MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Yang Liu,Xueping Dang,Hanyue Ding,Huaixia Chen
A molecularly imprinted polymer (MIP) monolith was in situ synthesized in pipette tip with 4,4′-methylenedianiline (4,4′-MDA) as template molecule and 4-vinylpyridine as functional monomer. The 4,4′-MDA-MIP monolith was used to extract three primary aromatic amines (PAAs), including 4,4′-MAD, 4-aminobiphenyl and 3,3′-dichlorobenzidine. The 4,4′-MDA-MIP monolith have specific recognition capacity and high adsorption capacity for the three PAAs. The imprinting factor for 4,4′-MAD was up to 4.26 and the adsorption capacity for 4-aminobiphenyl was up to 117.94 mg g −1 . The extraction parameters for the pipette tip solid-phase extraction (PTSPE) were optimized. A determination method for the three PAAs was established by coupling the PTSPE with high performance liquid chromatography-diode array detector. The detection linear range (LRs) was 0.70–500 µg kg −1 (R 2 > 0.998), and the limits of detection (LODs) was 0.23–1.00 µg kg −1 (S/N = 3). The method was used for the migration detection of the PAAs from four polypropylene spoons, which showed satisfactory recovery of 87.4–110.6 %, indicating that the 4,4′-MDA-MIP monolith had good enrichment ability for PAAs in a complex matrix.
研究领域:
分析化学
·
食品安全
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·Vol. 21
·期 3
·e202400043
·
IF 2.3
Yong Li,Zhongfu Luo,Wenjing Liu,Wenzhang Chen,Jianta Wang,Gaofeng Zhu,Bing Guo,Lei Tang,Lingling Fan
Four series of novel 1,3,4-oxadiazole/1,2,4-triazole hybrids of phthalide derivatives were designed and synthesized to search for novel potential antifungal agents. Preliminary antifungal activity assay results showed that compounds 4 a , 4 b , 4 m , 5 b , 5 f , 5 h , and 7 h exhibited moderate to excellent inhibitory activity against some phytopathogenic fungi. Among them, compound 5 b displayed the most outstanding antifungal effects against V. mali and S. sclerotiorum , with the EC 50 mean of 3.96 μg/mL and 5.60 μg/mL, respectively, which was superior to those of commercial fungicides hymexazol and chlorothalonil. Furthermore, compound 5 b could completely suppress the spore germination of V. mali at a concentration of 10 μg/mL. Finally, molecular docking revealed that the potential target for the antifungal activity of compound 5 b was succinate dehydrogenase (SDH). This research provides novel candidate compounds for the prevention of phytopathogenic fungi. Graphical
研究领域:
药物化学
·
植物病理学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Hanye Ju,Yankun Zhang,Yongqiang Qin,Jin Liu,Yihou Tang,Inna M. Sokolova,Xiaoping Diao
UV filters, such as 4-Methylbenzylidene camphor (4-MBC), are emerging environmental contaminants that threaten marine life and ecosystem integrity. This study investigated metabolic disruptions in the liver of clown anemonefish ( Amphiprion ocellaris ) after exposure to 4-MBC (0, 10, 50 µg/L) for 7 or 14 days. Exposure led to 4-MBC accumulation and significant liver metabolic disturbances and endocrine disruption in the fish. Random forest analysis identified vitellogenin and testosterone levels as key factors distinguishing treatment groups. Molecular docking showed high binding affinity of 4-MBC to 17β-hydroxysteroid dehydrogenase and vitellogenin in the liver. Additionally, 4-MBC exposure reduced thyroid hormone levels and disrupted glucose and lipid metabolism, with more severe effects at 7 days compared to 14 days. Transcriptome analysis revealed that 4-MBC interfered with hepatic insulin sensitivity by disrupting pathways involving Insulin Receptor (INSR), Phosphoinositide 3-Kinase (PI3K), Insulin Receptor Substrate (IRS), and others. It also impacted genes related to lipid accumulation, gluconeogenesis, and lipid utilization. Furthermore, 4-MBC disrupted the endoplasmic reticulum (ER)’s protein degradation system, causing ER stress and activating lipogenic pathways, which enhanced lipid accumulation. The reduction in thyroid hormones and metabolic dysfunctions may impair the reproductive health and population stability of clown anemonefish. These findings underscore the potential ecotoxicity of 4-MBC and its adverse effects on coral reef fish populations, raising concerns about its environmental impact.
