JOURNAL OF NANOPARTICLE RESEARCH
·
2025
·Vol. 27
·期 2
·1-11
·
IF 2.6
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
In this work, the different shaped CoSn(OH) 6 nanocrystallines were prepared by hydrothermal method. The morphology, microstructure, and composition of the prepared nanocrystallines were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and other methods. The optical properties of CoSn(OH) 6 nanocrystallines with different morphologies were analyzed using UV–vis DRS. With the reduction of 4-nitrophenol as a model reaction, the photocatalytic performance of CoSn(OH) 6 nanocrystallines with the different morphologies was investigated. The results show that the CoSn(OH) 6 nanorings significantly improved the photocatalytic reduction 4-nitrophenol performance. The conversion rate of 4-nitrophenol reached 94% within 6 min. Finally, a potential mechanism for the photocatalytic process of CoSn(OH) 6 nanorings is discussed.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Yu He,Chenxi Zhao,Zecheng Lu,Ning Guo,Hongmei Luan,Yanchun Yang,Ruijian Liu,Chengjun Zhu
Indium tin oxide (ITO) and intrinsic ZnO (i-ZnO) are usually used as the window layer of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells within a typical structure. The optoelectronic properties of the window layer play a crucial role in determining the efficiency of solar cells. In this work, two types of CZTSSe solar cells with and without i-ZnO layers were fabricated using dimethyl sulfoxide (DMSO) and dimethylformamide (DMF) as solvents, respectively. The impact of the window layer on the performance of CZTSSe solar cells was investigated. The results suggest that the device without i-ZnO still exhibits a high power conversion efficiency (PCE) compared to conventional bilayer i-ZnO/ITO structures. By removing i-ZnO and optimizing the thickness of ITO, the highest power conversion efficiency (PCE) of DMSO and DMF-based CZTSSe solar cells has been up to 10.17% and 10.27%, respectively, with an increase in open-circuit voltage (V OC ) of 15 mV (in DMSO system) and 10 mV (in DMF system), as well as an enhancement in fill factor (FF) by ∼5 percentage points. These performance improvements are mainly attributed to the reduction of series resistance (R s ) of the window layer due to the removal of i-ZnO layer. Further analysis shows that the generation and collection of photon-generated carriers in CZTSSe solar cells can be affected by the optimized window layer due to optical interference effects and its resistance. Our research may provide insights for the preparation of high efficient CZTSSe solar cells with new structures of the i-ZnO free window layer.
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PLACENTA
·
2024
·
IF 3
Caiqun Huang
Introduction T oxoplasma gondii is an opportunistic intracellular parasite that is a major pathogenic factor in miscarriage, especially when it occurs early in pregnancy. We have previously demonstrated that the regulation of forkhead box transcription factor (Foxp3) is associated with abortion in early pregnancy caused by excretory-secretory antigen (ESA) of strain China 1. We aimed to reveal the underlying mechanism of miscarriage caused by ESA. Methods A TLR4 −/− pregnant mouse model was successfully constructed. Pregnant mice at gestational day 5 (G5) were injected with ESA. All animals were sacrificed on G13, pregnancy outcomes were observed, and abortion rates were calculated. Placental status observed by Hematoxylin-eosin staining; gene expression was measured by IHC; flow cytometry analysis was used to determine the number and function of regulatory T cells. In EL4 cells, real-time PCR and Western blot were used to evaluate gene expression and cytokines assay. Results In vivo studies revealed that ESA injection caused 83% abortion in pregnant mice but only 35% abortion in TLR4−/− pregnant mice. In addition, ESA attenuated the number and function of regulatory T cells, further suppressed Foxp3, FOXO1 levels, and upregulated CD127 expression. TLR4 −/− mice partially reversed this inhibitory effect on regulatory T cells. Furthermore, in vitro studies revealed that ESA inhibited TLR4/NF-κB signaling pathway expression and that TLR4 agonists significantly restored the ESA-induced decrease in Foxp3. Discussion These findings suggest that ESA suppresses Foxp3 expression by blocking TLR4/NF-κB signaling, resulting in miscarriage. More importantly, the results indicated that miscarriage caused by ESA is TLR4 dependent.
