RUSSIAN CHEMICAL BULLETIN
·
2025
·Vol. 74
·期 3
·807-817
·
IF 0
Balakina A. A.,Amozova V. I.,Stupina T. S.,Mumyatova V. A.,Podgurskaya A. D.,Gadomsky S. Ya.
A new method for the synthesis of pyridoxine salts with dicarboxylic acids was proposed. The specific features of the synthesis include the preliminary generation of free pyridoxine from the hydrochloride form by treatment with a solution of triethylamine in chloroform and conduction of the reaction of pyridoxine with dicarboxylic acid in a specially selected solvent mixture. The combination of pyridoxine as a known antioxidant and fumarate as an activator of the transcription factor Nrf2 in one molecule gave rise to a unique structure, bis[3-hydroxy-4,5-bis(hydroxymethyl)-2-methylpyridinium] fumarate (DPNF). In vitro experiments showed the ability of this compound to bind superoxide, suppress lipid peroxidation processes, and behave as a mitochondrial cytoprotective agent and Nrf2 activator. The results of the study can be used to develop a new type of drugs based on activators of the transcription factor Nrf2 to protect cells and tissues from oxidative damage.
✓ 已验证
DOI
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
H.L. Pan,Y.X. Mao,Y.K. Yang,Y.W. Zhang,H.T. Wu
Li 2 Mg 3 Ti 1-X (Mg 1/3 Ta 2/3 ) X O 6 (x = 0.00, 0.05, 0.10, 0.15, 0.20) solid solution ceramics were prepared by the conventional solid-state reaction method. Rietveld refinements, Raman spectra, infrared spectra, polarizability and bond energy were used to research the changes of microwave dielectric properties of these solid solutions. With the increase of x values from 0 to 0.2, dielectric constants ( ε r ) gradually increased, which could be explained by the variations of the polarizability, infrared resonant modes and Raman vibration modes. The variations of the quality factor ( Q·f ) could be explained by the changes of the bond valences. The temperature coefficient of resonant frequency ( τ ƒ ) correlated with the bond energy of Ti O bonds. A small quantity of (Mg 1/3 Ta 2/3 ) 4+ can obviously improve the microwave dielectric properties. Excellent microwave dielectric properties of ε r = 14.70, Q·f = 200,600 GHz and τ f = −11.83 ppm/°C were obtained for Li 2 Mg 3 Ti 0.95 (Mg 1/3 Ta 2/3 ) 0.05 O 6 ceramic sintered at 1550 °C.
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 25
·2001524
·
IF 11.459
Wei Zhang,Huangxu Li,Zhian Zhang,Ming Xu,Yanqing Lai,Shu-Lei Chou
Developing high-voltage cathode materials is critical for sodium-ion batteries to boost energy density. NASICON (Na super-ionic conductor)-structured Na x MnM(PO 4 ) 3 materials (M represents transition metal) have drawn increasing attention due to their features of robust crystal framework, low cost, as well as high voltage based on Mn 4+ /Mn 3+ and Mn 3+ /Mn 2+ redox couples. However, full activation of Mn 4+ /Mn 3+ redox couple within NASICON framework is still a great challenge. Herein, a novel NASICON-type Na 4 MnCr(PO 4 ) 3 material with highly reversible Mn 4+ /Mn 3+ redox reaction is discovered. It proceeds a two-step reaction with voltage platforms centered at 4.15 and 3.52 V versus Na + /Na, delivering a capacity of 108.4 mA h g −1 . The Na 4 MnCr(PO 4 ) 3 cathode also exhibits long durability over 500 cycles and impressive rate capability up to 10 C. The galvanostatic intermittent titration technique (GITT) test shows fast Na diffusivity which is further verified by density functional theory calculations. The high electrochemical activity derives from the 3D robust framework structure, fast kinetics, and pseudocapacitive contribution. The sodium storage mechanism of the Na 4 MnCr(PO 4 ) 3 cathode is deeply studied by ex situ X-ray diffraction (XRD) and ex situ X-ray photoelectron spectroscopy (XPS), revealing that both solid-solution and two-phase reactions are involved in the Na + ions extraction/insertion process.
