecotoxicity testing, earthworms had a survival rate of more than 80% after 14 d of incubation, indicating relatively low toxicity. Overall, the good thermal and mechanical properties, biodegradability and low ecotoxicity of the polyesters make them promising materials for packaging applications, in replacement for PET, thereby promoting carbon neutrality and sustainable development.
研究领域:
高分子科学
·
材料工程
·
环境科学
·
生物降解材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）