研究领域:
生态毒理学
·
海洋生物学
·
内分泌学
·
分子生物学
·
环境科学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Rui Chen,Qiuyue Li,Kai Xu,Zhiwei Zhang,Tianhua Wang,Jinkang Ma,Yan Xi,Lifeng Cao,Bing Teng,Haitao Wu
In this present work, a chalcone derivative 1-(4-Chlorophenyl)-3-(4-ethoxyphenyl)-prop-2-en-1-one is investigated using the density functional theory. PES scan is used to find the most stable conformational structure of the title compound. The geometrical parameters, FT-IR and FT-Raman spectra are performed by the DFT method with B3LYP/6-311+G basis set, which are very comparable with the experimental results. UV-Vis spectrum, frontier molecular orbitals, global reactivity descriptors, molecular electrostatic potential surface, NLO parameters and Mulliken charge in the gas phase, various polar and non-polar solvents are performed to reveal solvents effect. Further, it is found that the electronic properties show a good correlation with the polarity of solvents. Hirshfeld Surface analysis demonstrates H···H contact is dominant in the crystal packing. By means of molecular reactivity descriptors such as natural bond orbital analysis, Fukui function and dual descriptor analysis, the chemical reactivity is theoretically estimated. ELF and LOL are used to access the energy density of electrons. Molecular docking illustrates ECC may be a potential inhibitor for 6R3K protein.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yichang Ma,Jianxian Zeng,Yajie Zeng,Hu Zhou,Guoqing Liu,Yuan Liu,Lingwei Zeng,Jian Jian,Zhengqiu Yuan
In order to separate palladium (II) from electroplating wastewaters, poly(4-vinylpyridine)-b-polysulfone-b-poly(4-vinylpyridine) (P4VP-PSF-P4VP) / polysulfone blend membranes were fabricated by combining non-solvent induced phase separation, surface segregation and self-assembly of block copolymer . Amphiphilic P4VP-PSF-P4VP was used as the membrane base material, which was synthesized by introducing the functional monomer of 4-vinylpyridine (4-VP), and polysulfone as the additive. Effects of blend ratio and 4-VP content on membrane performance, such as structure, hydrophilicity, pure water flux and adsorption capacity towards Pd (II), were investigated. The membranes exhibited dense surface structure and low roughness due to surface segregation and self-assembly of P4VP-PSF-P4VP. The presence of 4-VP increased hydrophilicity and water flux of membrane, and it also provided good adsorption capacity towards Pd (II) (up to 103.1 ± 5.15 mg/g). Further, the membrane was used to separate Pd (II) from simulated wastewaters during filtration. It showed good rejection ability and high selectivity towards Pd (II) in co-existence of Cu (II) and Ni (II), and selectivity coefficients of Pd/Cu and Pd/Ni are 41.9 ± 1.88 and 97.8 ± 4.32, respectively. In filtration process of actual electroplating wastewater, the membrane also exhibited excellent rejection performance (Pd (II) rejection reached up to 96.8 ± 2.71%). Perhaps it is suitable for future practice applications.
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PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2014
·Vol. 21
·期 5
·691-697
·
IF 1.316
Zhao Huayi,Shi Qian,Xiao Hongping,Li Xinhua
A metal–organic gels containing Ag(4,4′-bipyridine)NO 3 metal–organic framework and 4,4′-bipyridine units were hydrothermally synthesized using excess 4,4′-bipyridine ligand as building units. The metal–organic gels structure was characterized by various spectroscopic methods and a mechanism of assembly was discussed on the basis of the obtained data. The metal–organic gels retained the characteristics of both the metal–organic framework and gels; furthermore, the reversible hydration/dehydration, reversible anion exchange, and responsive properties were also investigated.
研究领域:
化学
·
材料科学
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高影响因子
HIGH PERFORMANCE POLYMERS
·
2020
·
IF 1.568
Dalin Dong,Yuezhen Bin,Xigao Jian
Meta-poly(phthalazinone ether ketone ketone) copolymers with 4,4′-dihydroxybiphenyls (meta-PPBEKK) was synthesized with 4,4′-dihydroxybiphenyls (BP), 1,3-bis(4-fluorobenzoyl)benzene (meta-DFKK) and 4-(4-hydroxyphenyl)-2,3-diazaphthalene-1-one (DHPZ). The copolymers are high-temperature resistant and have good solubility in many solvents. With increasing molar ratio of BP to meta-DFKK from 0 to 0.2, the addition of BP improves number-average molecular masses, intrinsic viscosity, mechanical properties and fluidity of meta-PPBEKKs. When the molar ratio of BP to meta-DFKK is 0.2, the intrinsic viscosity reaches 1.14 dL g−1, the number-average molecular mass reaches 44700 g mol−1, the maximum thermal elongation ratio reaches 14 with strength of 127.1 MPa and Young’s modulus of 2.4 GPa. With increasing molar ratio of BP to meta-DFKK from 0 to 0.2, meta-PPBEKKs have improved comprehensive properties, and make sense in many fields.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Fang-Min CHEN,Chi-Chi ZHOU,Xiong HE,Yan LI,Xiu-Qing ZHANG
ABSTRACT Two new 3-D Cd(II) coordination polymers with p -phthalic acid ( p -BDC) and 4,4΄-dipyridylamine (4,4΄-dpa), namely [Cd 2 ( p -BDC) 2 (4,4΄-dpa) 2 ] n 1 and {[Cd( p -BDC)(4,4΄-dpa) (H 2 O)]·4H 2 O} n 2 were successfully synthesized under hydrothermal conditions at 120 and 140 °C. They were characterized by single-crystal X-ray diffraction, IR, PXRD and TGA . It was further characterized by Hirshfeld surface (HS) analysis for complex 2 . The luminescent properties of the complexes have also been investigated.