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 22
·期 2
·441-452
·
IF 2.316
Yang Kaiqi,Ma Xiaoyan,Sun Kun,Liu Yi,Chen Fang
Gel polymer electrolyte (GPE) based on octa(3-chloropropyl)-polyhedral oligomeric silsesquioxane (OCP-POSS)-modified polyvinylidene fluoride/poly(acrylonitrile) /poly(methylmethacrylate) (PVDF/PAN/PMMA) fibrous membrane was prepared by electrospinning method to improve the thermal stability of GPE and prevent the leakage of liquid electrolyte for lithium ion battery. The effect of OCP-POSS content on the morphology, porosity and electrolyte uptake, mechanical strength, thermal stability of spinning fibrous membrane and ionic conductivity, electrochemical stability window, and interface resistance of GPE was investigated. The cycle performance of cells assembled with GPE was also tested. The results show that the spinning fibrous membrane with 10 wt% OCP-POSS possesses high electrolyte uptake (660%) and excellent thermal stability. The ionic conductivity of corresponding GPE is 9.23 × 10 −3 S cm −1 at room temperature and the electrochemical stability window is up to 5.82 V; the interface resistance of 10 wt% OCP-POSS modified GPE decreases by 42% after 168 h compared with pure PVDF/PAN/PMMA GPE. Furthermore, cells assembled with 10 wt% OCP-POSS modified GPE show high discharge capacity (166.5 mA h g −1 at 0.1 C) and excellent cycle stability during 50 cycles. The results indicate that the GPE could improve the safety of lithium ion battery and show great potential in lithium ion battery applications.
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2020
·
IF 6.444
Neng-Jian Huang,Qiao-Qi Xia,Zhao-Hui Zhang,Li Zhao,Guo-Dong Zhang,Jie-Feng Gao,Long-Cheng Tang
A flame-retardant graphene oxide (GO) based nanocomposite paper was prepared for efficient fire alarm response via a one-step and green 3-mercaptopropyltrimethoxysilane (MPTS) functionalization process. Such MPTS modification not only improves thermal stability and flame resistance of GO network, but produces ultra-fast flame detection and efficient fire early warning response. Typically, the MPTS-GO-10 wt% paper shows a flame detection response signal of about 1.0 s and improved fire early warning response time at a relatively temperature of 200 °C. The structural observation and analysis suggest that the thermal reduction behavior of GO network can be promoted by the sulfydryl groups of MPTS molecules at high temperature, thus producing the rapid and sensitive transition of electrical resistance form insulating GO into conductive reduced GO network. The MPTS functionalization developed here show promising to tailor fire early warning response of flame-retardant GO based fire alarm sensor for potential fire safety and prevention applications.
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Fuwei Sun,Haibo Liu,Hanlin Wang,Daobing Shu,Tianhu Chen,Xuehua Zou,Fangju Huang,Dong Chen
Natural iron-bearing minerals have been proven to be effective for activating H 2 O 2 to produce OH, which can be used to degrade organic pollutants . In this study, the performance of siderite to degrade sodium sulfadiazine via catalytic H 2 O 2 degradation was investigated at different solution pH values from 3 to 9. An interesting discovery was made: the performance of the siderite-H 2 O 2 system was excellent under acidic, neutral, and even alkaline conditions. The influence of various factors (e.g. initial concentration, anions, natural organic matters, etc.) on the system under different pH conditions was investigated, which confirmed that siderite exhibited an excellent catalytic performance. By combining EPR characterization with scavenger research, it was proposed that dissolved iron (Fe 2+ ) mainly initiated the homogenous Fenton reaction to degrade pollutants under acidic conditions, while structural Fe 2+ species present in siderite triggered Fenton-like reactions under neutral or even alkaline conditions. From the SEM and XPS characterizations, oxidation and dissolution of Fe 2+ on the surface were also observed, confirming our inference concerning the different reaction mechanisms. The experimental findings show that this siderite-H 2 O 2 system can be used in solutions with pH values from 3 to 9 and that siderite plays a positive role in soil and groundwater remediation when H 2 O 2 is used as an oxidant.
