CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Alimujiang Yalikun,Yanhong Wang,Nian Shi,Yiwen Chen,Hao Huang,Hyun-Joo Koo,Zhongwen Ouyang,Zhengcai Xia,Reinhard K. Kremer,Myung-Hwan Whangbo,Hongcheng Lu
We prepared a new polar layered quantum magnet Ba2Cu3(SeO3)4F2, by a combined use of F– and pyramidal SeO32– anions, determined its crystal structure by X-ray diffraction, and characterized its magnetic properties by magnetization, electron spin resonance (ESR) and specific heat measurements, and by density functional theory calculations. The title compound has first experimentally reported bitriangular chains of Cu2+ ions aligned along the b direction to form layers parallel to the ab plane, and these layers are separated by Ba2+ ions. The magnetic susceptibility data reveal that, despite strong predominant antiferromagnetic intrachain interactions indicated by the large negative Weiss temperature θ of −143.9 K within bitriangular chains, no long-range order occurs down to 2 K. The latter, further confirmed by the specific heat measurements, is attributed to the extremely weak interlayer interaction. The spins in each bitriangular chain become ferrimagnetically ordered to exhibit a 1/3-magnetization plateau, which persists at least up to 30 T. This reveals that each bitriangular chain acts as an S = 1/2 entity at low temperatures, as observed from the decrease of the effective magnetic moment Peff from 3.67 μB in the high temperature range to 1.89 μB in the low temperature range, equivalently, from three free Cu2+ ions to only one effective Cu2+ ion per formula unit. In each layer of Ba2Cu3(SeO3)4F2, the interaction between adjacent ferrimagnetic chains is ferromagnetic rather than antiferromagnetic, contrary to the observations in other reported cases.
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高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 3
·1060-1068
·
IF 4.174
Run-Ze Yuan,Peng-Fei Cui,Shu-Ting Guo,Guo-Xin Jin
Herein, we describe the synthesis of tetraphenylphosphonium o-carboranyl dithiocarboxylate (Ligand 1) and methyldithiocarboxyl-o-carborane (Ligand 2). The complexes [Cp*M(o-C2B10H11CS2)Cl] (M = Ir (3); Rh (4)) and [Cp*M(o-C2B10H11CS2)2] (M = Ir (5); Rh (6)) have been synthesized based on Ligand 1. The selective B–H bond activation of Ligand 2 has also been explored, leading to the synthesis of the B–H activated complex [Cp*Ir(o-C2B10H10CS2CH3)Cl] (7) and four of its substituted derivatives (8, 9, 10 and 11). All of these compounds have been characterised through single-crystal X-ray diffraction, NMR, IR spectroscopy and elemental analysis.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Ziyu Chen,Zejia Zhao,Jiaxin Yang,Xiaoli Gao,Xu Sang,Adnan Khan,Rui Xu,Ming Feng,Lisa Liu,Qixin Liu,Feng Song
The utilization and residue of pesticides exist multifaceted non-restrictive effects on food safety and ecological protection. Exploitation of rapid and sensitive pesticide detection technology is imperative and will be helpful to better control the detriment of pesticides. Here, a novel flexible film has been prepared based on organic-inorganic composite materials (coumarin-3-carboxylic acid and GdF 3 :Sm 3+ ), which exhibits good optical performance and can well realize the timely and maneuverable detection for different pesticides. The spectra and luminescence properties of each composition in the composite have been analyzed systematically, and the coordinated fluorescence emission of Sm 3+ and coumarin-3-carboxylic acid is revealed at an excitation wavelength of 373 nm. Besides, the energy transfer mechanism is also researched by both experiment and theoretical calculation. The actual detection of different pesticides reveals differential fluorescence influence degree. Meanwhile, the flexible film still possesses sensitive recognition in the presence of micro concentration of pesticides. Results indicate that the flexible film with good optical performance can produce visual detection ability and provide a promising strategy for wider detection applications.
