JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xueying Wang,Yida Lei,Liang Shi,Jie Li,Lichuan Jin,Yulong Liao,Kui Liu,Huaiwu Zhang
The adjustment of crystal structures and properties by ion substitution has received increasing interest in recent years to solve issues related to the preparation of LTCC microwave devices. In this work, Fe 3+ ions were substituted in BaFe 12 O 19 sintered at a low temperature (920 °C). The changes in microstructures, dielectric characteristics, and magnetic properties were all examined. The ferromagnetic resonance linewidth (Δ H ) of BaM ferrite was measured at magnetic fields from 6000 to 24,000 Oe. The results revealed well-grown microstructures of BaM ferrite grains at 920 °C to form typical hexagonal structures. The increase in substitution of Ga 3+ ions decreased the lattice constant and cell volume of the crystals. More interestingly, the dielectric and magnetic properties depicted significant changes in the original dielectric and magnetic parameters of BaM after the substitution of Ga 3+ ions. The permittivity ( ε′ ) rose to a maximum of 16.36 at x = 0.4, while the dielectric loss angle tangent (tan δ ε ) declined to 1.2 × 10^ −3 . As Ga 3+ ions rose, the saturation magnetization 4π Ms decreased from 3168.58 Gauss to 2571.18 Gauss. The remanence ( Mr ) reached a maximum value of 31.07 emu/g at x = 0.4. The ferromagnetic resonance linewidth (Δ H ) of BaM ferrite sample at 31 GHz attained a minimum value of 4216.336 Oe at x = 0.8. In sum, these findings look promising for future fabrication of LTCC microwave RF devices.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MASS SPECTROMETRY
·
2019
·Vol. 54
·期 3
·239-249
·
IF 2.267
Hua-Ming Xiao,Xian Wang,Xing Yang,Feng Zheng,Yu-Qi Feng
Hydralazine has been widely employed in the development of drugs, derivatization reagents, and ligands. In the present work, we reported a new type of dehydrogenated ion [M − H] + that was produced from the hydralazine derivative of hexanal in electrospray ionization mass spectrometry (ESI-MS). The formation of [M − H] + ions in the ESI-MS was found to be independent on the mobile phase composition of the liquid chromatography and ESI source parameters. A series of hydralazine derivatives of aldehyde were investigated to confirm this phenomenon. The results showed that hydralazine derivatives of aldehydes that contained an sp 3 hybridization carbon with a hydrogen at the α-position of aldehydes could form the unexpected [M − H] + ions, whereas hydralazine derivative of acetone could only generate [M + H] + ion in the ESI-MS. We proposed the possible formation mechanism of [M − H] + ion for the hydralazine derivatives of aldehydes: the [M − H] + ion was possibly formed by the loss a hydrogen molecule (H 2 ) from the protonated ion [M + H] + . The results obtained from density functional theory (DFT) calculations supported this proposed formation mechanism of [M − H] + ion.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomedicine
·
2018
·
IF 5.005
Yuanyuan Xie,Xiaofan Zeng,Xian Wu,Jun Hu,Yanhong Zhu,Xiangliang Yang
Aim: To study the effects of combinational treatment of hyperbaric oxygen (HBO) and nanotemozolomide in glioma. Materials & methods: Temozolomide (TMZ)-loaded porous silicon nanoparticles (TMZ/PSi NPs) were prepared. In vitro and in vivo evaluations were performed. Results: The cell uptake of TMZ/PSi NPs could be tracked by autofluorescence of porous silicon. The concentration of oxygen in tumor was improved and the antitumor rate was increased to 84.2% in the TMZ/PSi NPs combined with HBO group. The viability of hypoxia-induced glioma C6 cells was decreased and cell cycle was arrested at G2/M phase in response to TMZ/PSi NPs treatment with HBO compared with continuous treatment with hypoxia. Conclusion: The combinational treatment of TMZ/PSi NPs and HBO could be a promising therapeutic strategy for glioma.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2015
·Vol. 641
·期 11
·1953-1958
·
IF 1.16
Yunsheng Liu,Dajiang Mei,Jingli Xu,Yuandong Wu
Sodium magnesium selenite NaMg 2 (OH)(SeO 3 ) 2 and rubidium zinc selenite RbZn 2 (OH)(SeO 3 ) 2 were prepared by hydrothermal reactions. The crystal structures of the title compounds were determined by single-crystal X-ray diffraction. NaMg 2 (OH)(SeO 3 ) 2 crystallizes in the orthorhombic space group Pnma (no. 62) with lattice parameters a = 13.1919(10), b = 6.0415(4), c = 8.2182(6) Å, and Z = 4 and RbZn 2 (OH)(SeO 3 ) 2 crystallizes in the triclinic space group P (no. 2) with lattice parameters a = 4.8698(5), b = 7.3446(8), c = 11.7796(12) Å, α = 82.554(3), β = 78.456(2), γ = 71.603(3)°,and Z = 2. The structure of NaMg 2 (OH)(SeO 3 ) 2 is a three-dimensional framework consisting of edge-sharing MgO 6 octahedra and trigonal pyramidal SeO 3 2– groups, whereas the structure of RbZn 2 (OH)(SeO 3 ) 2 is a two-dimensional layers structure consisting of corner-sharing [Zn 2 O 7 ] dimers linked by trigonal pyramidal SeO 3 2– groups. The compounds were characterized by the solid state UV/Vis/NIR diffuse reflectance, and FT-IR spectroscopy.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yining Ma,Huaijuan Zhou,Jingting Zhu,Shidong Ji,Shanhu Bao,Rong Li,Ping Jin
Flake-like VO 2 (M) has been successfully synthesized by annealing plate-like (NH 4 ) 0.6 V 2 O 5 in vacuum and its thermochromicity was investigated. Preparation conditions such as temperature and vacuum degree have been varied to obtain the pure phase. The formation mechanism from ammonium vanadium bronze to VO 2 (M) has been explored. The flake-like VO 2 (M) shows an excellent thermochromicity; the infrared modulation at 2500 nm was up to 56.6% with a 30% visible transmittance which will be beneficial for smart windows, smart curtains or other applications.