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Yini Liu,Rui Wang,Debao Wang,Zhilan Sun,Fang Liu,Dequan Zhang,Daoying Wang
Food safety caused by microbial contamination is an important problem that is difficult to solve for the food industry. In this study, the effective antibacterial hydrogel from electrospinning nanofibers prepared using gelatin, chitosan, and 3-phenyllactic acid (PLA) after water absorption was used to improve the antibacterial performance and prolong the shelf life of chilled chicken meat. The structure, water-absorbing ability, antibacterial ability, and fresh-keeping ability of this hydrogel were characterized. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the carboxyl group in PLA reacted with the amino group in chitosan, which formed amide bond under acidic conditions. This bond enhanced the water absorption and stability of the hydrogel. Low-field nuclear magnetic resonance showed that the addition of PLA not only changed the structure of hydrogels but also changed the ratio of different states of water in the hydrogels. The swelling ratio of GCP-1 hydrogel was two times larger than that of GCP-0 hydrogel, and scanning electron micrographs showed that the GCP-1 hydrogel after water absorption had a unique spongy shape. Furthermore, the GCP-1 hydrogel effectively inactivated foodborne pathogens Staphylococcus aureus and Escherichia coli and prolonged the preservation of chilled chicken to 4 days. This study provides an innovative way to apply electrospinning nanofibers in food packaging.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Liling Cao,Shengzi Zhang,Dan Zhao,Bingxuan Li,Tao Yan,Guangsai Yang,Zheshuai Lin,Min Luo,Ning Ye
A new d10 transition-metal iodate fluoride, namely, Cd3(IO3)(IO4)F2·0.1CdO, was successfully designed and synthesized via the mid-infrared hydrothermal method. It crystallizes in the polar space group R3m and features the coexistence of the [IO3]− and [IO4]3– groups. Cd3(IO3)(IO4)F2·0.1CdO has a strong second-harmonic-generation response of about 3.0 times that of KDP(KH2PO4), large birefringence (0.133 at 546.1 nm), and a wide energy band gap (4.00 eV). In addition, the power laser damage threshold (LDT) measurement indicated that it possesses a high LDT of 84.29 MW/cm2, which is about 30 times that of AgGaS2. These superior properties showed that Cd3(IO3)(IO4)F2·0.1CdO may be an excellent nonlinear-optical crystal for visible and mid-infrared application.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 5
·3380-3389
·
IF 3.5
Ziqi Ni,Fenglin Wang,Yeqing Guan,Kaijia Hu,Fengyuan Zhao,Xingyu Chen,Yicong Ye,Weijun Zhang,Shuxin Bai
The three key properties required for microwave dielectric ceramics are suitable dielectric constant ( ε r ), high quality factor ( Q × f ), and near-zero temperature coefficient of resonant frequency ( τ f ). Due to the intricate coupling relationship among these three properties, regulating one often leads to the deterioration of the remaining two. In this study, the synergetic regulation of dielectric properties of Ca 0.7 Nd 0.2 TiO 3 was investigated to reduce τ f to near-zero while maintaining its high ε r by A- and B-site substitutions. To avoid the seesaw effect and improve the efficiency of composition optimization, machine learning method was introduced in this study. First, the models for predicting dielectric properties were fitted based on a small amount of high-quality data gathered via a uniform experimental design. Then the dielectric properties of 1037 compositions of (Ca 0.7 Nd 0.2 ) 1− x (Li 0.5 Nd 0.5 ) x Ti 1− y (Mg 1/3 Nb 2/3 ) y O 3 were predicted, from which 69 microwave dielectric ceramics with near-zero τ f and adjustable ε r of 95–125 were quickly picked out, and 5 of them were proved by experiments with very high prediction accuracy. This work was finished within a period of 1 month, which proves the obvious acceleration of composition designing process of microwave dielectric ceramics with the aid of machine learning.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Daqin Chen,Gaoliang Fang,Xiao Chen