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高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Xuehua Dong,Ying Long,Xiaoyu Zhao,Ling Huang,Hongmei Zeng,Zhien Lin,Xin Wang,Guohong Zou
Two new antimony fluoride sulfates named A6Sb4F12(SO4)3 (A = Rb, Cs) with unique crown-like clusters have been successfully synthesized by introducing Sb3+ with a stereochemically active lone pair in the sulfate system through a facile hydrothermal method. The structure regulation induced by the cation sizes results in the symmetry difference in these two title compounds, i.e., Rb6Sb4F12(SO4)3 crystallizing in the polar noncentrosymmetric (NCS) space group of P3 and Cs6Sb4F12(SO4)3 in the centrosymmetric (CS) space group of P1̅. Detailed characterizations, including XRD, thermal behaviors, optical properties, and the theoretical calculations, for these two compounds have been performed. The discovery of the unique crown-like clusters observed in A6Sb4F12(SO4)3 (A = Rb, Cs) enriches the diversity of structures for antimony sulfates systems. Simultaneously, a summary and comparison for all reported antimony halide sulfates has been made to illustrate the synergistic effect of the stoichiometric ratio and cation sizes on the macroscopic centricity and the framework structure, which will guide the systematical discovery of antimony(III)-based functional materials in future.
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高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Zhuqing Sun,Yongxia Li,Haowen Bai,Shenghang Jin,Haibo Zhang,Guanying Cao
All inorganic lead halide cesium perovskite quantum dots (QDs) have attracted much attention due to their excellent luminescence properties, but further development is restricted by their stability and the existence of toxic element lead. In this paper, F/Mn-doped CsPb ( Br / Cl ) 3 QDs glass was prepared by melt quenching and heat treatment, with reduced Pb content effectively. The result shows that the spectrum of the QD glass is adjustable between 450 nm and 515.4 nm by changing the feeding ratio of Mn-Pb ion and heat treatment temperature. Moreover, the indraught of Mn 2 + effectively improves the PLQY of CsPb ( Br / Cl ) 3 QDs glass and serves as a red-emitting. The prepared composites not only maintain good fluorescence characteristics, but also greatly improve the stability of QDs. And successfully coupled with blue LED chips to synthesize WLED, Under 20 mA current, the color coordinate is (0.3446, 0.3389).
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高影响因子
Journal of Experimental Nanoscience
·
2012
·
IF 1.011
Zhongping Chen
The precursors used to prepare high-quality nanoparticles by high-temperature decomposition are expensive and toxic organometallic compounds. Fe(OH)3, an inexpensive and environmentally friendly iron-containing compound, is for the first time introduced to act as an precursor to generate monodisperse iron oxide nanoparticles. The obtained nanoparticles are characterised by transmission electronic microscopy, IR, XRD and vibrating sample magnetometer. Organic-soluble ferromagnetic rod-like and superparamagnetic dot-like nanoparticles with the size ranging from 12 to 25 nm are obtained in a nonpolar solvent by adjusting reaction parameters, such as surfactant concentration and reaction time. Water-soluble nanoparticles can be synthesised when a bipolar solvent is used instead of nonpolar solvent. The results show that Fe(OH)3 is a promising precursor for the high-temperature decomposition method.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xiaoya Gao,Zhimin Li,Honglin Yan,Dongyan Zhang,Yuan Wang,Yuan Ha
Ni-rich layered LiNi 0.80 Co 0.15 Al 0.05 O 2 (NCA) cathode materials have attracted extensive attention in power lithium ion batteries on account of their high specific capacities and low voltage delay. However, they still suffer from inferior cycling stability, especially operating at a high cutoff voltage. In this paper, a surface modification strategy was proposed by utilizing Al(PO 3 ) 3 as a coating material to enhance the cycling performance of NCA in 2.7–4.6 V (vs. Li/Li + ). The surface modification effects of Al 3+ lattice doping and Al(PO 3 ) 3 coating were verified to be well achieved. In particular, besides the functions in stabilizing surface crystal structure of the NCA and isolating the erosion from electrolyte, the Al(PO 3 ) 3 coating could eliminate the residual lithium on the NCA surface to in-situ generate the Li 3 PO 3 which was conductive to the rate performance. Accordingly, the Al(PO 3 ) 3 -modified NCA cathode delivered excellent cycling performance, of which the initial discharge capacity was 235.9 mAh . g −1 at high cutoff voltage of 4.6 V, with a capacity retention of 71.6% after 100 cycles at 1 C. This work demonstrates the feasibility of surface modification on NCA via the phosphate coating with multiple functions, and provides an efficient approach to improve the cycling stability of Ni-rich layered cathode materials at higher cutoff voltage.
