IONICS
·
2016
·Vol. 22
·期 10
·1947-1955
·
IF 2.119
Zhuo Kelei,Ma Xueli,Chen Yujuan,Wang Congyue,Li Aoqi,Yan Changling
The molecular imprinting technique is powerful to prepare functional materials with molecular recognition properties. In this work, a potentiometric sensor was fabricated by dispersing molecularly imprinted polymers (MIPs) into plasticized PVC matrix and used for the determination of 1-hexyl-3-methylimidazolium cation ([C 6 mim] + ) in aqueous solution. The MIPs were synthesized by precipitation polymerization using 1-hexyl-3-methylimidazolium chloride ([C 6 mim]Cl) as the template molecule, methacrylic acid (MAA) and ethylene glycol dimethacrylat (EGDMA) as the functional monomers, and EGDMA also as the cross-linking agent. The as-prepared electrode exhibited a Nernstian response (58.87 ± 0.3 mV per decade) to [C 6 mim] + in a concentration range from 1.0 × 10 −6 to 0.1 mol kg −1 with a low detection limit of 2.8 × 10 −7 mol kg −1 , high selectivity, and little pH influence. The as-prepared electrode was used for the detection of the [C 6 mim] + in distilled water, tap water, and river water with a good recovery. It was also successfully applied in the determination of mean activity coefficients of [C 6 mim]Br in fructose + water systems based on the potentiometric method at 298.15 K.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-12
·
IF 5.3
Han Hong,Ji Yuhan,Zhao Xin,Yin Ling,Liu Xiangyi,Sha Jingquan
A colorimetric sensing method for salicylic acid (SA) was developed by designing and fabricating bimetallic oxide nanozymes. Firstly, by calcinating MIL-100(Fe)@PMo 12 (MOFs@POMs) at different temperature, Fe 2 (MoO 4 ) 3 -Ts (T = 400℃, 500℃, 600℃, 700℃) nanoparticles (NPs) were successfully prepared. Secondly, by evaluating the peroxidase-like activities, Fe 2 (MoO 4 ) 3 –600 NPs shows the best peroxidase-like activity attributed to the Fenton-like effect and the synergistic coupling interaction between Mo and Fe. Finally, based on the specific complexation between SA and Fe 3+ , a sensitive colorimetric sensor for SA was established, which exhibits superior selectivity and interference with a detection limit of 0.11 μM and a linear range of 10 to 100 μM, the lowest LOD for SA to date, to the best of our knowledge. Graphical abstract
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Food Chemistry-X
·
2026
·
IF 9.2
Zeqing Huang,Shuai Xu,Yonglin Li,Keqiang Huang,Chongyang Liu,Yuan Gao,Qi Li,Xiuzhu Yu
Germination enriched lignans and sterols but lowered the oil ALA proportion. • A 13-week flaxseed oil dietary intervention with flaxseed oil was conducted in mice. • Most tissue n-3 fatty acid measures showed no significant GFO-UGFO differences. Germination can enrich bioactive components in flaxseed oil, but its effects on tissue lipid profiles remain unclear. This study examined changes in oil composition and tissue lipid responses to germinated flaxseed oil (GFO). Mice received soybean oil, ungerminated flaxseed oil (UGFO), or GFO for 13 weeks. Adipose tissue and red blood cell fatty acid profiles and brain lipidomics were assessed. GFO contained 1.3 times the sterol content and 3.4 times the lignan content of UGFO, but its alpha-linolenic acid (C18:3n-3, ALA) proportion was lower (53.35% versus 57.17%). Most measured tissue n-3 fatty acid outcomes showed no significant differences between GFO and UGFO. Brain lipidomics revealed differences in several EPA- and DHA-containing species relative to soybean oil controls. Our findings characterize the tissue lipid responses to UGFO and GFO, and provides a basis for optimizing germination through a balance between ALA retention and minor component enrichment.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Run Ye,Bin-Wen Liu,Xiao-Ming Jiang,Jian Lu,Hui-Yi Zeng,Guo-Cong Guo
Exploration of a new nonlinear optical (NLO)-active functional motif is important in the rational design of promising infrared (IR) NLO materials. Compared with typical tetrahedral MQ4 (M = IIB, III, IV metals; Q = S, Se) motifs, MQ3 (M = As, Sb) pyramids favor high second-harmonic generation (SHG) efficiency while frequently hindering phase matching (PM) because of excessively large optical anisotropy. The surfactant–thermal method was first adopted to achieve PM in MQ3-containing systems and synthesize mixed covalent–ionic IR NLO materials. Two new thioarsenates of AMnAs3S6 (A = Cs, Rb) exhibiting strong PM SHG efficiencies comparable to commercial AGS and laser-induced damage thresholds of one order higher than AGS were obtained. The [As3S6]3– unit in their structures is an unprecedented NLO-active functional motif, which can be useful in designing new IR NLO compounds with large SHG efficiency. In addition, the surfactant–thermal method provides a new general strategy for synthesizing new IR NLO materials.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yue Jiang,Zhiwei Hu,Qiaohong Yan,Xiaohong Zhu
All-solid-state lithium batteries have great potential applying to the fields of transportation and portable devices because of their high safety and energy density as the power source. As a critical component of device, solid-state electrolyte has been paid much attention. Given the excellent physical and chemical stability, Li 1+ x Al x Ti 2- x (PO 4 ) 3 (LATP)-based electrolyte has been considered as one of the most promising electrolytes for the next generation batteries. However, a further promotion of its ionic conductivity becomes extremely difficult, originating mainly from the poor connection of grains and a low relative density of LATP. Here, the nanosized and homogenous LATP ( x = 0.3) powders were synthesized through reducing the agglomeration of precursor powders and preparing at low temperatures. It is revealed that uniformly superfine LATP powders are able to improve the microstructure of grain boundaries during the pellet sintering process, thereby reducing the grain boundary resistance. Furthermore, as-synthesized nanosized powders mixed with Bi 2 O 3 additive present a better enhancement on the connection of grains and the relative density in LATP. On the basis of this understanding, we prepared LATP electrolytes with 0.5 wt% Bi 2 O 3 exhibiting a high ionic conductivity of 8.56 × 10 −4 S/cm, a high relative density of 94.4 % and a low activation energy of 0.27 eV, which is demonstrated as a prospective electrolyte in all-solid-state lithium battery LiFePO 4 /PEO/LATP/PEO/Li.
