Frontiers in Chemistry
·
2023
·
IF 5.5
Sun Lixia,Hu Jiayan,Bai Weiqi,Mao Wutao,Song Zhongcheng
The hunt for a higher power storage, relatively inexpensive, non-polluting battery technology is currently a pressing issue because of the rapid growth of the worldwide economic and the progressively significant environmental pollution. Among the possible nanomaterials for rechargeable batteries that can have heteroatoms applied to it in order to improve its electrochemical behavior is LixTiy(PO4)3. Carbon-coated Mn-doped Li2Mn0.1Ti1.9(PO4)3 materials was synthesized by spray drying method. The material was characterized by XRD, SEM, TEM, BET, TGA et al. Crystal data refinement results by Rietveld method showed that the symmetry space group is Pbcn.The lattice parameters of Li2Mn0.1Ti1.9(PO4)3 are a = 11.9372 Å, b = 8.5409 Å, c = 8.5979 Å, α = β = γ = 90°, V = 876.59 Å3 and Z = 4). Rietveld refinement was performed, and the confidence factors are Rwp = 11.79%, Rp = 9.14%, and χ2 = 1.425. It was exhibited that LMTP0.1/CA-700 material has good crystallinity. Testing the cells with LAND test procedure (200 mA/g current density for 200 cycles), the LMTP0.1/CA-700 material has a discharge specific capacity of about 65 mAh/g. The capacity decayed by only 3% during the cycle. It has some potential application values as cathode of lithium ion battery in the future.
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Phytochemistry Letters
·
2014
·
IF 1.542
Guoyong Luo,Min Zhou,Yan Liu,Qi Ye,Jian Gu,Tianfang Huang,Guolin Zhang,Yinggang Luo
Two new 3-formyl-2-arylbenzofurans, iteafuranals A and B, were isolated from the 95% EtOH extract of the aerial parts of Itea ilicifolia . Their structures were elucidated as ( E )-2-(3,4-dihydroxyphenyl)-3-formyl-4-hydroxy-5-(prop-1-en-1-yl)benzofuran ( 1 , iteafuranal A) and ( E )-2-(3-hydroxy-4-methoxyphenyl)-3-formyl-4-hydroxy-5-(prop-1-en-1-yl)benzofuran ( 2 , iteafuranal B) by comprehensive analyses of spectroscopic data including 1- and 2-D NMR, UV, IR, and HRMS data. The structure of 1 was confirmed by X-ray crystallography analysis. Compound 1 showed DPPH free radical scavenging capacity with an IC 50 value of 0.34 mg/mL. Compounds 1 and 2 showed ABTS cation radical scavenging capacity with IC 50 values of 0.23 and 0.30 mg/mL, respectively.
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LIQUID CRYSTALS
·
2012
·
IF 1.858
Pei Chen,Yan Li,Xinbing Chen,Zhongwei An
A series of coumarin derivatives, 7-alkoxycoumarin-3-carbonyl hydrazine (nCCH), which possessed a hydrazine moiety at the end of the molecule was prepared and was characterised by infrared and 1H-nuclear magnetic resonance spectra, electrospray ionisation-mass spectrometry and elemental analysis. All the compounds exhibited enantiotropic mesophases with temperature domains of 67–82°C and 46–82°C on heating and cooling processes, as well as favourable gelability to kinds of organic solvents. The effect of the length of the alkoxy chain on mesomorphic and gelation properties was discussed. The studies revealed that hydrogen bonding between the nCCH molecules was one of the main driving forces for the formation of the gel and thermotropic mesophases.
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NANOTECHNOLOGY
·
2020
·Vol. 31
·期 37
·374003
·
IF 3.551
Xitong Liang,Dongfeng Xue
Novel electrode materials with desired specific capacitances are needed for supercapacitors. Rare-earth (RE)-based materials are fascinating in the field of catalysis and energy. Herein, a series of hydroxides including La, Ce, Pr and Nd was synthesized via in situ precipitation. Interestingly, only Ce(OH)3 showed a redox peak in both positive and negative ranges. The other RE hydroxides exhibited a redox peak only in the positive range. Therefore, in order to certify that Ce(OH)3 can be used as a negative electrode, symmetrical supercapacitors consisting of Ce(OH)3 as both positive and negative electrodes were assembled, and showed a voltage window of 1.3 V. Moreover, asymmetrical supercapacitors were successfully fabricated, in which the positive electrode was composed of La(OH)3, Pr(OH)3 or Nd(OH)3. These results may pave the way to novel negative electrode materials.