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高影响因子
IONICS
·
2016
·Vol. 23
·期 3
·575-583
·
IF 2.119
He Zhangxing,Jiang Yifan,Sun Dan,Dai Lei,Wang Haiyan
Inferior rate capability is a big challenge for LiTi 2 (PO 4 ) 3 anode for aqueous lithium-ion batteries. Herein, to address such issue, we synthesized a high-performance LiTi 2 (PO 4 ) 3 /carbon/carbon nanotube (LTP/C/CNT) composite by virtue of high-quality carbon coating and incorporation of good conductive network. The as-prepared LTP/C/CNT composite exhibits excellent rate performance with discharge capacity of 80.1 and 59.1 mAh g −1 at 10 C and 20 C (based on the mass of anode, 1 C = 150 mA g −1 ), much larger than that of the LTP/C composite (53.4 mAh g −1 at 10 C, and 31.7 mAh g −1 at 20 C). LTP/C/CNT also demonstrates outstanding cycling stability with capacity retention of 83.3 % after 1000 cycles at 5 C, superior to LTP/C without incorporation of CNTs (60.1 %). As verified, the excellent electrochemical performance of the LTP/C/CNT composite is attributed to the enhanced electrical conductivity, rapid charge transfer, and Li-ion diffusion because of the incorporation of CNTs.
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高影响因子
Nutrition & Food Science
·
2025
·
IF 1.6
Ye Yue,Huasong Bai,Tong Liu,Shang Jia,Xiaohong Kou,Zhanzhong Wang
Purpose This study aims to investigate the impact of the compositions and concentrations of α -linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are significant n-3 polyunsaturated fatty acids (n-3 PUFAs), on the anti-inflammatory properties of lipopolysaccharide (LPS)-stimulated mouse hepatocytes. Design/methodology/approach A mouse hepatocyte inflammation model was established using LPS to evaluate the anti-inflammatory effects of a combination therapy with EPA, ALA and DHA. Interleukin-10 (IL-10), lipoxin A4 (LXA4) and tumor necrosis factor-α(TNF- α ) were measured to evaluate the anti-inflammatory ability of hepatocytes. The compositions and concentrations of EPA, ALA and DHA were optimized by response surface methodology to obtain the best anti-inflammatory effect. Findings The optimal inflammatory model was established with 10 µg/mL LPS treatment for 24 h. Maximal cell viability was found at EPA concentration of 150 µM, ALA concentration of 400 µM and DHA concentration of 600 µM. The optimal concentrations of n-3 PUFAs for anti-inflammatory activity in mouse hepatocytes were obtained through single-factor experiments and response surface analysis, with EPA 141.41 µM, ALA 405.45 µM and DHA 551.76 µM. Under optimized conditions, the experimental results for TNF- α , IL-10 and LXA4 levels were close to the theoretical prediction, indicating that the mathematical model was extremely accurate and versatile. Originality/value This study systematically explored the specific effects of different ratios and concentrations of ALA, EPA and DHA on the anti-inflammatory ability of mouse hepatocytes, offering an experimental foundation for the advancement of novel anti-inflammatory medicines and nutritional supplements.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Mingwang Ren,Guoqing Sun,Xiaoyu Ding,Xiaolin Yu,Li He,Shiji Xiao,Minjian Dong,Jianwen Yang,Kan Ding,Chengxin Sun
Polysaccharides are among the key bioactive components of Gynostemma pentaphyllum (Thunb.) Makino . In this study, a novel polysaccharide fraction, GPPA1-1, was isolated from G. pentaphyllum and purified using DEAE-Sepharose Fast Flow, Sephadex G-75, and Sepharose CL-6B column chromatography. GPPA1-1 was determined to have a molecular weight of 3.7 × 10 4 Da and was composed of mannose (Man), glucuronic acid (GlcA), rhamnose (Rha), glucose (Glc), galactose (Gal), and arabinose (Ara) in a molar ratio of 3.88:3.97:21.77:7.02:45.65:17.71. Comprehensive structural characterization was conducted using Congo red staining, FT-IR spectroscopy, Methylation