International Journal of Chemical Engineering
·
2020
·
IF 1.877
Fuxin Yang,Peng Feng
Ionic liquid (IL) usually possesses high viscosity. In this work, the selected organic solvents, namely, dimethyl sulfoxide, N,N-dimethylacetamide, and N,N-dimethylformamide, were used as the diluents to lower IL viscosity. The thermophysical properties of the densities and viscosities for the binary mixtures of IL (i.e., 1-octyl-3-methylimidazolium acetate) with solvents were studied at normal pressure in the temperature ranges of 303.15 K to 348.15 K. The effects of the organic solvents on lowering IL viscosity were quantitatively evaluated. The excess properties of the mixtures were calculated to analyze the interactions between IL and solvents. The hard-sphere model was employed to reproduce the viscosity behavior of the pure substances and binary mixtures.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Xiaotao Liu,Shanshan Xing,Yuanteng Xu,Ruiqing Chen,Chang Lin,Liangqia Guo
Graphitic carbon nitride (g-C 3 N 4 ) has been shown as a promising visible-light photosensitizer for photodynamic therapy (PDT) application. Nevertheless, its therapeutic efficiency is limited by the low efficiency of visible-light utilization. To overcome this issue, 3-amino-1,2,4-triazole-derived graphitic carbon nitride nanosheets (g-C 3 N 5 NSs) are prepared for PDT application. The addition of nitrogen-rich triazole group into the g-C 3 N 4 motif significantly makes the light absorption of g-C 3 N 5 NSs red-shift with the band gap down to 1.95 eV, corresponding to a absorption edge at a wavelength of 636 nm. g-C 3 N 5 NSs generate superoxide anion radicals (O 2 •– ) and singlet oxygen ( 1 O 2 ) under the irradiation of a low-intensity white light emitting diode. Owing to the high efficiency of visible-light utilization, g-C 3 N 5 NSs show about 9.5 fold photocatalytic activity of g-C 3 N 4 NSs. In vitro anticancer studies based on the results of CCK-8 assay, Calcein-AM/PI cell-survival assay and photo-induced intracellular ROS level analysis in living HeLa cells demonstrate the potential of g-C 3 N 5 NSs as a low-toxic and biocompatible high-efficient photosensitizer for PDT.
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JOURNAL OF CHEMICAL RESEARCH
·
2020
·
IF 0.593
Mingguang Zhang,Zhongbao Bi,Yunyun Wang,Yuxun Zhao,Yang Yang,Yongqiang Zhu,Shifa Wang
A new and practical synthesis of 3-chloro-2,4-difluoro-5-hydroxybenzoic acid, a key intermediate for preparing antimicrobial 3-quinolinecarboxylic acid drugs, is synthesized from 2,4-difluoro-3-chlororobenzoic acid. The protocol involves nitration, esterification, reduction of NO2, diazotization, and hydrolysis with a 70% overall yield. The structures of the synthesized compounds are determined by infrared spectroscopy, nuclear magnetic resonance spectroscopy, and high-resolution electrospray ionization mass spectrometry. The advantages of this developed synthetic strategy include an improved overall yield and readily controllable reaction conditions.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 3
·2360-2369
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IF 2.22
Yu Bin,Jia Dongling,Miao Yuqing
Herein, the Nd(OH) 3 -NiTe 2 nanoparticles were synthesized by hydrothermal synthesis. The crystal structure, morphology and surface element composition were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. At the same time, the electrocatalytic performance of Nd(OH) 3 -NiTe 2 for glucose oxidation in alkaline electrolyte was determined by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy (EIS). It exhibits a high peak current density of about 21.09 mA/cm 2 for glucose oxidation. The low semicircle diameter of 8000 Ω means fast electron transfer of Nd(OH) 3 -NiTe 2 . The oxidation signal of glucose at 0.5 V tends to be constant within 36000 s. Electrochemical experiments show that Nd(OH) 3 -NiTe 2 nanoparticles exhibit good electrocatalytic activity and stability for the oxidation of glucose, which proves their potential application in the field of fuel cells.