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Crystals
·
2022
·Vol. 12
·期 10
·1425
·
IF 2.67
Zijie Xiao,Tingting Tao,Jingting Shu,Wei Dang,Shusheng Pan,Wei Zhang
Studying the carrier recombination process in MAPb(Br1−yIy)3single crystals (SCs) is important for its application in the optoelectronic field. In this work, a series of MAPb(Br1−yIy)3SCs with varied Br/I compositions have been studied. Steady-state photoluminescence (PL) spectra, time-resolved photoluminescence (TRPL) spectra and time-resolved microwave photoconductivity (TRMC) were used to understand the radiative and non-radiative recombination processes of MAPb(Br1−yIy)3SCs. By comparing the dynamics of TRPL and TRMC, we conclude that the dynamics of TRPL is dominated by the electron trapping process, which is in accordance with the fast decay component of TRMC kinetics, whereas the slower decay component in TRMC is dominated by the hole trapping process. Moreover, we find both the electron and hole trapping rates in mixed-halide perovskite MAPb(Br1−yIy)3(0 < y < 1) SCs are higher than that of mono-halide perovskite MAPbBr3SCs and MAPbI3SCs. This suggests mixed-halide crystals could introduce additional electron and hole trapping densities, which could be related to the fluctuation of Br/I compositions in the crystals. This work is helpful for understanding carrier recombination process in mixed-halide perovskite SCs.
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CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 41
·期 3
·307-313
·
IF 5.56
Run-Ze Yuan,Peng-Fei Cui,Yue-Jian Lin,Guo-Xin Jin
Comprehensive Summary Herein, we describe the synthesis of a carborane-supported octanuclear palladacycle complex, Pd 8 ( o -C 2 B 10 H 10 CS 2 CH 3 ) 4 Cl 4 (CH 3 CN) 4 (complex 1 ), with B(3)–H activations on o -carborane ligand. The substitution reaction of 1 has been explored, and three of its substituted complexes Pd 8 ( o -C 2 B 10 H 10 CS 2 CH 3 ) 4 Cl 4 (L) 4 (L = t BuNC, 2 ; L = C 5 H 5 N, 3 ; L = C 4 H 8 S, 4 ) have been synthesized. The m - and p -carborane disubstituted ligands m - and p -C 2 B 10 H 10 (CS 2 CH 3 ) 2 (ligands 5 and 6 ) as well as their B—H activated carborane complexes [ m -C 2 B 10 H 9 (CS 2 CH 3 ) 2 PdCl] ( 7 ) and [ p -C 2 B 10 H 8 (CS 2 CH 3 ) 2 ][PdCl( t BuNC)] 2 ( 8 ) have also been synthesized by the similar method. All of these complexes have been characterized, including X-ray single crystal diffraction, NMR spectroscopy, IR spectroscopy and elemental analysis methods.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Sihang Li,Juan Wang,Yujie Zhang,Anran Cheng,Peng Cai,Jinzhao Su,Yi Shen,Min Zhou,Kai Jiang,Kangli Wang
To reduce the dependence on traditional fossil energy, developing efficient energy storage systems is urgent. The reserves of aluminum resources in the earth’s crust are extremely rich, which makes aluminum-ion batteries a promising competitor of new energy storage devices. Here, we report a poly(3-methylthiophene)/graphene (P3TH/Graphene) composite as the cathode of an aluminum-ion battery. The adjustment of polymer chain spacing by the methyl side chain provides a channel conducive to the transport of large-size AlCl4– complexes. The addition of electron donor groups also changes the electron delocalization characteristics of polymers and improves the specific capacity of the material. At the same time, the in situ composite of graphene can enhance the Π–Π interaction to form a favorable electronic transmission channel. At a current density of 200 mA g–1, the P3TH/Graphene composite showed a specific capacity of ∼150 mA g–1. The flexible structure of the polymer also guarantees the excellent rate capability of the composite.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Wuhan Sang,Miaomiao Liu,Li Xu,Shilong Yang,Yanqin Wang,Caihua Zhang,Wen Lu