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GLIA
·
2025
·
IF 5.1
Tingting Yang,Zhenzhou Lin,Mingjia Yu,Yongchuan Li,Jiancong Chen,Yuanchi Liu,Kaibin Huang,Suyue Pan
Status epilepticus (SE) is a severe condition that results in uncontrollable cerebral edema and cognitive dysfunction. Recent studies suggest that the localization of aquaporin-4 (AQP4) in astrocytic endfeet plays a crucial role in regulating blood–brain water transport and cell volume control, particularly along perivascular pathways. However, the signaling mechanisms underlying AQP4 localization remain poorly understood. In this study, we utilized the genetically encoded fluorescent calcium (Ca 2+ ) indicator GCaMp6f to investigate Ca 2+ signals in astrocytic somata, processes, and endfeet during SE induction and observed enhanced Ca 2+ signals in both the somata and perivascular endfeet of astrocytes. We employed genetic knockout of TRPM4 ( Trpm4 −/− ) and glibenclamide treatment to explore the role of sulfonylurea receptor 1 transient receptor potential melastatin-4 (SUR1-TRPM4) channel in these Ca 2+ responses. Both approaches significantly suppressed the Ca 2+ signals in the astrocytic endfeet and reduced perivascular expression of the Ca 2+ -related signaling pathway sensor calmodulin (CaM). Furthermore, we found that AQP4 localization was no longer confined to the domains of astrocytic endfeet following SE. Inhibition of SUR1-TRPM4 through pharmacological blockade or gene deletion restored the subcellular localization of AQP4, reduced cerebral edema, and improved cognitive outcomes post-SE. Our findings suggest that SUR1-TRPM4 plays a pivotal role in regulating astrocytic Ca 2+ signals and mediating the aberrant expression and subcellular localization of astrocytic AQP4 along perivascular pathways. Together, these findings demonstrate a novel molecular mechanism underscoring SUR1-TRPM4 therapy in the treatment of SE characterized by dysregulated Ca 2+ signaling in astrocytic endfeet.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Min Zhou,Ruru Xiong,Xuanxuan Wang,Huishuang Li,Lijuan Wang,Guixia Ling,Peng Zhang
Hyperpigmentation (HP) is mainly triggered by ultraviolet irradiation or local inflammation, and the free radicals generated by these two factors are the core inducers of various skin diseases. This study proposes a multipathway and highly efficient treatment strategy for melanin deposition. A microneedle (MN) system based on hydrolyzed collagen (HC) and polyvinylpyrrolidone (PVP) was designed to precisely deliver Chlamydomonas reinhardtii (C. reinhardtii) and potassium 4-MSK (C.r&4-MSK-MN) to skin tissues. C. reinhardtii contains unique antioxidant components such as arsenoproteins, polyunsaturated fatty acids (PUFAs), and algal polysaccharides, which distinguish it from other microalgae like Chlorella. In vitro free radical scavenging experiments show that at a concentration of 1 × 109 cells/mL, C. reinhardtii exhibits scavenging rates of 89.26%, 101.44%, and 103.57% against DPPH·, ABTS·+, and ·OH radicals, respectively. In addition, potassium 4-methoxysalicylate (4-MSK) can inhibit tyrosinase activity and promote skin metabolism. Therefore, C.r&4-MSK-MN has the following advantages: on one hand, C.r&4-MSK-MN successfully breaks through the skin barrier, directly delivering C. reinhardtii cells to the target site to scavenge free radicals and reduce the stimuli for melanin production. On the other hand, 4-MSK inhibits tyrosinase activity to reduce melanin synthesis and, at the same time, promotes skin metabolism to reduce melanin deposition on the skin surface, achieving multipathway reduction of melanin deposition. Experimental results showed that in animal models, C.r&4-MSK-MN significantly reduces the epidermal thickness of rats and substantially decreases melanin production. This research outcome not only provides a new strategy for the treatment of melanin deposition but also confirms that microalgae have potential application prospects in the fields of skin care (such as whitening and antiaging) and cosmeceuticals.
