ADVANCED MATERIALS
·
2025
·
IF 26.8
Rubing Bai,Peihao Huo,Nanlong Zheng,Yujia Li,Wenchao Yan,Peiyu Fang,Xiaoyu Zhou,Zuqiang Bian,Zhiwei Liu
Light-emitting electrochemical cells (LECs) have good prospects in the solid-state lighting field due to their simple single-layer structure and low manufacturing cost. However, the lack of high-efficiency blue LECs limits their development and further application. To solve this problem, many luminescent materials with various mechanisms such as fluorescence, phosphorescence, and thermally-activated delayed fluorescence are studied as emitters in LECs. Besides these materials, herein lanthanide europium(II) (Eu(II)) complex with d-f transition is demonstrated as a new type of emitter for LECs. In detail, a blue emitting Eu(II) complex bis[hydrotris(3-tert-butylpyrazolyl)borate]europium(II) is dispersed into 9-(3-(triphenylsilyl)phenyl)-9H-3,9′-bicarbazole host and tetrahexylammonium tetrafluoroborate electrolyte to make a blend film, which attains a high photoluminescence quantum yield of ≈100%. The LEC using the blend film as an active layer achieves a blue emission with Commission Internationale de L'Eclairage coordinates of (0.12, 0.18) and a record-breaking external quantum efficiency of 19.8%, corresponding to an exciton utilization efficiency of ≈100%. This work reveals that Eu(II) complex with d-f transition is a promising emitter toward high-performance blue LECs, which can inspire further research on Eu(II) complex based LECs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Yu Zhang,Zeyuan Li,Shuxin Wei,Changsheng Xu,Minhua Chen,Jierong Sang,Yiru Han,Huang Yan,Zhoukun Li,Zhongli Cui,Xianfeng Ye
Researchers often consider microorganisms from Stenotrophomonas sp. to be beneficial for plants. In this study, the biocidal effects and action mechanisms of volatile organic compounds (VOCs) produced by Stenotrophomonas sp. NAU1697 were investigated. The mycelial growth and spore germination of Fusarium oxysporum f. sp. cucumerinum (FOC), which is a pathogen responsible for cucumber wilt disease, were significantly inhibited by VOCs emitted from NAU1697. Among the VOCs, 33 were identified, 11 of which were investigated for their antifungal properties. Among the tested compounds, 2-ethylhexanol exhibited the highest antifungal activity toward FOC, with a minimum inhibitory volume (MIV) of 3.0 μL/plate (equal to 35.7 mg/L). Damage to the hyphal cell wall and cell membrane integrity caused a decrease in the ergosterol content and a burst of reactive oxygen species (ROS) after 2-ethylhexanol treatment. DNA damage, which is indicative of apoptosis-like cell death, was monitored in 2-ethylhexanol-treated FOC cells by using micro-FTIR analysis. Furthermore, the activities of mitochondrial dehydrogenases and mitochondrial respiratory chain complex III in 2-ethylhexanol-treated FOC cells were significantly decreased. The transcription levels of genes associated with redox reactions and the cell wall integrity (CWI) pathway were significantly upregulated, thus indicating that stress was caused by 2-ethylhexanol. The findings of this research provide a new avenue for the sustainable management of soil-borne plant fungal diseases.