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Gao Hang,Zhu Yuqin,Luo He’an,Lv Yang,Liu Pingle
Co–xCaO/g-C 3 N 4 catalysts were prepared using incipient wetness impregnation method and applied in isophthalonitrile hydrogenation to M-xylenedimethylamine. The characterization results and experimental data indicate that introduction of CaO crates large number of basic sites and leads to electron rich Co, hence inhibits the side reaction and improves the selectivity to M-xylenedimethylamine. 10Co–2CaO/g-C 3 N 4 gives the best catalytic performance of 100% conversion of isophthalonitrile and 95% selectivity to M-xylenedimethylamine without any alkaline additives in the reacion system. This work is valuable for the design and preparation of hydrogenation catalysts with rich basic sites and provides a green process for nitrile compounds to amine.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Li Chen,Jing Geng,Renhui Gao,Qianqian Xu,Zheng Guo
Metal oxide-based gas sensors encounter challenges in effectively detecting hazardous benzenes due to their stability and structural similarities. Here we report an innovative in situ growth method for synthesizing Fe 2 O 3 /Si-FeWO 4 heterostructure nanotubes (NTs) using highly negatively charged multivacant lacunary TBA 4 H 6 [SiW 9 O 34 ]·2H 2 O ( α -SiW 9 ) and Fe 3+ as precursors. A two-step process involving electrospinning followed by a thermal oxidation method was employed to synthesize a series of the uniform Si-FeWO 4 decorated Fe 2 O 3 heterostructure NTs. Considering the rich Fe 2 O 3 /Si-FeWO 4 active interfaces, rapid electron transfer, and high specific surface area, the optimal Fe 2 O 3 /Si-FeWO 4 based sensors demonstrate significantly higher sensitivity (S = 27.5) towards 50 ppm m-xylene in comparison to pristine Fe 2 O 3 (S = 1.8). Furthermore, the Fe 2 O 3 /Si-FeWO 4 exhibits excellent stability, humidity resistance, and high selectivity for m-xylene. This work offers an efficient, cost-effective strategy to synthesize Fe 2 O 3 /Si-FeWO 4 heterostructure NTs, with prospects for synthesizing other advanced sensing heterostructure nanomaterials with lacunary polyoxometalates as precursors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lushuang Xu,Qinyue Chen,Yangwei Qian,Jin Wang,Chenxi Wang,Rui Fan,Jia-Wei Shen,Qiying Shen
Nanozymes provide therapeutic benefits against a diverse range of malignant tumors. However, their antitumor potencies are seriously impaired by their low catalytic efficiencies and the off-target toxicities caused by their “always-on” catalytic activity. Herein, we developed multifunctional nanoparticles co-loaded with ultra-small copper sulfide nanoparticles (CuS NPs) and disulfiram (DSF) (DSF/CuS@M). These nanoparticles had peroxidase-like activity and served as (near-infrared) NIR-activatable proenzymes to achieve synergistic in situ chemotherapy, chemodynamic therapy (CDT), photothermal therapy (PTT), and cuproptosis-based antitumor therapy. DSF/CuS@M not only provided PTT as NIR-activatable proenzymes but also enabled complete DSF and Cu 2+ release. Non-toxic DSF was converted into diethyldithiocarbamic acid (DDC) through a glutathione (GSH)-mediated metabolic reaction, leading to the generation of cytotoxic Cu(DDC) 2 in situ , which enhanced cell apoptosis. Cu 2+ was converted into Cu + by GSH, and this Cu + catalyzed the conversion of H 2 O 2 into hydroxyl radicals (·OH) to induce CDT. Moreover, Cu + could also bind to dihydrolipoyl transacetylase (DLAT) in the tricarboxylic acid (TCA) cycle, thereby inducing cuproptosis. These results demonstrate that the NIR-activatable proenzyme developed in this study is effective and safe for synergistic therapy against malignant tumors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2025
·
IF 3.1
Yingxia Guo,Jiaxin Zhang,Runran Mei,Zihan Tang,Meichen Liu,Xixian Weng,Meiyun Shi,Lei Yin
