NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 10
·4911-4919
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IF 3.3
Zhen Li,Yirong Wang,Ce Xu,Xianghong Li,Bingguang Zhang
A cyclometalated ruthenium complex (1) using 2-phenylimidazole as the C, N-ligand was successfully synthesized and used as a chromogenic sensor. The as-prepared sensor displayed a good absorption centered at 565 nm in the visible region. Due to strong hydrogen bonding, the complex demonstrated high sensitivity and selectivity to fluoride over other common anions in CH3CN solution. A large red-shift from 565 to 618 nm accompanied by a solution color change from red to green was achieved. However, in CH3CN/Britton-Robinson buffer (V/V = 1 : 9, pH 4.5), the competition with water resulted in no changes for fluoride. Only the presence of nitrite caused the absorption intensity between 400 and 600 nm to decrease remarkably with the solution color fading to yellow. This phenomenon could be attributed to the formation of ruthenium nitrosyl, which was then isolated and characterized by MS, FT-IR and NMR spectra. Therefore, complex 1 can be used as a chromogenic chemosensor to detect fluoride in CH3CN and nitrite in an acidic aqueous system, respectively.
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NANO
·
2022
·
IF 1.438
Ming Gong,Zhong Wei,Xiaoqiang Cui
Preventing the high recombination rate of carriers in graphite-carbon nitride (GCN) is essential for hydrogen production. In this work, we break the original symmetry of GCN by embedding benzene ring for enhanced visible-light absorption and carriers transfer efficiency. The new catalyst was prepared by a condensation reaction using dicyandiamide and 5-amino-2,4,6-triiodoisophthalic acid as precursors. It shows photocatalytic hydrogen evolution rate of 690.74 μ mol g − 1 h − 1 , 9.3 times enhancement than the original GCN. This work provides a new strategy for designing efficient two-dimensional photocatalytic materials for water splitting.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Tianyou Chen,Jin Hu,Kaizhao Wang,Kaijun Wang,Weijun Zhang,Haijiao Xie,Guoyou Gan,Jin Shi
Electron transfer to CO 2 is commonly regarded as a critical step for activating CO 2 . Herein, we describe the development of a simple and effective strategy to facilitate electron transfer to CO 2 by introducing oxygen vacancies (O V ) in electrocatalysts. We discovered that stirring oxidized eutectic gallium indium is an important pretreatment step for introducing O V . In the subsequent CO 2 reduction process, the oxidized eutectic gallium indium (O-EGaIn) was reduced to the oxide-derived EGaIn (OD-EGaIn), which achieved 4 times higher Faradic efficiency for CO production than the eutectic gallium indium (EGaIn) in a tetrabutylammonium chloride/acetonitrile (Bu 4 NCl/AN) electrolytes. The XPS results showed that the O V concentration in the OD-EGaIn is much larger than that in the O-EGaIn and EGaIn samples. Electrokinetic studies indicated that the introduction of O V facilitates electron transfer to CO 2 . Density functional theory (DFT) calculations further revealed that the electrons tend to accumulate around the O V . These localized electrons then flow to the antibonding orbitals of CO 2 molecules, resulting in activating CO 2 and forming the key CO 2 •− radical.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Yiran Sun,Jiayu Pei,Xi Chen,Mengwen Lin,Yun Pan,Yingying Zhang,Wenlin Bai,Xingfan Zhou,Wenping Zhang
Chlorpyrifos (CPF) is associated with depression, cognitive dysfunction, and other neurological disorders. Increasing evidence has suggested that the gut microbiota plays a vital role in regulating the development of depression. However, it is unknown whether gut microbiota is associated with CPF-related depression. This study aimed to explore the effect of CPF on depressive-like behavior in mice and investigated the role of gut microbiota in this behavior. In our study, we selected fifty male C57BL/6 J mice for the model and subjected them to CPF poisoning by gavage for 14 days. The depressive-like behaviors of mice were assessed by the open field test (OFT), sucrose preference test (SPT), and forced swimming test (FST). Furthermore, we selected the high-dose group (CPF10) with obvious changes in depressive-like behaviors for the hippocampus and colon histopathological analysis, examined the changes in the gut microbiota by 16 S rRNA sequencing, screened the different microbiota among groups by linear discriminant analysis effect size (LEfSe), analyzed the correlation between intestinal bacteria and depression-like behavior indicators by Spearman analysis, and evaluated the predictive ability of different bacteria to CPF-induced depressive-like behavior using the receiver operator characteristic (ROC) curve. The results showed that CPF caused depressive-like behaviors with pathological changes in the hippocampus and colon. CPF induced changes in gut microbiota, including 49 differential bacteria. Among the top 10 abundant bacteria, Actinobacteria and Deferribacteres were increased, and Cyanobacteria , Patescibacteria and Verrucomicrobia were decreased at the phylum level. Muribaculum , Ruminococcaceae.UCG.014 and uncultured Bacteroides bacterium were decreased at the genus level. Correlation analysis demonstrated that 18 differentially abundant bacteria were correlated with CPF-induced depression. ROC curves revealed that Deferribacteres , Mucispirillum , Rikenella and GCA900066575 are potential biomarkers for depression caused by CPF. These findings will provide an experimental basis for the neurological health of the pesticide-exposed population.