A binuclear Cu(II) complex, [Cu2L2(OAc)4]·H2O (Coupy-Cu), with 3-(pyridin-3-yl) coumarin as the ligand, was synthesized by the slow solvent evaporation method. Complex Coupy-Cu was characterized by elemental analysis and infrared spectroscopy, and its crystal structure was determined by X-ray single-crystal diffraction, revealing a distorted octahedral geometry around each copper center. The antiferromagnetically coupled dimeric structure was further confirmed by EPR and VSM, which indicated a diamagnetic singlet ground state (S = 0) with weak paramagnetic susceptibility. Complex Coupy-Cu exhibited favorable cytotoxic activity against a panel of human cancer cell lines (HeLa, A549, MCF-7, and HepG2), with anti-proliferative efficacy against HepG2 cells superior to that of oxaliplatin and induced 43.3% apoptosis at 20 µM in a concentration-dependent manner. It is worth emphasizing that the complex showed significantly lower toxicity toward normal cells compared to cisplatin and oxaliplatin, displaying a safety index 5.2 times that of oxaliplatin and 30.4 times that of cisplatin. Investigations via electronic absorption spectroscopy, fluorescence spectroscopy, viscosity measurements, and molecular docking indicated that the complex binds to calf thymus DNA (CT-DNA) primarily through an intercalative mode. This binding was further validated via molecular dynamics simulations, which demonstrated stable complex formation and a calculated binding free energy of −13.74 kcal mol−1, driven predominantly by van der Waals interactions.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2026
·
IF 4
Qingchen Luo,Xinyan Xu,Qian Fan,Fei Pan,Lei Zhao,Liang Zhao
BACKGROUND 2-Amino-3-methylimidazo[4,5- f ]quinoline (IQ), a typical heterocyclic amine, is a common dietary carcinogen raising gastric and colorectal cancer risks. As an abundant anthocyanin monomer with established antioxidant and anti-inflammatory activities, cyanidin-3- O -glucoside (C3G) might attenuate IQ toxicity. Nevertheless, whether and how C3G alleviates IQ-triggered gastrointestinal damage remains unclarified. This study investigated the protective mechanisms of C3G against IQ-induced gastrointestinal injury in mice using biochemical assays, histopathology, western blotting, 16S rRNA sequencing, and molecular simulation. RESULTS The results demonstrated that C3G significantly ameliorated IQ-induced gastric and colonic tissue damage. It effectively reduced key inflammatory markers (nitric oxide, interleukin-6, and tumor necrosis factor-α) and the oxidative stress marker MDA in repaired mouse tissues and serum, while elevating antioxidant enzyme levels. Western blot analysis revealed tissue-specific protective mechanisms. In gastric tissue, C3G activated the Keap1-Nrf2 pathway to enhance antioxidant capacity and suppressed the NF-κB pathway to attenuate inflammation. In the colon, C3G inhibited inflammation via MyD88/TLR4/NF-κB signaling and upregulated the expression of tight junction proteins to restore intestinal barrier function. Gut microbiota analysis revealed that C3G reversed IQ-induced dysbiosis and increased the relative abundance of beneficial bacteria such as Roseburia and Enterorhabdus . Molecular dynamics simulations demonstrated that C3G could enhance IKKβ stability and interfere with its phosphorylation by forming hydrogen bonds with residues ASP151 and ASP109. CONCLUSION This study elucidates that C3G alleviates IQ-induced gastrointestinal injury through a multidimensional mechanism involving microbiota modulation, antioxidation, anti-inflammation, and intestinal barrier repair, providing a theoretical basis for anthocyanin-based dietary interventions against heterocyclic amine toxicity. © 2026 Society of Chemical Industry.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2019
·
IF 2.29
Xuzhao Yang,Jun Wang,Yun Fang
A novel asymmetrical gemini ionic liquid, 1-(3-(trimethylammonio)prop-1-yl)-3-methylimidazolium bis(dicyanamide) ([N 111 C 3 MIM][N(CN) 2 ] 2 ), was synthesized and characterized by 1 H NMR, 13 C NMR. Thermal stability of [N 111 C 3 MIM][N(CN) 2 ] 2 was investigated through thermogravimetric analysis under pure nitrogen atmosphere. Heat capacity of pure [N 111 C 3 MIM][N(CN) 2 ] 2 was measured using differential scanning calorimetry in the temperature range 298.15–423.15 K and enthalpy H T -H 298.15K , and entropy S T -S 298.15K were obtained. Densities and viscosities were measured for the binary system of [N 111 C 3 MIM][N(CN) 2 ] 2 and isopropanol (IPA) over the entire range of mole fractions at various temperatures from 283.15 to 333.15 K under the pressure of 0.101 MPa. Moreover, the excess molar volumes ( V m E ) and the viscosity deviations (Δ η ) for the binary mixtures were determined and well fitted to the Redlich−Kister polynomials. The negative values of V m E and Δ η result from strong self-association and weak hydrogen bonding interaction between the molecules of [N 111 C 3 MIM][N(CN) 2 ] 2 and IPA. Excess Gibbs energy of activation (Δ G *E ) of viscous flow for the present binary mixtures were also calculated. Results have been discussed in terms of molecular interactions and structures.