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JOURNAL OF APPLIED MICROBIOLOGY
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2022
·Vol. 133
·期 5
·3161-3175
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IF 4.059
Pan Deng,Wang Xing‐Yun,Zhou Jin‐Wei,Yang Liang,Khan Abbas,Wei Dong‐Qing,Li Jun‐Jian,Jia Ai‐Qun
AimsIn the current study the anti‐virulence and anti‐biofilm activities of the cinnamic acid derivative, 3‐methoxycinnamic acid, was investigated against Agrobacterium tumefaciens.Methods and ResultsBased on the disc diffusion test and β‐galactosidase activity assay, 3‐methoxycinnamic acid was shown to interfere with the quorum sensing (QS) system of A. tumefaciens. Crystal violet staining assay, phenol‐sulfuric acid method, Bradford protein assay and confocal laser scanning microscopy (CLSM) revealed that the biofilm formation of A. tumefaciens was inhibited after the treatment of 3‐methoxycinnamic acid. Employing high‐performance liquid chromatography (HPLC) analysis of culture supernatant revealed that the production of 3‐oxo‐octanoylhomoserine lactone (3‐oxo‐C8‐HSL) decreased concentration‐dependently after treatment with 3‐methoxycinnamic acid. Swimming and chemotaxis assays also indicated that 3‐methoxycinnamic acid had a good effect on reducing the motility and chemotaxis of A. tumefaciens. In addition, the RT‐qPCR, molecular docking and simulations further demonstrated that 3‐methoxycinnamic acid could competitively inhibit the binding of 3‐oxo‐C8‐HSL to TraR and down‐regulate virulence‐related genes.Conclusions3‐Methoxycinnamic acid is proved to have good anti‐virulence and anti‐biofilm activities against A. tumefaciens.Significance and Impact of the StudyThis is the first study that investigates the anti‐virulence and anti‐biofilm activities of 3‐methoxycinnamic acid against A. tumefaciens. With its potential QS‐related virulence and biofilm inhibitory activities, 3‐methoxycinnamic acid is expected to be developed as a potent pesticide or adjuvant for the prevention and treatment of crown gall caused by A. tumefaciens.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
·
IF 2.857
Hai Zhang,Pengwei Jin,Min Zhang,Ling-Zhi Cheong,Peng Hu,Yue Zhao,Liangli Yu,Yong Wang,Yuanrong Jiang,Xuebing Xu
The present study investigated the possible mechanism of free radical scavengers on mitigation of 3-monochloro-1,2-propanediol (3-MCPD) fatty acid ester formation in vegetable oils. The electron spin resonance investigation showed that the concentration of free radicals could be clearly decreased in 1,2-distearoyl-sn-glycerol (DSG) samples by all four antioxidants (l-ascorbyl palmitate, α-tocopherol, lipophilic tea polyphenols, and rosemary extract) at 120 °C for 20 min under a N2 atmosphere. Moreover, the rosemary extract exhibited the highest inhibition efficiency. The Fourier transform infrared spectroscopy examination of DSG with α-tocopherol at 25 and 120 °C revealed that α-tocopherol could prevent the involvement of an ester carbonyl group of DSG in forming the cyclic acyloxonium free radical intermediate. Furthermore, the ultraperformance liquid chromatography–quadrupole–time-of-flight mass spectrometry analysis showed that α-tocopherol could suppress the formation of 3-MCPD di- and monoesters. Finally, the four antioxidants could decrease 3-MCPD esters in the palm oil during deodorization. Particularly, the rosemary extract also showed the highest efficiency in 3-MCPD ester mitigation.
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APPLIED CLAY SCIENCE
·
2019
·
IF 3.89
Hui-Ran Jin,Xin-Yu Zhou,Yong Zhu,Guo-Fan Sun,Shi-Jie Ding,Jing Chen
In this paper, non-aqueous Fe(OH) 3 /palygorskite dispersion was prepared and its liquid crystal phase behavior was investigated. Positively charged Fe(OH) 3 colloidal particles were put in to non-aqueous and organically modified palygorskite dispersion. The effects of organically treated palygorskite and Fe(OH) 3 on the preparation of stable palygorskite dispersion were characterized with FT-IR, XRD , Contact Angle measurement , Zeta potential detection, Settlement measurement and SEM , respectively. The addition of Fe(OH) 3 particles shifted the concentrations of the coexisting isotropic and nematic phases to higher values while at the same time markedly accelerated the phase separation. The influence of Fe(OH) 3 particles on the dispersion in magnetic field was also discussed.
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OPTICS EXPRESS
·
2018
·Vol. 26
·期 13
·17056-17065
·
IF 3.356
X. X. Zeng,R. Wang,X. Q. Xi,B. Li,J. Zhou
Terahertz (THz) radiation excites electronic and optical modes of many materials, and controlling interaction of these materials with THz pulses provides a fascinating avenue to achieve unprecedented functionalities in return. Here, woodpile-structured rare-earth orthoferrite metamaterials built with 3-D direct ink writing technology are proposed and experimentally demonstrated. Polarization-independent THz refraction and switching of resonances by varying the number of layers in the structure, as well as the structural parameters and specimen support angle are achieved. Such all-rare-earth-orthoferrite dielectric metamaterials are easy to fabricate and can be very promising in developing efficient and low cost THz functional metadevices.