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FUEL
·
2023
·
IF 7.4
Juan Li,Xiaolei Jiang,Mingyuan Zhu,Bin Dai
Oxidative desulfurization (ODS) is a promising technique for obtaining clean fuel. Designing and researching zirconium-based metal–organic frameworks (Zr-MOFs) with bimetallic catalytic sites are encouraging for its further development. In this study, Cu(Ⅰ)-MOF-808 was successfully synthesized through anchoring Cu + in MOF-808. Pyridine infrared spectrum (Py-IR) and NH 3 temperature programmed desorption (NH 3 -TPD) confirmed that Lewis (L) acid sites existed in the synthesized material. Cu(Ⅰ)-MOF-808 was applied into the ODS reaction, during the reaction process, L acid sites adsorbed sulfide, Cu + sustainably provided electron to H 2 O 2 to formed into •OH, with the synergistic effect of L acid sites and Cu + , 99.9 % of the dibenzothiophene was oxidated to dibenzothiophene sulfone in 120 min. In addition, the cyclic experiment indicated that the ODS performance of Cu(Ⅰ)-MOF-808 was maintained at 99.2 % after 12 times recycling. Powder X-ray diffraction (PXRD) spectra indicated the framework structure of the reused catalyst was stable, inductively coupled plasma optical emission spectrometer (ICP-OES) result displayed no metal ions (Zr, Cu) leaching after the ODS reaction, which also proved the catalytic stability of the Cu(Ⅰ)-MOF-808.
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Environmental Science-Nano
·
2023
·Vol. 10
·期 3
·834-842
·
IF 7.3
Wei-Qi Zhang,Yi-Dan Tu,Xu-Gang Wang,Yu Huang,Fan Xia
Microcystin-LR (MC-LR) is a known hepatotoxin that is the most abundant and potent cyanobacterial toxin. The development of a strategy for sensitive MC-LR detection is highly demanded. In this work, a novel solid-state nanochannel-based sensing system was constructed by in situ growth of metal–organic frameworks (MOFs) on anodic aluminum oxide (AAO) nanochannels and modification with an MC-LR-specific aptamer as a probe. The MOF was employed to reduce the effective diameter of the nanochannels and provided abundant functional active sites for the probes. As a result, highly sensitive MC-LR detection was realized with the limit of detection reaching 0.004 ng mL−1. Compared to the nanochannels without MOF modification, the sensitivity has been significantly improved, by around 10 000-fold. Furthermore, highly reliable detection of MC-LR in various water samples was also achieved, with a relative standard deviation of less than 5.46% and recovery between 93.90% and 106.73%. This strategy provides significant insight for practical applications of nanochannel-based sensing systems, including environmental contaminant detection, food analysis, and medical analysis.
