Reaction Chemistry & Engineering
·
2024
·
IF 3.4
Zhiwei Huang,Yaxin Yuan,Xinyi Li,Yiyang Li,Min Wang,Zhuqing Wang
E-waste contains a variety of non-renewable precious metal resources, and the amount is significantly higher than the abundance of precious metals in the corresponding ores. Therefore, it is of great significance to recover and reuse precious metals in e-waste. In this study, we successively used a simple one-step oxidation method and physical cross-linking to prepare a poly-m-phenylenediamine composite membrane material (CMC–PmPD composite membrane) containing a large number of recycling groups. The prepared CMC–PmPD composite membrane has high adsorption capacity and adsorption efficiency for Au(III), and the maximum adsorption capacity for Au(III) reaches 421.1 mg g−1. The adsorption follows a second-order kinetic process and a Langmuir isotherm model, indicating that the adsorption mechanism is a monolayer chemisorption. The regeneration of the composite membrane material can be realized after a simple thiourea solution immersion, and 89.5% adsorption efficiency is maintained after five regeneration cycles. In addition, when the CMC–PmPD composite membrane was applied to the treatment of mixed heavy metal ion solutions with different concentrations and compositions, the CMC–PmPD composite membrane was always able to selectively adsorb more than 95% of Au(III) from the simulated solution or e-waste leachate, which was highly selective and applicable. The CMC–PmPD composite membrane has a broad application prospect in metallurgy and fine chemical industry.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Fang Cao,Xu Chang,Zhang Wei,Zhou Meng,Tan Dong,Qian Lixia,Hu Daqiao,Jin Shan,Zhu Manzhou
Dual emission (DE) in nanoclusters (NCs) is considerably significant in the research and application of ratiometric sensing, bioimaging, and novel optoelectronic devices. Exploring the DE mechanism in open-shell NCs with doublet or quartet emissions remains challenging because synthesizing open-shell NCs is difficult due to their inherent instability. Here, we synthesize two dual-emissive M 1 Ag 13 (PFBT) 6 (TPP) 7 (M = Pt, Pd; PFBT = pentafluorobenzenethiol; TPP = triphenylphosphine) NCs with a 7-electron open-shell configuration to reveal the DE mechanism. Both NCs comprise a crown-like M 1 Ag 11 kernel with Pt or Pd in the center surrounded by five PPh 3 ligands and two Ag(SR) 3 (PPh 3 ) motifs. The combined experimental and theoretical studies revealed the origin of DE in Pt 1 Ag 13 and Pd 1 Ag 13 . Specifically, the high-energy visible emission and the low-energy near-infrared emission arise from two distinct quartet excited states: the core-shell charge transfer and core-based states, respectively. Moreover, PFBT ligands are found to play an important role in the existence of DE, as its low-lying π * levels result in energetically accessible core-shell transitions. This novel report on the dual-quartet phosphorescent emission in NCs with an open-shell electronic configuration advances insights into the origin of dual-emissive NCs and promotes their potential application in magnetoluminescence and novel optoelectronic devices.
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高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Dilare Halmurat,Xinyu Zhang,Litipu Aihaiti,Rong-Jun Xie
Eu 2+ -doped phosphors show broadband absorption, tunable emission and high quantum efficiency due to the parity-allowed 5d→4f transitions, allowing them to be used in solid-state lighting. To expand their applications in other fields such as detection and sensing technologies, the Eu 2+ emission needs to be tuned into the near-infrared region, but it is a big challenge to obtain Eu 2+ near-infrared region emitters due to the absence of host compounds with extremely large crystal-field splitting. In this work, we chose M 4 Li(BN 2 ) 3 (M = Ca, Sr, Ba) as a host and realize the near-infrared region emission of Eu 2+ in it. Among these phosphors, Ba 4 Li(BN 2 ) 3 :Eu 2+ exhibits the longest emission of 880 nm and the largest full-width at half maximum of 276 nm under 450 nm excitation, while Ca 4 Li(BN 2 ) 3 :Eu 2+ and Sr 4 Li(BN 2 ) 3 :Eu 2+ emit at 740 and 680 nm, respectively. We observe an interesting phenomenon that the energy shift of emission is linearly related to the radius difference between the alkaline earth cation and the activator Eu 2+ in this system.