Tunability of emitting colors of perovskite quantum dots (PQDs) was generally realized via composition/size modulation. Due to their bandgap absorption and ionic crystal features, the mixing of multiple PQDs inevitably suffers from reabsorption and anion-exchange effects. Herein, we address these issues with high-content Mn2+-doped CsPbCl3 PQDs that can yield blue-excitable orange Mn2+ emission benefited from exciton-to-Mn energy transfer and Cl-to-Br anion exchange. Silica-coating was applied to improve air stability of PQDs, suppress the loss of Mn2+, and avoid anion-exchange between different PQDs. As a direct benefit of intense multicolor emissions from Mn2+-doped PQD@SiO2 solid phosphors, a prototype white light-emitting diode with excellent optical performance and superior light stability was constructed using green CsPbBr3@SiO2 and orange Mn: CsPb(Cl/Br)3@SiO2 composites as color converters, verifying their potential applications in the field of optoelectronics.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Yongquan Zhang,Hongchang Gao,Jingshun Wang,Qingguo Chi,Tiandong Zhang,Changhai Zhang,Yu Feng,Yue Zhang,Dianxue Cao,Kai Zhu
All-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage batteries due to their high energy density and high safety. Polyethylene oxide (PEO) is an ideal solid-state electrolyte due to its high chain flexibility, high dielectric constant, and strong dissociation ability towards lithium salts. However, the application of PEO is severely hindered by drawbacks such as low ion conductivity at room temperature and low electrochemical window. In this work, we constructed a Li1.25Al0.25Zr1.75(PO4)3 (LAZP)/PEO composite solid-state electrolyte (CSSE) with improved ion conductivity, enlarged electrochemical window, and stable charge–discharge cycle performance. The CSSE leads to an obvious LiF layer and Li2CO3 formation at the interface of lithium metal. Meanwhile, the addition of LAZP reduces the side reaction between PEO and the lithium metal significantly and suppresses the deterioration of ion conductivity. In addition, we modified LiFePO4 (M-LFP), the cathode sheet of the ASSLMBs, by adding an appropriate proportion of multi-walled carbon nanotubes (MWCNTs), PEO and lithium bis(trifluoromethane sulfonimide) (LiTFSI) to improve the ionic and electronic conductivity inside the cathode of the ASSLMBs. The Li/CSSE/M-LFP full cell exhibits a specific discharge capacity of 152 mA h g−1 at 60 °C and 2 C rate and a capacity retention rate of 93.5% after 200 cycles at 1 C. This work demonstrates an effective strategy for increasing the specific capacity, rate ability and long-cycle performance of ASSLMBs.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Guiyin Li,Bo Wang,Le Zhao,Xiaohang Shi,Guanxiong Wu,Wei Chen,Lixian Sun,Jintao Liang,Zhide Zhou
Glypican-3 (GPC3) protein is considered as an effective and specific biomarker for the accurate diagnosis of hepatocellular carcinoma (HCC), and there is a critical demand to construct strategies with shorter time, lower cost noise and higher sensitivity. In this study, a biosensor for label-free detection of GPC3 was prepared by modifying GPC3 aptamer (GPC3 Apt ) on the surface of Si-based light addressable potentiometric sensor (LAPS) chip modified by reduced graphene oxide/polyetherimide/gold nanoparticles (rGO/PEI/AuNPs). Among them, GPC3 Apt with a low equilibrium dissociation constant was used as a biorecognition molecule to recognize and capture GPC3. The rGO/PEI/AuNPs decorated on the LAPS surface could enlarge the surface area for GPC3 Apt immobilization and provide more active sites for GPC3 Apt to bind effectively with the target GPC3. When a bias voltage was provided to the LAPS system, the forming GPC3-GPC3 Apt complexs on the sensing interface of LAPS would cause the potential of the sensitive membrane surface to change and generate a corresponding offset response in photocurrent-voltage (I-V) curves. The potential shift and GPC3 concentration showed a good linear range from 0.1 to 100.0 μg/mL with a detection limit of 40.0 ng/mL (S/ N = 3) and a sensitivity of 1.33638 mV/μg/mL. In addition, the LAPS detection system also has good specificity and stability, which can be used for the detection of GPC3 in spiked serum samples.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）