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JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Wei-Wei Zhang,Qiang Sha
An efficient B(C6F5)3-catalyzed multicomponent reaction of 2,3-diketoesters, amines, allenes, and nucleophiles was reported, which afforded 2α-functionalized pyrroles in moderate to good yields. The reaction features low catalyst loading, usage of a small amount of solvent, high atom economy, tunable installation of diverse functional groups at 2α-position, and water being formed as the byproduct. This is the first multicomponent reaction that combines vicinal tricarbonyl compounds with allenes.
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JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Changzhi Sun,Xiao Huang,Jun Jin,Yang Lu,Qing Wang,Jianhua Yang,Zhaoyin Wen
Lithium (Li) metal plays an indispensable role in Li-S batteries , but its fast degradation seriously impedes the practical application of Li-S batteries. Here, an ion-conductive LAGP-based composite protective layer (CPL) consisting of lithium aluminum germanium phosphate (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ) and polyvinylidene fluoride (PVDF) is prepared on Li metal anode via a facile casting method. In the presence of LAGP, the negative effect of CPL on the diffusion of Li + is minimized. Hence, it can not only effectively resist corrosive action of lithium polysulfides (LiPSs) on Li metal anode, but also reduce interfacial polarization and restrain dendritic Li growth. The protected Li anode exhibits exceptional cycling stability and low voltage polarization (∼30 mV at 0.5 mA cm −2 ) for 300 h. The electrochemical performance of Li-S batteries with protected Li anode is also greatly enhanced. The discharge specific capacity of 832.1 mAh g −1 and an average coulombic efficiency of 92% are obtained for up to 100 cycles at 0.5 C in LiNO 3 -free electrolyte. Additionally, the rate capability of Li-S batteries is significantly improved, delivering a reversible capacity of 565 mAh g −1 at 4 C. Our results also indicate this protection strategy can be extended to the Li-S pouch cells.
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TALANTA
·
2017
·
IF 4.162
Qianqian Wu,Kangnan Wang,Zian Wang,Yatong Sun,Duxia Cao,Zhiqiang Liu,Ruifang Guan,Songfang Zhao,Xueying Yu
Two 3-hydroxyflavone derivatives as one- and two-photon fluorescent chemosensors for cysteine (Cys) and homocysteine (Hcy) were synthesized. The recognition properties and mechanism of the chemosensors for Cys and Hcy were investigated systematically. The experiment results indicate that 3-hydroxyflavone compound 1 (6-bromo-2-(9-ethyl-9 H -carbazol-3-yl)-3-hydroxy-chromen-4-one) after the addition of nickel ions exhibits good recognition properties for Cys and Hcy with fluorescence enhancement and 65 nm absorption peak blue shift based on nickel displacement reaction mechanism. The detection limits (DL) with fluorescence as detected signal are 4.06 × 10 −3 µM (Cys, linear range of 10–80 µM) and 5.8 × 10 −3 µM (Hcy, linear range of 10–100 µM), respectively. But acrylate substituted 3-hydroxyflavone compound 2 (4-oxo-2-(4-diethylamino-phenyl)-4 H -chromen-3-yl acrylate) can specially identify Cys with fluorescence turn-on (DL = 1.87 × 10 −3 µM, linear range of 4–22 µM) based on Cys leading to acrylate hydrolysis mechanism and succedent excited-state intramolecular proton transfer process of 3-hydroxyflavone compound. Then Cys and Hcy biological thiols can be recognized at one time by these two 3-hydroxyflavone derivatives. The bioimaging experiment indicates that both the compounds can be successfully applied to the detection of Cys/Hcy in living cells and compound 2 also can be applied to bioimaging Cys in zebrafish by one- and two-photon fluorescence mode. Then these two compounds have a potential in the application of biological sample analysis.