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APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2016
·Vol. 181
·期 4
·1347-1359
·
IF 1.606
Dai Yong,Huan Bin,Zhang Hai-Sheng,He Yu-Cai
To increase the biocatalytic activity of Escherichia coli CCZU-T15 whole cells, choline chloride/glycerol ([ChCl][Gly]) was firstly used as biocompatible solvent for the effective biotransformation of ethyl 4-chloro-3-oxobutanoate (COBE) into ethyl ( S )-4-chloro-3-hydroxybutanoate [( S )-CHBE]. Furthermore, L-glutamine (150 mM) was added into [ChCl][Gly]–water ([ChCl][Gly] 12.5 vol%, pH 6.5) media instead of NAD + for increasing the biocatalytic efficiency. To further improve the biosynthesis of ( S )-CHBE (>99 % e.e. ) by E. coli CCZU-T15 whole cells, Tween-80 (7.5 mM) was also added into this reaction media, and ( S )-CHBE (>9 % e.e. ) could be effectively synthesized from 2000 and 3000 mM COBE in the yields of 100 and 93.0 % by whole cells of recombinant E. coli CCZU-T15, respectively. TEM image indicated that the cell membrane was permeabilized and lost its integrity and when the cell was exposed to [ChCl][Gly]–water media with Tween-80. Clearly, this bioprocess has high potential for the effective biosynthesis of ( S )-CHBE (>99 % e.e. ).
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2024
·
IF 3.1
Baoyan Ding,Wei Meng,Xiaoling Zang,Zhihua Lv
A small molecule, (S)-ethyl 1-(3-(4-chlorophenoxy)-2-hydroxypropyl)-3-(4-methoxyphenyl)-1H-pyrazole-5-carboxylate (SEC), has been reported to be capable of suppressing metastasis of prostate cancer (PCa) cells. In this study, SEC was used to study the metabolic responses of PCa cell lines (LNCaP, PC3, and DU145) with different metastatic potential and the alterations of mTOR, p-mTOR, AMPK, and p-AMPK levels, when the PCa cells were inhibited. The ultra-high performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS)-based analysis showed that SEC induced the decreases of intracellular metabolites including glutamic acid, glutamine, and histidine (LNCaP); creatinine, citric acid/isocitric acid, and aspartic acid (PC3); and spermidine, S-hydroxymethylglutathione, LPE (20:3), and palmitic amide (DU145), and the increases of intracellular LPC (18:0) (LNCaP); tyrosine, pyroglutamic acid/pyrroline hydroxycarboxylic acid (PC3); and tyrosine, phenylalanine, phenylacetylglycine, spermine, histidine, and choline (DU145). SEC also caused the decrease of extracellular N1-acetylspermidine (LNCaP), erythronic acid/threonic acid (PC3 and DU145), and nicotinic acid/picolinic acid (DU145), and the increase of extracellular 5’-methylthioadenosine (DU145). High metastatic PC3 and DU145 cells exhibited changes in aromatic amino acid metabolism including tyrosine metabolism, phenylalanine, tyrosine, and tryptophan metabolism, and phenylalanine metabolism (PC3 and DU145), TCA cycle (PC3), arginine and proline metabolism, and glycerophospholipid metabolism (DU145), different from the low metastatic LNCaP cells, which had changes in alanine, aspartate, and glutamate metabolism, and arginine biosynthesis. In addition, the levels of p-mTOR and p-AMPK were shown to be obviously downregulated and upregulated, respectively, in high metastatic PC3 and DU145 cells upon SEC inhibition, while this behavior was not detected in LNCaP cells.
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