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BIOORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hongyan Lin,Shuaijun Cui,Xinye Xu,Qingqing Chen,Jiazi Ge,Dongxuan Ai,Jie Zhu,Yuheng Tao,Liqun Wang,Lingyu Ruan,Wenhao Ge
18β-Glycyrrhetinic acid (18β-GA) is the main active component of licorice and one of the most promising lead compounds in traditional Chinese herbal medicine. Previous studies have shown that 18β-GA can act as a PPARγ agonist to exert antitumor activity. However, the number of reported 18β-GA derivatives as PPARγ agonists is limited and they have significant toxic side effects, which greatly restricts their application and development. To obtain highly effective and low-toxic PPARγ agonists, through structure-activity relationship (SAR) analysis, we constructed a molecular library of 18β-GA derivatives containing 13,440 compounds and screened out 14 novel 18β-GA ester derivatives. The selected compounds were evaluated for their antitumor activity in vitro. The results showed that most of the compounds exhibited strong anti-proliferative activity against five human cancer cell lines, especially the human colon cancer cell line HT-29, without significant toxicity to normal cell lines. Among them, C1 had the strongest anti-proliferative activity against HT-29, with an IC 50 value of 12.25 μM, which was 12 times higher than that of its parent nucleus 18β-GA. C1 can block the cell cycle of HT-29 cells in G2/M phase, significantly inhibit their migration and induce their apoptosis. Molecular docking and dynamics simulation results suggested that C1 could stably bind to the active pocket of PPARγ. Further PPARγ activity analysis and drug-likeness prediction results indicated that C1 could act as a PPARγ agonist to exert antitumor effects and had certain drug-likeness, which is worthy of further study.
研究领域:
药理学
·
药物化学
·
肿瘤学
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
·
IF 3.615
He Hao,Yue Chang,Wenjun Yu,Lan-Lan Lou,Shuangxi Liu
Novel hierarchical MCM-68 zeolite materials were successfully prepared by two simple, effective and environmentally friendly methods: H 2 O 2 microexplosion under microwave and NH 3 (aq) treatment. The characterization of the materials with powder XRD , SEM, TEM, N 2 -sorption, and NH 3 -TPD proved that abundant mesopores across zeolite crystals were created while the microporous MSE framework was well preserved. The mesopore volume of hierarchical MCM-68 zeolites is up to 0.19 cm 3 g −1 . The crystallinities of hierarchical ones and microporous MCM-68 are nearly the same according to the XRD result. The acidities of hierarchical MCM-68 are generally lower than their raw materials. Gas-phase isomerization reaction of m -xylene was carried out over these hierarchical MCM-68 zeolites as well as HMCM-68 zeolite under different conditions to characterize the catalytic property of newly prepared hierarchical zeolites. It was found that the m -xylene conversion and disproportionation/isomerization rate ratio were closely related to the created mesopores in hierarchical MCM-68 zeolites under high reaction temperature and low weight hourly space velocity (WHSV). Moreover, these hierarchical MCM-68 zeolites exhibited improved resistance to coke formation compared with HMCM-68.
研究领域:
化学工程
·
材料科学
·
催化反应工程
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Tong Wu,Lei Kang,Fan Liu,Ruixin Guo,Shu Guo,Tianhong Huang,Shuangyue Shang,Lijuan Liu,Xiaoyang Wang
Cation regulation is a compelling strategy for developing new compounds with optimized crystal structure by atomic-scale manipulation. Herein, we report two new SBBO-like fluoroberyllium borates, SrMgBe₂(BO₃)₂F₂ (SMBBF) and SrZnBe₂(BO₃)₂F₂ (SZBBF). They crystallize in a trigonal system and feature a [Be₃B₃O₆F₃]∞ single layer stabilized by the incorporation of Mg²⁺/Zn²⁺ cations and F⁻ cations. Both compounds exhibit deep-UV absorption edges below 200 nm. Theoretical calculations confirm their potential as deep-UV birefringent materials, with correspinding birefringence values of 0.064 (SMBBF) and 0.063 (SZBBF) at 589 nm, respectively. This work demonstrates the effectiveness of cation regulation in designing novel borate-based optical materials.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2015
·
IF 2.679
Hui-Hui Zhang,Na Kong,Jie Wang,Zhi-Hong Liu
Two pure microporous copper borates (NaCuB 7 O 12 · H 2 O and KCuB 7 O 12 · H 2 O) have been synthesised and characterized by XRD, FT-IR, TG techniques and chemical analysis. The molar enthalpies of solution of NaCuB 7 O 12 · H 2 O (s) and KCuB 7 O 12 · H 2 O (s) in 1 mol · dm −3 HCl (aq) were determined to be – (24.12 ± 0.12) kJ · mol −1 and – (35.07 ± 0.08) kJ · mol −1 , respectively. The molar enthalpies of solution of 0.72 mg of NaCl (s) and 0.91 mg of KCl in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 were measured, respectively. The molar enthalpies of solution of 2.09 mg of CuCl 2 · 2H 2 O (s) in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 and 0.72 mg of NaCl/0.91 mg of KCl were also measured, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol · dm −3 HCl (aq), together with the standard molar enthalpies of formation for CuCl 2 · 2H 2 O (s), NaCl (s)/KCl (s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of – (5373.3 ± 5.6) kJ · mol −1 for NaCuB 7 O 12 · H 2 O (s) and – (5375.0 ± 5.6) kJ · mol −1 for KCuB 7 O 12 · H 2 O (s) at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycles. It is obvious that KCuB 7 O 12 · H 2 O (s) is more thermal stable than that of NaCuB 7 O 12 · H 2 O (s).