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ACS Synthetic Biology
·
2024
·
IF 3.7
Xiao Ning,Fei Li,Xinlei Wei,Zhiguang Zhu,Chun You
3-Hydroxypropionic acid (3-HP) is a highly sought-after platform chemical serving as a precursor to a variety of high value-added chemical products. In this study, we designed and constructed a novel light-powered in vitro synthetic enzymatic biosystem comprising acetyl-CoA ligase, acetyl-CoA carboxylase, malonyl-CoA reductase, and phosphotransferase to efficiently produce 3-HP through CO2 fixation from acetate, a cost-effective and readily available substrate. The system employed natural thylakoid membranes (TMs) for the regeneration of adenosine triphosphate and nicotinamide adenine dinucleotide phosphate. Comprehensive investigations were conducted on the effects of buffer solutions, substrate concentrations, enzyme loading levels, and TMs loading levels to optimize the yield of 3-HP. Following optimization, a production of 0.46 mM 3-HP was achieved within 6 h from an initial 0.5 mM acetate, with a yield nearing 92%. This work underscores the simplicity of 3-HP production via an in vitro biomanufacturing platform and highlights the potential for incorporating TMs as a sustainable and environmentally friendly approach in biomanufacturing processes.
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PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Yuguo Zheng,Mei Chen,Renfeng Zhang,Wei Xue
BACKGROUND Plant pathogens cause substantial crop losses annually, posing a grave threat to global food security. Fungicides have usually been used for their control, but the rapid development of pesticide resistance renders many ineffective, therefore the search for novel and efficient green pesticides to prevent and control plant diseases has become the top priority in crop planting. RESULTS The results of bioassay studies indicated that most of the target compounds showed certain antimicrobial activity in vitro . In particular, compound X7 showed high inhibitory activity against Xanthomonas oryzae pv. oryzae ( Xoo ), with an EC 50 value of 27.47 μg mL −1 , surpassing conventional control agents such as thiazole zinc (41.55 μg mL −1 ) and thiodiazole copper (53.39 μg mL −1 ). Further studies on molecular docking showed that X7 had a strong binding affinity with 2FBW. The morphological change observed by scanning electron microscopy indicated that the surface of Xoo appears wrinkled and cracked under X7 treatment and a total of 2662 proteins were identified by label-free proteomic analysis. Three experiments have elucidated the mechanism whereby X7 induced considerable changes in the physiological and biochemical properties of Xoo , which in turn affected the reproduction and growth of bacteria. CONCLUSION This work represents a pivotal advancement, offering important reference for the research and development therapeutics in combating plant pathogens. © 2024 Society of Chemical Industry.
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JOURNAL OF SOLUTION CHEMISTRY
·
2019
·Vol. 48
·期 2
·125-141
·
IF 1.039
Wei Ying,Zhang Wenbo,Zhang Xinyuan,Yang Huige,Zhang Qingguo
In the present work, a new binary mixture system composed of the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([Emim][CF 3 SO 3 ]) and propylene carbonate (PC) was prepared. The densities, dynamic viscosities, and electrical conductivities of ([Emim][CF 3 SO 3 ] + PC) were measured over the whole concentration range (mole fractions of IL from 0 to 1) for temperatures from 288.15 to 353.15 K. The excess molar volumes ( V E ) and viscosity deviations (Δ η ) of the binary systems were calculated to characterize the volume contraction and intermolecular interactions in the mixture system, and both were correlated with the Redlich–Kister polynomial equation. The Vogel–Fulcher–Tamman equation was used to describe the temperature dependences of the dynamic viscosities and the electrical conductivities of the binary system. Further, density functional theory calculations were employed to obtain the structure, energy, and COSMO charge distributions of the cation and anion of the IL and the PC molecule, and the intermolecular interactions in the binary mixture system were evaluated.
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MACROMOLECULAR RESEARCH
·
2019
·Vol. 28
·期 1
·74-81
·
IF 1.758
Wang Yuting,You Sijia,Hu Jie,Zhang Kan
Two 3-methytetrahydrophtalimide-functional benzoxazine monomers containing nitrile group have been prepared in order to achieve the basic design rules for developing high-performance thermosets via multifunctional benzoxazines. The chemical structures of the two new synthesized benzoxazine monomers have been confirmed by 1 H NMR, 13 C NMR and FT-IR. Besides, the polymerization behavior has been studied by using DSC and in situ FT-IR. In addition, the thermal stability and flame retardant properties of the resulting polybenzoxazines have also been investigated using TGA and MCC. The polybenzoxazine based on ortho -3-methytetrahydrophtalimide functional benzoxazine containing ortho -nitrile group exhibits excellent thermal stability and low flammability, with a T d 10 of 378 °C and a HRC value of 180 J/(g K).
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