研究领域:
化学
·
材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Yubin Zhao,Yoshinori Yamaguchi,Yi Ni,Mingda Li,Xiaoming Dou
Mercury ion (Hg 2+ ) is one of the most toxic heavy metal ions which will cause permanent damage to the brain and kidneys. So, it is important to develop a sensitive, simple and reliable approach to detect Hg 2+ . In this work, we report a surface-enhanced Raman scatting (SERS) sensor by decorating the inner wall of capillary with 4,4′-dipyridyl (Dpy) functionalized silver nanoparticles (AgNPs). The main advantage of this sensor is that it can collect samples directly by capillary force and carry out on-site analysis by combining portable Raman spectrometer. In the presence of Hg 2+ , the Dpy molecules would be separated from the surface of AgNPs and coordinated with Hg 2+ , resulting in a decrease in the SERS signal. A linear correlation of Raman intensity with Hg 2+ concentrations from 1 to 100 part-per-billion (ppb) was obtained for quantitative analysis and the limit of detection (LOD) was determined to be 0.1 ppb. The good reproducibility and selectivity of the sensor were also demonstrated. In addition, the sensors were successfully applied to detect Hg 2+ in real environmental water samples, and the sampling process provided operation convenience compared to conventional methods. These results indicated that these capillary sensors had great potential for Hg 2+ detection in practical use.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ting Pan,Baohua Yue,Liuming Yan,Guangbo Zeng,Yidong Hu,Shufa He,Wei Lu,Hongbin Zhao,Jiujun Zhang
Novel functionalized polysulfone with high local density of sulfonic acid groups, N , N -bis(sulfopropyl)aminyl-4-phenyl polysulfone or O , O′ -bis(sulfopropyl)resorcinol-5-yl-4-phenyl polysulfone (PSF-X-C 3 H 6 SO 3 H, X = N or O) are synthesized. These polymers are synthesized by bromination of polysulfone followed by Suzuki cross-coupling reaction to graft the aminophenyl groups and the dimethoxyphenyl groups onto the polymeric backbone, followed by introduction of the sulfopropyl groups via sultone ring-opening reaction. In addition, the composite membrane of PSF-O-C 3 H 6 SO 3 H and PSF-N-C 3 H 6 SO 3 H is also synthesized for comparison. The maximum proton conductivity of composite PSF-O-C 3 H 6 SO 3 H and PSF-N-C 3 H 6 SO 3 H reaches 46.66 mS cm −1 at 95 °C and 90% RH, higher than PSF-O-C 3 H 6 SO 3 H (42.06 mS cm −1 ) and PSF-N-C 3 H 6 SO 3 H (38.76 mS cm −1 ). Meanwhile, the composite exhibits compromised water uptake and swelling ratio, and low methanol permeability . The excellent overall performance of the composite is attributed to phase-separation between the hydrophilic and the hydrophobic subphases, and the hydrogen-bonding network developed in the hydrophilic subphases.
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高影响因子
MONATSHEFTE FUR CHEMIE
·
2015
·Vol. 146
·期 8
·1343-1347
·
IF 1.222
Qiu Dezhi,Wang Yanyan,Lu Dongming,Zhou Lihong,Zeng Qingle
Abstract We have developed a KOH-promoted transition-metal-free synthesis of 2-substituted 4(3 H )-quinazolinones from anthranilamides and benzyl alcohols or cinnamyl alcohol with air as oxidant. The protocol is simple, practical, and cost saving. Graphical abstract
研究领域:
有机化学
·
药物化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xu Zhang,Hui Wang,Xiangyu Wang,Ning Wang,Xuehua Wu
The liquid organic hydrogen carriers (LOHCs) system has attracted much attention because of its promising characteristics. In this paper, 4-methylindole (4-MID), was selected and studied in hydrogenation and dehydrogenation processes as a potential liquid organic hydrogen carrier (LOHC) because of its theoretical hydrogen storage density of 5.76 wt%, a melting point of 5 °C and a boiling point of 267 °C. Full hydrogenation of 4-MID was carried out over a 5 wt% Ru/Al 2 O 3 catalyst in the range of 160–200 °C at 7 MPa. The results showed that the hydrogenation reaction rate was positively correlated with the temperature, and the apparent activation energy was 67.3 kJ/mol. The structure of the hydrogenation intermediates was calculated to determine a reasonable reaction pathway by means of Material Studio calculations. The full hydrogenation product, was dehydrogenated over a 5 wt% Pd/Al 2 O 3 catalyst in the range of 150–180 °C at 101 kPa. The fully dehydrogenation was accomplished at 150 °C for 70 min. The cycling performance of 4-MID was investigated and it was found that after three cycles, its hydrogenation and dehydrogenation performance was good.
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高影响因子
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