研究领域:
化学热力学
·
材料科学
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RSC Advances
·
2016
·Vol. 6
·期 38
·32176-32182
·
IF 3.289
Fan Yang,Xingfeng Shi,Zhang Chen,Dongyun Ma,Yupeng Wu,Hongjie Luo,Yanfeng Gao
Thermochromic (TC) and electrochromic (EC) smart windows are the mostly studied categories of smart window, but they usually work in different wavebands, and each have their own advantages. This work offers a method to combine the advantages of TC and EC smart windows by synthesizing TC–EC dual-response TiO2–VO2 nanocomposite films. These films were prepared by dispersing VO2 nanoparticles (NPs) in TiO2 sols and then underwent annealing. The optimized film showed a luminous transmittance (Tlum) of 66.1% at 20 °C, 59.3% at 90 °C and a ΔTsol of 11.2%. By applying a voltage of −5 V, the film showed an EC transmittance modulation (ΔT) of 19.1% at 630 nm, a combined performance of Tlum = 44.7% and ΔTsol = 17.1% (increased by 52%). The color of the films could also be modified from a yellowish brown to a light blue, which is meaningful for practical usage. The current TiO2–VO2 nanocomposite film combines TC and EC performance, which may be an important breakthrough in energy saving smart windows.
研究领域:
材料科学
·
能源技术
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高影响因子
iScience
·
2023
·
IF 5.8
Jibin Wu,Rui Deng,Jianling Yan,Baokang Zhu,Jian Wang,Yinghua Xu,Shuiqing Gui,Xiaobao Jin,Xuemei Lu
Hepatocellular carcinoma (HCC) is a prevalent malignant tumor, with a growing incidence and death rate worldwide. The aims and challenges of treating HCC include targeting the tumor, entering the tumor tissue, inhibiting the spread and growth of tumor cells. M27-39 is a small peptide isolated from the antimicrobial peptide Musca domestica cecropin (MDC), whereas HTPP is a liver-targeting, cell-penetrating peptide obtained from the circumsporozoite protein (CSP) of Plasmodium parasites. In this study, M27-39 was modified by HTPP to form M(27-39)-HTPP, which targeted tumor penetration to treat HCC. Here, we revealed that M(27-39)-HTPP had a good ability to target and penetrate the tumor, effectively limit the proliferation, migration, and invasion, and induce the apoptosis in HCC. Notably, M(27-39)-HTPP demonstrated good biosecurity when administered at therapeutic doses. Accordingly, M(27-39)-HTPP could be used as a new, safe, and efficient therapeutic peptide for HCC.