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Yabo Shi,Min Liu,Hui Yan,Chang Cai,Qingying Guo,Wenxin Pei,Ruiyan Zhang,Zhengping Wang,Jun Han
The individual and combined interactions of bisphenol F and piceatannol with pepsin were investigated using spectroscopic methods (fluorescence, UV–vis absorption, and circular dichroism spectroscopy), combined with isothermal titration calorimetry and molecular docking. Thermodynamic data showed that hydrogen bonds and van der Waals forces might play a major role for the binding process. Site marking experiments and molecular docking confirmed the binding sites of these two ligands on pepsin. The discrepancy in the binding constant between the binary and ternary systems indicated the competitive binding of piceatannol and bisphenol F to pepsin. Circular dichroism spectra studies suggested that the binding of the two ligands led to a loosening of pepsin backbone. Enzyme activity assays indicated that the inhibition of pepsin activity by piceatannol and bisphenol F was competitive. These results will be helpful to understand the mechanism of piceatannol and bisphenol F affecting the activity of digestive proteases in the sight of the food security.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2024
·Vol. 71
·期 10
·6417-6423
·
IF 2.9
Peng Yang,Yudong Pang,Jiajia Zha,Haoxin Huang,Zhendong Jiang,Meng Zhang,Chaoliang Tan,Wugang Liao
This article utilizes low-frequency noise (LFN) measurements to evaluate the stability of tellurium (Te) field-effect transistor (FET). Our results show that LFN for Te FET on hexagonal boron nitride/silicon dioxide (h-BN/SiO2) tracks the trends of flicker noise (1/f noise) and decreases with increasing overdrive voltages, which is ascribed to the change of dominant carriers and the fluctuation of surface trap density. Compared with Te FET on SiO2, Te FET on h-BN/SiO2 reaches a lower LFN. To further investigate the mechanism of current fluctuation, surface trap density ( ${N} _{\text {st}}$ ) is extracted. The average value of ${N} _{\text {st}}$ for Te FETs on h-BN/SiO2 is smaller than that for Te FETs on SiO2. It is concluded that the introduction of atomically flat h-BN dielectric decreases ${N} _{\text {st}}$ , suggesting that Te FET on h-BN/SiO2 presents higher immunity to LFN and provides a design thought for devices with high stability in the future.
研究领域:
半导体器件物理
·
微电子学
·
凝聚态物理
·
材料科学
·
纳米电子学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 22
·15192-15202
·
IF 3.906
Jinggao Wu,Maowen Xu,Chun Tang,Guannan Li,Hong He,Chang Ming Li
F-Doping effects on polyaniline-derived carbon coated Li3V2(PO4)3 (Li3V2(PO4)3−xFx@C) as a cathode for high performance Li rechargeable batteries are systematically investigated with a combined experimental and DFT theoretical calculation approach. The results clearly indicate that the doping amount has a significant impact on the rate capability and long cycle life. The optimal material (Li3V2(PO4)2.88F0.12@C) delivers 123.16 mA h g−1@2C, which is close to the theoretical value (133 mA h g−1), while showing a greatly improved cycle stability. Rietveld refinements show that the F− doping does not obey Vegard's Law, which may be attributed to the generated lower valence of V ions. AC impedance spectroscopy shows that the F-doping can achieve faster interfacial charge transfer for higher reaction reversibility. DFT calculations confirm that the lower V2+ (t2g↑)3 does exist in Li3V2(PO4)2.88F0.12, and the mean nearest neighbor Li–O bond length also increases for faster electrochemical kinetics, and further reveal that there is a tendency for a transition from the insulator to the n-type semiconductor due to the F dopant. The combined experimental and calculated results suggest that F-doping indeed greatly facilitates the charge transfer rate of the Li+ insertion/de-insertion process for better reversibility and enhances the Li+ diffusion rate to access the reaction sites, thus resulting in high rate capacity and cycling stability. This work not only offers a facile and effective approach to synthesize high performance Li-ion battery material for very promising practical applications, but also discloses scientific insights on element coating and doping to guide the electrode material design for fast electrode kinetics in energy storage devices.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2014
·Vol. 44
·期 1
·237-246
·
IF 4.097
Ying Liu,Lining Sun,Jinliang Liu,Yu-Xin Peng,Xiaoqian Ge,Liyi Shi,Wei Huang
A novel mesoporous nanosphere functionalized with 3-(aminopropyl)triethoxysilane (APTES) and 2-(5-bromothiophen)imidazo[4,5-f][1,10]phenanthroline (5-Br-Tip) was synthesized (denoted as Tip-MSS). With the coordinating function of the 5-Br-Tip to lanthanide (Ln) ions, for the first time, LnL3(5-Br-Tip) complexes were linked to the mesoporous nanospheres. The derived materials, named Ln-Tip-MSS (Ln = Eu, Tb, Sm, Nd, Yb), were characterized by Fourier-transform infrared (FT-IR) spectroscopy, TEM, XRD (wide-angle and small-angle), N2 adsorption/desorption analysis, and fluorescence spectroscopy. Upon excitation in the ligand absorption, the Ln-Tip-MSS nanomaterials show characteristic visible (Eu, Tb, Sm) and NIR (Sm, Nd, Yb) luminescence (multicolor emission covered from 450 nm to 1400 nm spectral region). Of importance is that, with low cytotoxicity and good biocompatibility given by the methyl thiazolyl tetrazolium (MTT) assay, the Eu-Tip-MSS was successfully applied to cell imaging in vitro based on the Eu3+ luminescence (under 405 nm excitation).