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Materials Today Chemistry
·
2025
·
IF 6.7
Chenbo Xu,Jianing Zhang,Yuexiao Pan,Yangyang Liu,Xiaoyun Yang,Hongping Xiao,Jun Zou
The quest for advanced luminescent materials with high quantum yields and excellent stability is essential for the development of light-emitting diodes (LEDs). In this context, we present a novel zero-dimensional (0D) organic-inorganic hybrid metal halides (OIHMHs), (4-BTP) 2 ZnBr 4 :Mn 2+ , which exhibits dual emission characteristics. The material achieves a photoluminescence quantum yield (PLQY) of 87.6 % under 365 nm excitation, indicating its high radiative efficiency. Furthermore, it demonstrates remarkable water resistance, maintaining its photoluminescence (PL) performance after two months of immersion in water, and excellent thermal stability up to 325 °C. Importantly, the successful incorporation of Mn 2+ ions into the (4-BTP) 2 ZnBr 4 matrix allows for tunable emission from blue-violet to green, depending on the excitation wavelength and Mn 2+ concentration. A stable white light emission in LED with a color rendering index (CRI) of 88 and correlated color temperature (CCT) of 6757 K has been obtained with the phosphor (4-BTP) 2 ZnBr 4 :Mn 2+ . This work contributes to the fundamental understanding of energy transfer mechanisms in hybrid materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yulong Luo,Kerun Li,Wei Liu
The Advanced Oxidation Process (AOPs) has garnered significant attention as an efficient and promising technology for wastewater treatment in the field of environmental remediation. Currently, the exploration of highly effective catalysts for peroxymonosulfate (PMS) activation remains a focal point of scientific research, with increasing emphasis placed on the reuse of waste materials. In line with this objective, this study reports the synthesis of a Fe Co bimetallic metal-organic framework (MOF)-sponge composite (FCS) via an in-situ growth method using discarded natural sponge as a support material. Subsequently, the carbonized derivative (FCSC), obtained through high-temperature carbonization, was employed as a catalyst for PMS activation. The resulting catalyst demonstrated remarkable efficiency in removing 4-nitrophenol (4-NP) from aqueous solutions. Utilizing waste natural sponge as a support not only facilitates resource recovery but also enables the uniform distribution of MOF particles within its inherent three-dimensional porous structure. This feature enhances the contact between the catalyst and pollutants, thereby improving catalytic performance. Moreover, diatomic active sites exhibit significantly higher degradation efficiency toward 4-NP compared to the monometallic configurations. This enhanced performance can be attributed to the more rapid generation of free radicals by diatomic structures during PMS activation, which accelerates electron transfer between metal centers and adjacent oxygen atoms. This work offers novel insights into the development of efficient strategies for the removal of organic contaminants.
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JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Bo Luo,Wei Zhou,Xingai Zhang,Pei Zhao,Xiaoxiao Zhang,Longge Zhang,Hongyan Ding,Lailiang Qu
To promote the discovery and development of novel SDHIs fungicides, a series of novel pyrazole-4-carboxamides 4a-t and aromatic carboxamides 8a-i with a hydrazine scaffold were designed, synthesized, and evaluated for their antifungal activities. The results showed that compound 4i exhibited outstanding antifungal activity against R. solani with EC 50 value of 0.24 μg/mL, which was about three times more potent than that of Boscalid (EC 50 = 0.74 μg/mL). Moreover, compound 4i also displayed promising antifungal activities against Sclerotinia sclerotiorum, B. cinerea, Alternaria alternate , and F. graminearum (IC 50 = 1.21–4.50 μg/mL), indicating a broad spectrum of antifungal activities. Additionally, in vivo antifungal activities results showed that 4i could significantly inhibit the growth of R. solani in rice leaves with good protective efficacy (55.21%) and excellent curative efficacy (73.06%) at 100 μg/mL. The results of the SDH enzymatic inhibition assay showed that compound 4i generated significant SDH inhibition with IC 50 value of 6.47 μM, which was superior to Boscalid (IC 50 = 7.92 μM). Furthermore, SEM analysis showed that compound 4i could remarkably disrupt the typical structure and morphology of R. solani hyphae. The molecular docking study revealed that compound 4i could form H-bonds interactions and π-π interactions with TRP173 and TRY58 at the activity site of SDH, which was similar to that of Boscalid. The DFT calculation provided crucial information regarding electron transfer, which was essential in understanding the mechanism of molecules and target enzymes. These results indicated that compound 4i showed potential as a SDHIs fungicide and warranted further investigation.