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Journal of Environmental Sciences
·
2015
·
IF 2.002
Xiaolong Li,Congcong Ding,Jiali Liao,Liang Du,Qun Sun,Jijun Yang,Yuanyou Yang,Dong Zhang,Jun Tang,Ning Liu
The biosorption mechanisms of uranium on an aerobic bacterial strain Streptomyces sporoverrucosus dwc-3, isolated from a potential disposal site for (ultra-)low uraniferous radioactive waste in Southwest China, were evaluated by using transmission electron microscopy (TEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), proton induced X-ray emission (PIXE) and enhanced proton backscattering spectrometry (EPBS). Approximately 60% of total uranium at an initial concentration of 10 mg/L uranium nitrate solution could be absorbed on 100 mg S. sporoverrucosus dwc-3 with an adsorption capacity of more than 3.0 mg/g (wet weight) after 12 hr at room temperature at pH 3.0. The dynamic biosorption process of S. sporoverrucosus dwc-3 for uranyl ions was well described by a pseudo second-order model. S. sporoverrucosus dwc-3 could accumulate uranium on cell walls and within the cell, as revealed by SEM and TEM analysis as well as EDX spectra. XPS and FT-IR analysis further suggested that the absorbed uranium was bound to amino, phosphate and carboxyl groups of the cells. Additionally, PIXE and EPBS results confirmed that ion exchange also contributed to the adsorption process of uranium.
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JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 24
·10849-10862
·
IF 2.302
Zhang Man,Li Chuan,Gao Huiqi,Fu Wei,Li Yingying,Tang Liwei,Zhou Zhiming
Twelve salts of 3-nitro-1,2,4-triazol-5-one (NTO) (ammonium, hydrazinium, guanidinium, aminoguanidinium, diaminoguanidinium, triaminoguanidinium, N -carbamoylguanidinium, semicarbazidium, 1,5-diamino-1,2,4-tetrazolium, 3,4,5- triamino-1,2,4-triazolium, 3,6,7-triamino-7H-[1, 2, 4]triazolo[5,1-c][1,2,4]triazol-2- ium, and 4,4′,5,5′-tetraamino-3,3′-bi-1,2,4-triazolium) were synthesized. The new salts were fully characterized by 1 H and 13 C NMR spectroscopy, infrared spectroscopy, and elemental analysis. The crystal structures of salts 10 and 11 were determined by single-crystal X-ray diffraction. All energetic salts except salt 6 exhibit excellent thermal stabilities with decomposition temperatures ranging from 203 to 270 °C. The densities of salts ranged from 1.65 to 1.88 g cm −1 as measured by a gas pycnometer. Theoretical performance calculations (Gaussian 03 and EXPLO5 v6.01) yielded detonation pressures and detonation velocities for the energetic salts, ranging from 24.4 to 38.1 GPa and 8136 to 9575 m s −1 , respectively. In particular, salt 2 has an outstanding detonation performance ( P
cj = 38.1 GPa, v
D = 9575 m s −1 ) with a satisfactory acidity compared to that of NTO ( pK
a = 5.63 versus pK
a = 2.37). Furthermore, the particles of salt 2 form two-dimensional blades of submicron size, as determined by scanning electron microscopy analysis. Meanwhile, salt 2 was compatible with TNAZ, TATB, TKX-50, Al, NH 4 ClO 4 , CL-20, TNT, and F2603 fluororubber, as determined by differential scanning calorimetry or vacuum stability tests.
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ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2014
·
IF 1.251
Fengting Chen,Jiachang Zhao,Jingli Xu,Yuandong Wu
The hetero-bimetallic polyanionic compound BiCu 2 (TeO 3 )(SO 4 )(OH) 3 was synthesized using hydrothermal techniques. Single-crystal X-ray diffraction analysis revealed that title compound crystallizes in the monoclinic space group P 2 1 / n (No. 14) with lattice parameters a = 9.5513(15), b = 6.3022(10), c = 13.955(2) Å, β = 102.845(3)°, and Z = 4. The structure of title compound is a three-dimensional tunnel framework consisting of edge-sharing two-dimensional [Cu 3 O 10 ] 14– layers linked by BiO 8 bicapped trigonal prisms, TeO 3 2– trigonal pyramids and SO 4 2– tetrahedra. Along [010], each Cu(1)O 6 octahedron shares two edges with adjacent Cu(1)O 6 units to form infinite one-dimensional zigzag chains, which are connected by double inverted Cu(2)O 6 octahedral units via edge sharing (O9 ··· O8). The suitability of crystal for optical applications was investigated by UV/Vis/NIR spectroscopy. Raman and FTIR spectra were used to confirm the presence of various functional groups such as TeO 3 2– , SO 4 2– , OH – in the crystals.
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INSTRUMENTATION SCIENCE & TECHNOLOGY
·
2017
·
IF 0.874
Shuyan Niu,Yajie Fang,Kun Zhang,Juan Sun,Jun Wan
A facile and sensitive fluorescent strategy for the determination of dopamine is reported using 2, 3-diaminophenazine. Dopamine caused autooxidation in the presence of oxygen with catalysis by Mn2+ and formed 2, 3-dihydro-1H-indole-5,6-dione. 2, 3-Diaminophenazine provided relatively strong fluorescence. 2, 3-Diaminophenazine in aqueous solution caused fluorescence quenching when the aminochrome condensed with 2, 3-diaminophenazine to allow the determination of dopamine. Under the optimized conditions, the linear dynamic range for dopamine was from 2.0 × 10−6 mol · L−1 to 6.1 × 10−5 mol · L−1 with a detection limit of 1.76 × 10−6 mol · L−1.
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危险品化学品经营许可证（带存储）