研究领域:
纳米医学
·
生物成像
·
材料科学
·
分子探针
·
化学生物学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Qingsong Liu,Yan Zhu,Wentao Li,Junci Wu,Yi Zhang,Shouchun Ma,Chuanli Qin
Modified graphitic carbon nitride (MCN) was synthesized via calcinating β-alanine introduced melamine supramolecular precursors and poly(3-methylthiophene-co-fluorene) (P(3MT-co-F)) with improved planarity was prepared by polymerization of 3-methylthiophene (3MT) and fluorene (F) monomers. P(3MT-co-F)/MCN heterojunction was constructed by electrostatic self-assembly and the optimal 3P(3MT 1 -co-F 1 )/MCN exhibits excellent H 2 production performance of 11108 μmol h −1 g −1 under visible light, 150 times higher than MCN. The enhancement is attributed to the following aspects: First, F monomer as a rigid unit can regulate the main-chain torsion of P(3MT-co-F), enhancing planarity and facilitating intramolecular charge transport within copolymer. Second, N⋯S interactions and π-π stacking interactions at heterojunction interface improve the charge transfer and separation. Third, the incorporation of P(3MT-co-F) with narrow band gap into MCN not only broadens visible light absorption range and enhances visible light response, but also forms a Z-scheme heterojunction with MCN, further enhancing the charge separation and retaining the electrons with strong reducibility.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yu Hao,Dongfang Chen,Dongyi Pu,Song Hu,Pavese Doague Nguela,Pucheng Pei,Xiaoming Xu
The development of efficient and durable hydrogen evolution reaction (HER) electrocatalysts is critical for sustainable energy conversion. Although platinum (Pt) serves as a benchmark HER catalyst, its practical application is hindered by the high cost, limited durability, and susceptibility to CO poisoning. In this work, we report a heterojunction Pt-based catalyst, Pt@NCL-MXene, synthesized by LiF etching of MXene and subsequent NH3 calcination. This process introduces dual nitrogen (N) and fluorine (F) doping and yields a nitrogen-doped carbon layer (NCL) coating on Pt nanoparticles with an average size of only 3.4 nm. Compared with conventional Pt–C catalysts, Pt@NCL-MXene exhibits a larger specific surface area, enhanced electron transfer efficiency, and an optimized d-band center, thereby facilitating both H* adsorption and desorption. As a result, Pt@NCL-MXene achieves a significantly lower overpotential of 73 mV at a current density of 100 mA cm–2, alongside improved kinetics and stability under operational conditions. Furthermore, the 9 wt % F-rich MXene support effectively suppresses CO adsorption on Pt, reducing the CO uptake to 0.224 mmol g–1, which is purportedly lower than that of Pt–C (0.264 mmol g–1), thereby mitigating CO poisoning and prolonging the catalyst’s service life. These findings offer insights into the rational design of advanced CO-resistant Pt-based HER electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Honglin Qin,Yuan Tao,Ruiting Niu,Bingyan Han,Lizhen Qiao
In this work, magnetic flower-like and fluorine-doped nickel oxide composites Fe 3 O 4 @SiO 2 @F/NiO were prepared and applied for the magnetic solid-phase extraction (MSPE) of five imidazole fungicides. The obtained materials were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller analysis to verify the successful synthesis. The effect of some experimental parameters on the extraction efficiency were explored to optimize the MSPE conditions, including the adsorbent dosage, ultrasonic time, salt concentration, sample solution pH, elution solvent type and volume. Then, method validation was performed under the optimal conditions in combination with high-performance liquid chromatography-ultraviolet detection. The determination coefficients ranged from 0.9956 to 0.9991, and the limits of detection and limits of quantification for the imidazole fungicides were 0.1–3 μg·L −1 and 0.3–10 μg·L −1 , respectively. Moreover, the intra-day and inter-day precisions were evaluated in three different concentrations with relative standard deviations in the range of 1.34 %-13.31 % and 4.96 %-13.92 %. At last, the proposed MSPE method was used to enrich and determine imidazole fungicides in tap water, milk and green tea samples, and the spiked recoveries were in the range of 77.93 %-119.38 %, demonstrating the potential of the method in the determination of imidazole fungicides from real samples.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Yufei Liu,Siyuan Jiang,Wei Yan,Jun Qin,Min He,Shuhao Qin,Jie Yu