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MOLECULES
·
2016
·Vol. 21
·期 3
·299
·
IF 2.465
Bo Jin,Rongzong Zheng,Rufang Peng,Shijin Chu
Five new bis(3-hydroxy-4-pyridinone) tetradentate chelators were synthesized in this study. The structures of these tetradentate chelators were characterized by1H-NMR,13C-NMR, FT-IR, UV-vis, and mass spectral analyses. The binding abilities of these tetradentate chelators for uranyl ion at pH 7.4 were also determined by UV spectrophotometry in aqueous media. Results showed that the efficiencies of these chelating agents are dependent on the linker length. Ligand4bis the best chelator and suitable for further studies.Keywords:chelating agent;3-hydroxy-4-pyridinone;uranium;tetradentate chelator
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RSC Advances
·
2014
·Vol. 4
·期 48
·25440-25446
·
IF 3.708
Yanlin Ren,Guangyin Fan,Weidong Jiang,Bin Xu,Fuan Liu
Magnetic palladium/reduced graphene oxide nanocomposites (Pd/rGO-Fe3O4) were prepared by depositing Pd nanoparticles on an rGO-Fe3O4 magnetic support. The as-prepared nanocomposites were investigated as catalysts for the hydrodechlorination of 4-chlorophenol in the aqueous phase. The complete conversion of 4-chlorophenol (with a concentration as high as 2.5 g L−1) to phenol was obtained in a reaction time of 40 min at room temperature and balloon hydrogen pressure without any additives. The excellent catalytic activity of the Pd/rGO-Fe3O4 can be attributed to the small particle size of Pd, and an electron-deficient state of Pd in the catalyst as a result of the strong interaction between the active sites and the oxygen of the oxygen-containing groups on the rGO-Fe3O4 support.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2023
·
IF 6.7
Yue Wu,Jin-Hui Shi,Guang-Hao Zhu,Yuan Xiong,Jia-Hao Gong,Hui-Zhen Wei,Zhao-Bin Guo,Zi-Ru Dai,Xiao-Bo Sun,Guang-Bo Ge
Human cytochrome P450 1B1 (hCYP1B1), an extrahepatic cytochrome P450 enzyme over-expressed in various tumors, has been validated as a promising target for preventing and treating cancers. Herein, two series of chalcone derivatives were synthesized to discover potent hCYP1B1 inhibitors without AhR agonist effect. Structure-activity relationship (SAR) studies demonstrated that 4′-trifluoromethyl on the B-ring strongly enhanced the anti-hCYP1B1 effects, identifying A9 as a promising lead compound. Further SAR analysis on A9 derivatives (modified A-ring of 4′-trifluoromethylchalcone) showed that introducing 2-methoxyl improved the anti-hCYP1B1 effect and selectivity , while introducing a methoxyl at the C-4 site was beneficial for avoiding AhR activation. Ultimately, five 4′-trifluoromethyl chalcones were identified as potent hCYP1B1 inhibitors (IC 50 < 10 nM), while B18 exhibits the most potent anti-hCYP1B1 effect (IC 50 = 3.6 nM), suitable metabolic stability and good cell-permeability. B18 also acted as an AhR antagonist and could down-regulate hCYP1B1 in living systems. Mechanistic studies showed that B18 potently inhibited hCYP1B1 in a competitive inhibition manner ( K i = 3.92 nM), while docking simulations revealed that B18 could tightly bind to the catalytic cavity of hCYP1B1 mainly via hydrophobic and hydrogen-bonding interactions. Furthermore, B18 could potently inhibit hCYP1B1 in living cells and showed remarkable anti-migration ability on MFC-7 cells. Taken together, this study deciphered the SARs of chalcones as hCYP1B1 inhibitors and provided several potent hCYP1B1 inhibitors as promising candidates for the development of more efficacious anti-migration agents.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 18
·1900256
·
IF 2.622
Majid Basharat,Wei Liu,Shuangkun Zhang,Yasir Abbas,Zhanpeng Wu,Dezhen Wu
Functional photoluminescent materials with a tunable multicolor emission without incorporation of metals is the current focus on luminescent materials due to their multifaceted applications. Herein, novel poly(cyclotriphosphazene-co-tris(4-hydroxyphenyl)ethane) microspheres are synthesized with size distribution of ≈0.8–1.6 µm by reacting hexachlorocyclotriphosphazene and tris(4-hydroxyphenyl)ethane at different molar ratios under facile conditions. The thermogravimetric analysis shows that the microspheres are highly thermally stable with 10% weight loss at around 500 °C. Fluorescence microscopy results show that the microspheres emit three blue, green, and red colors with an emission maximum at 487, 530, and 623 nm under different excitation wavelengths of 365, 420, and 546 nm, respectively. Furthermore, under UV and visible (365 and 420 nm) excitations, microspheres demonstrate extraordinary photobleaching stability and highly intense luminescence for expending time and repeating excitations. The microspheres also demonstrate semiconductor-like optical absorption at 235–285 nm with a tail extended to 700 nm. This exploration provides an insight for the preparation of intrinsic superior wavelength tunable multicolor emission materials from phosphazene. These microspheres are potential candidates for anti-counterfeits, solar cells, full spectrum fluorescence emitters, organic light emitting diodes, biological, catalysis applications and unlock new areas of research on multicolor photoluminescence.
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