研究领域:
肿瘤学
·
药理学
·
分子生物学
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高影响因子
Molecular Medicine Reports
·
2017
·Vol. 16
·期 2
·2069-2074
·
IF 1.692
Huijun Liu,Weiwei Liu,Xin Zhou,Chongde Long,Xielan Kuang,Jie Hu,Yan Tang,Lanying Liu,Jia He,Zixin Huang,Yuting Fan,Guorong Jin,Qingjiong Zhang,Huangxuan Shen
Oxidative damage is a key factor for the pathogenesis of age‑related macular degeneration (AMD), therefore, anti-oxidative stress is a valuable method for the prevention or treatment of AMD. The aim of the present study was to reveal the protective mechanism of lutein on retinal pigment epithelium (RPE) cells subjected to oxidative stress. Acute retinal pigment epithelial 19 (ARPE‑19) cells were exposed to oxidative stress induced by H2O2 following lutein pretreatment. The activities of caspases, level of intracellular reactive oxygen species (ROS) and cell cycle were analyzed using flow cytometry. The expression levels of cell cycle regulatory proteins and inflammation‑associated genes were detected using western blot and reverse transcription‑polymerase chain reaction analyses, respectively. The data showed that oxidative stress reduced cell viability, and increased total apoptosis and ROS generation, however, lutein prevented cells from oxidative stress‑induced damage. In addition, oxidative damage triggered G2/M phase arrest of the ARPE‑19 cells, which was reversed by lutein in a concentration‑dependent manner, through the activation of cyclin‑dependent kinase 1 and cell division cycle 25C, and degradation of cyclin B1. These results demonstrated that lutein may be an effective antioxidant, which can be applied in the prevention of AMD, or other age-related diseases associated with oxidative damage.
研究领域:
眼科学
·
细胞生物学
·
分子生物学
·
药理学
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Junwei Ding,Jiaqi Han,Dongfang Ji,Lifeng Han,Kang Zhao,Hewei Luo,Shide Wu,Shiwen Wang,Shaoming Fang
Aqueous zinc-iodine batteries (AZIBs) have broad application prospects in large-scale energy storage due to their intrinsic safety, high energy/power density, and low cost. However, the iodine cathode still faces challenges such as shuttle effect and slow conversion kinetics. Herein, the tungsten-regulated metal-phase vanadium dioxide (W-VO 2 (M)) is proposed to improve the whole performance of AZIBs. First, a heat-treatment method is applied to achieve the phase transition to prepare W-VO 2 (M) from the precursor of the tungsten introduced B-phase vanadium dioxide. Via various characterizations, the successful tungsten introducing is confirmed by occupying the vanadium position and forming the tungsten-oxygen bond in the VO 2 (M) lattice. The obtained W-VO 2 (M) is used as the functional separator modifier of AZIBs, which deliver high capacity, superior rate performance, and long-cycling stability. Specifically, the capacity is 133.8 mAh g −1 after 500 cycles at 1 C. When at 3, 5, 7, 10 C, the corresponding capacities are 127.6, 115.9, 106.5, and 95.5 mAh g −1 , respectively. The battery can stably work 5000 cycles at 10 C. A series of analyses suggest that the W-VO 2 (M) can inhibit shuttle effect and accelerate the iodine conversion kinetics via the adsorbing and anchoring of iodine species. This research provides a new perspective for advanced AZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2025
·
IF 2
Xuekai Shan,Didi Lu,Peihang Wang,Zhuqiu Sun,Bairen Yang
Selenium(IV) (Se(IV)) supplementation was evaluated as a biostimulant to enhance m-dichlorobenzene (m-DCB) biodegradation in laboratory-scale biotrickling filters (BTFs) inoculated with Brevibacillus agri DH-1. An optimal Se(IV) concentration of 4.0 mg/L increased steady-state m-DCB removal efficiency from 74.38% to 81.74% at an empty bed residence time (EBRT) of 90 s. When the EBRT was reduced to 30 s, BTF2 maintained a 41.74% removal efficiency, compared with only 17.64% for BTF1. Se(IV) promoted extracellular polymeric substance production, strengthened biofilm adhesion, enhanced catechol-1,2- and catechol-2,3-dioxygenase activities, and moderated surface charge to favour microbial aggregation. Fourier-transform infrared spectroscopy confirmed Se(IV)-facilitated dechlorination and aromatic-ring cleavage, while 16S rRNA sequencing revealed enrichment of key degraders including Brevibacillus, Pseudomonas, Bacillus, Rhodanobacter, and Sphingobium. These findings demonstrate a novel micronutrient-based strategy to improve BTF performance for treating chlorinated aromatic exhaust gases.
研究领域:
环境工程
·
生物修复
·
微生物技术
·
空气污染控制
·
环境微生物学
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高影响因子
危险品化学品经营许可证（带存储）