analysis, and NMR analysis. The backbone of GPPA1-1 was identified as comprising →4)-α-Gal p- (1→, →4)-α-Gal p- (3,1→, →2)-α-Rha p- (4,1→, and →2)-α-Rha p- (1→, with branch chains containing α-Ara f -(1→, →5)-α-Ara f -(1→, →3)-α-Galp-(1→, and -α-GlcA-(1→. Biological assays demonstrated that GPPA1-1 effectively alleviates insulin resistance by inhibiting Galectin-3. This activity was confirmed through various experiments, including Galectin-3-mediated hemagglutination, Western blotting, CETSA, and glucose uptake assays. These findings highlight the potential of GPPA1-1 as a promising therapeutic agent for managing insulin resistance.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Bangqian Wang,Jianjun He,Congcong Zhu,Bangcai Huang,Haijun Chen,Shan Guo,Fuzhong Wu,Guanghui Liu,Yong Deng,Xinyi Dai
The monoclinic Li 3 V 2 (PO 4 ) 3 cathode demonstrates significant promise for high-performance lithium-ion batteries (LIBs) technologies, primarily due to its outstanding energy density and enhanced safety performance. However, its practical application was hindered by inherent limitations, particularly, intrinsically restricted electron mobility and pronounced capacity fading during cycling at voltages exceeding 4.6 V. To overcome these challenges, this study employs a facile sol-gel method to synthesize carbon-coated Li 3 V 2 (PO 4 ) 3 materials while introducing In 3+ substitution for partial V 3+ sites. Electrochemical evaluations substantiate that the optimal In 3+ doping level of Li 3 V 2 (PO 4 ) 3 (LVP/C-In0.09) exhibits significantly enhanced performance. Specifically, the LVP/C-In0.09 sample delivers remarkable capability, sustaining 131.4 mAh g −1 at 10 C while maintaining 88.4 % of initial capacity after 500 cycles, surpassing the undoped LVP/C sample (initial capacity: 106.5 mAh g −1 ; retention: 75.7 %). XRD analysis indicates that incorporating In 3+ effectively broadens Li + diffusion channels. XAFS characterization reveals that the unit cell expansion is attributed to an increased V-V interatomic distance. Additionally, the controlled In 3+ doping effectively decreases the electrochemical resistance while substantially improving Li + diffusion kinetics. This study proposes a potential strategy to boost the practical application of Li 3 V 2 (PO 4 ) 3 in LIBs.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yao Yu,Zhifeng Zhang,Yijun Cao,Wei Sun,Zhiyong Gao,Haisheng Han,Pan Chen,Jian Cao
To improve the separation of ilmenite from its associated gangue mineral titanaugite through selective flotation, a novel hydroxamic acid derivative, N-hydroxy-3-(4-methoxyphenyl) acrylamide (HMPA), was successfully synthesized and evaluated as an efficient collector. Comparative flotation tests demonstrated that HMPA outperformed conventional sodium oleate, achieving superior separation efficiency with a TiO 2 concentrate grade of 48.95 % and an impressive recovery rate of 76.0 %. To understand the underlying mechanisms, the interactions between HMPA and the mineral surfaces were investigated meticulously by adsorption capacity tests, contact angle analysis, FTIR, and XPS. The results of contact angle and adsorption measurements intuitively revealed that HMPA exhibited significantly greater adsorption capacity on the ilmenite surface compared to titanaugite. FTIR and XPS analyses indicated that HMPA adsorbed strongly onto the ilmenite surface through chelation with reactive Ti and Fe sites. Density functional theory (DFT) calculations further suggested that HMPA could act as a bidentate ligand, forming a stable five-membered chelate structure through interactions with the Ti and Fe active sites on the ilmenite surface. In conclusion, HMPA demonstrated outstanding collecting ability and selectivity, making it a highly promising collector for ilmenite flotation.
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高影响因子
危险品化学品经营许可证（带存储）