Improving complexation at the interfaces and regulating the crystal transformation behaviors of polyamide 6 (PA6) composites with high mechanical and thermal properties are essential for the industrial applications of PA6. In this work, the effects of adding p (N-(4-F-phenylmaleimide)-alt-styrene) (PFS) on the crystal transformation, thermostability, thermal conductivity , and mechanical properties of PA6 were investigated and discussed systematically. The resu---lts from heat deflection temperature (HDT), dynamic mechanical analysis (DMA ) and thermal conductivity tests indicate that PFS greatly increases the HDT, glass-transition temperature ( T g ), and thermal conductivity of PA6. Simultaneously, when the content of PFS is 10%, the tensile strength and flexural moduli of PA6/PFS composites are increased by 10.5 and 17.8% compared with that of pure PA6, respectively. The results from differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) show that PFS induces the transformation of PA6 from γ to α crystals by interfacial complexation. This work offers a facile approach for producing materials with high thermal and mechanical performances that can be potentially used in automobiles, electronics, and related technologies.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 38
·2302055
·
IF 13.3
Chaojie Lyu,Yanle Li,Jiarun Cheng,Yuquan Yang,Kaili Wu,Jiwen Wu,Huichao Wang,Woon-Ming Lau,Ziqi Tian,Ning Wang,Jinlong Zheng
Heteroatoms Fe, F co-doped NiO hollow spheres (Fe, F-NiO) are designed, which simultaneously integrate promoted thermodynamics by electronic structure modulation with boosted reaction kinetics by nano-architectonics. Benefiting from the electronic structure co-regulation of Ni sites by introducing Fe and F atoms in NiO , as the rate-determined step (RDS), the Gibbs free energy of OH* intermediates (Δ G OH* ) for Fe, F-NiO catalyst is significantly decreased to 1.87 eV for oxygen evolution reaction (OER) compared with pristine NiO (2.23 eV), which reduces the energy barrier and improves the reaction activity. Besides, densities of states (DOS) result verifies the bandgap of Fe, F-NiO(100) is significantly decreased compared with pristine NiO(100), which is beneficial to promote electrons transfer efficiency in electrochemical system. Profiting by the synergistic effect, the Fe, F-NiO hollow spheres only require the overpotential of 215 mV for OER at 10 mA cm −2 and extraordinary durability under alkaline condition. The assembled Fe, F-NiO || Fe-Ni 2 P system only needs 1.51 V to reach 10 mA cm −2 , also exhibits outstanding electrocatalytic durability for continuous operation. More importantly, replacing the sluggish OER by advanced sulfion oxidation reaction (SOR) not only can realize the energy saving H 2 production and toxic substances degradation, but also bring additional economic benefits.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2023
·
IF 6.1
Jingyu Li,Miao Liu,Jiaxuan Li,Xianhua Liu
The establishment of simple and sensitive detection methods for fluoride ion (F − ) is of great importance for its effective prevention and control, and metal-organic framework (MOF) has attracted much attention for sensing applications due to its high surface areas and tunable structures. Herein, we successfully synthesized a fluorescent probe for ratiometric sensing of F − by encapsulating sensitized Tb 3+ in a MOF-on-MOF material (UIO66/MOF801, with the formula of C 48 H 28 O 32 Zr 6 and C 24 H 2 O 32 Zr 6 , respectively). We found that Tb 3+ @UIO66/MOF801 can be used as a built-in fluorescent probe for fluorescence-enhanced sensing of F − . Interestingly, the two fluorescence emission peaks of Tb 3+ @UIO66/MOF801 at 375 nm and 544 nm exhibit different fluorescence responses to F − under excitation at 300 nm. The 544 nm peak is sensitive to F − , while the 375 nm peak is insensitive to it. Photophysical analysis indicated that the photosensitive substance was formed, which promotes the absorption of 300 nm excitation light by the system. Self-calibrating fluorescent detection of F − was achieved due to the unequal energy transfer toward the two different emission centers. The detection limit of Tb 3+ @UIO66/MOF801 for F − was 4.029 μM, which is far lower than the WHO guideline for drinking water . Moreover, the ratiometric fluorescence strategy showed a high concentration tolerance of interference, because of its inner-reference effect. This work highlights the high potential of lanthanide ion encapsulated MOF-on-MOF as environmental sensors, and offers a scalable way for construction of the ratiometric fluorescence sensing systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）