Addressing critical gaps in understanding the in vivo behavior of polyethylene glycol (PEG)-based excipients, this study systematically elucidates the biological fate of methoxy-PEG₆-hydroxyl (M-PEG₆-OH) through comprehensive pharmacokinetic and metabolic investigations in rats. Employing a validated ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) methodology, we reveal distinctive biodistribution characteristics including rapid systemic clearance (Half-life (t 1/2 ) = 1.92 ± 1.16 h) and extensive tissue penetration (Apparent volume of distribution (V d ) = 0.84 ± 0.45 L/kg), suggesting efficient extravascular dissemination. Excretion pathways analysis demonstrated predominant renal elimination, with 59.03 % of the administered dose recovered in urine within 48 h post-IV injection, contrasting with minimal fecal excretion (0.99 %). Quantitative metabolite profiling identified M-PEG₅-CH₂COOH as the oxidative transformation product through terminal hydroxyl modification. The significantly higher relative abundance of metabolites (M-PEG 5 -CH 2 COOH) in urine compared to feces within the same time period provides critical insights into the biotransformation processes and metabolic pathways of the PEG polymer. These findings establish the first systematic evidence of metabolic trajectory and elimination mechanisms for M-PEG-OH, offering vital references for optimizing PEGylated drug delivery systems with enhanced biocompatibility and predictable safety profiles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Min Chen,Xubo Huang,Chen Chen,Wenqing Hou,Yiming Xu
Production of H 2 from water splitting is challenging. Herein, we report an increased production of H 2 on Zn 0.5 Cd 0.5 S (ZnCdS) in aqueous solution under a 420 nm LED lamp, via 4 wt % MCo 2 O 4 (M = Mg, Cr, Mn, Fe, Co, Ni, Cu, and Zn). Without addition of sacrifices, the rate of H 2 evolution ( R H , in a unit of mmol g ―1 h ―1 ) was 0.0154 for ZnCdS, and 0.057―0.551 for MCo 2 O 4 /ZnCdS. On addition of Na 2 S/Na 2 SO 3 , the corresponding R H increased to 18.5 and 31.5―78.2, respectively. In both cases, no H 2 was observed for MCo 2 O 4 . However, the R H obtained in presence of Na 2 S/Na 2 SO 3 had a negative correlation with M s and R 2 , respectively, where M s was the magnetization degree of MCo 2 O 4 , and R 2 was the charge transfer resistance for MCo 2 O 4 /ZnCdS at solid-liquid interface. Electrochemical measurement showed that MCo 2 O 4 /ZnCdS was more active than ZnCdS for proton reduction, water oxidation, and water(sulfide/sulfite) photo-oxidation, respectively. According to the solid photoluminescence, band parameters, and open circuit potentials, formation of a p-n junction is proposed, which facilitates the photoelectron transfer to ZnCdS for proton reduction, and the photohole transfer to MCo 2 O 4 for water (sulfide/sulfite) oxidation. It is also proposed that the magnetic field of MCo 2 O 4 inhibits the charge transfer between MCo 2 O 4 and ZnCdS. This work suggests that MCo 2 O 4 spinels are good co-catalysts, but their magnetization need to be minimized.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Huimin Song,Naizheng Wang,Wang Liu,Jingcheng Feng,Jun Shen,Wei Dai,Zheshuai Lin,Jiyong Yao,Guochun Zhang
A gadolinium-rich borate Gd17.33(BO3)4(B2O5)2O16 was successfully grown by the high-temperature solution method using the Rb2O–B2O3 flux. The crystal crystallizes in centrosymmetric space group C2/m with lattice constants a = 18.4300(2) Å, b = 3.7400(4) Å, c = 14.2047(16) Å, and β = 119.8550(12)°. Two different honeycomb-like [GdO] layers alternately arrange in the order ABAB forming the three-dimensional framework, in which the isolated [B2O5] and [BO3] units fill in channels of the 12-membered and 10-membered [GdO] polyhedral rings, respectively. The UV cutoff edge of Gd17.33(BO3)4(B2O5)2O16 is less than 240 nm. The maximum −ΔSm,max is 26.53 J kg–1 K–1 or 174.70 mJ cm–3 K–1 (T = 4.4 K and ΔH = 7 T) as investigated by the isothermal magnetization method.
研究领域:
材料科学
·
固体物理学
·
晶体学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）