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MOLECULES
·
2022
·Vol. 27
·期 23
·8271
·
IF 4.927
Jinghe Zhang,Yinan Wang,Changhong Wang,Kan Li,Weifang Tang,Jing Sun,Xikui Wang
When Aristolochia plants wilt and decay, aristolochic acids (AAs) are released into the soil, causing soil contamination. It has been demonstrated that aristolochic acid can be accumulated and enriched in crops through plant uptake. However, there is a lack of systematic studies on the migration and accumulation of AAs in a realistic simulated soil environment. In this study, Aristolochia herbal extracts were mixed with soil for growing three typical vegetables: lettuce, celery, and tomato. The contents of AAs in the above-mentioned plants were determined by an established highly sensitive LC-MS/MS method to study the migration and accumulation of AAs. We found that AAs in the soil can be transferred and accumulated in plants. AAs first entered the roots, which were more likely to accumulate AAs, and partially entered the above-ground parts. This further confirms that AAs can enter the food chain through plants and can have serious effects on human health. It was also shown that plants with vigorous growth and a large size absorbed AAs from the soil at a faster rate. The more AAs present in the soil, the more they accumulated in the plant.Keywords:aristolochic acid;vegetables;uptake;translocation;fate
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Jiayi Xu,Hanpei Yang,Jun Hou,Lingzhan Miao,Jun Wu
Ferrihydrite (Fh) often coexists with organic matter (i.e., humic acid (HA)) in the environment; however, its impacts on the transformation of hexavalent chromium (Cr(VI)) is poorly understood during the sulfidation of Fh. Upon exposed to 2 mM sulfide for 12 h, the total amount of Fe(II) (Fe( II ) tot , 0.78 mM) in treatments with HA (300 mg HA/L) was higher than that (0.67 mM) in treatments without HA, since HA could enhance the solubility of Fe(II). After then, the Cr(VI) was reduced by sulfidated Fh. Aqueous Cr(VI) concentration (Cr( VI ) aq ) declined from 0.67 to 0.43 mM with the increase of HA concentration from 0 to 400 mg/L, which was partly ascribed to the inhibition of surface passivation by HA. Moreover, the increase in Fe(II) during the sulfidation of Fh also exerted a strong impact on the transformation of Cr(VI) subsequently. In addition of HA, batch experiments suggested that EDTA could also promote the formation of Fe(II) (Fe( II ) tot , 0.80 mM), rendering a lower Cr( VI ) aq (0.59 mM) in EDTA-300 treatments. This study further demonstrated that HA played an important role in the transformation of Cr(VI), hence providing a theoretical basis for in-situ remediation of Cr(VI) in the future.
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Materials Today Communications
·
2023
·
IF 3.8
Yusheng Yang,Bai Sun,Guangdong Zhou,Chuan Ke,Jie Zhang,Yongzan Zhou,Shuangsuo Mao,Jiajia Qin,Yong Zhao
Since memristors have shown great application prospects in non-volatile memory, neural synapse, brain-like chips, artificial intelligence (AI) and quantum computers, the research of memristors has received extensive attention. In this work, the resistive switching (RS) device with Ag/SrTiO 3 (STO)/Ti structure was fabricated, and it can significantly improve the RS performance of device by doping Mn ions into STO to replace part of Ti ions . That is to say, the Ag/Mn-doped SrTiO 3 (SMTO)/Ti device exhibits larger resistance window and better retention at room temperature. Finally, through in-depth mechanistic analysis, a physical model of the conducting filament and Schottky emission was established to understand the charge transport mechanism and RS behavior of the device. In particular, it provides favorable factors for the migration of ions and electrons through the Mn doping because the substitution of Mn for Ti ions reduces the volume of the STO crystal while distorting its crystal shape since the ionic radius of Mn is smaller than that of Ti. This work provides an important way to improve the RS properties of ABO 3 -type perovskite-based resistive random access memory (RRAM), and helps to explore the cutting-edge applications of high-performance RS devices in information processing and AI.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yi Zhang,Da Luo,Yin Zhang,Qi-Hai Zhang,Qing-Yuan Ji,Shi-Kang Zhou,Shan Huang,Li-li Li,Feng Lu,Wei-Feng Yao,Fang-Fang Cheng,Jun-Jie Zhu,Li Zhang
Upconversion nanoparticles (UCNPs) are promising materials for imaging biomolecules and predicting the progression of diseases, especially for tumors. However, conventional luminescence resonance energy transfer (LRET) based nanosensors remain challenging with complicated modification and unsatisfactory sensitivity. Herein, a sensing platform integrating confined emission effect and cycling amplification strategy into one substrate with high LRET efficiency and sensitivity has been developed for the in - vitro and in - vivo detection of microRNA-21. Washing UCNPs with hydrochloric acid was conducted for electrostatic absorption of 8–17 DNAzyme labeled with BHQ1 (8–17 DNAzyme-BHQ1) and complementary capturing template-aDNA3 complex (CPT-aDNA3) to form energy donor–acceptor pair (UCNPs-BHQ1) and capture miR-21. It not only avoids the complex modification procedure but also shortens the distance between the donor (UCNPs) and the acceptor (BHQ1). The quenching efficiency of 60.94 % was obtained. Targeted miR-21 could bind with CPT to release aDNA3 that can unlock 8–17 DNAzyme-BHQ1 to form aDNA3-DNAzyme-BHQ1 duplex. This aDNA3-DNAzyme-BHQ1 duplex owning -rA- group can be cleaved by Zn 2+ so that UCNPs restored green UCL emission because of the desorption of BHQ1. aDNA3 becomes dissociative again to trigger the next cycle. This [email protected] /CPT- aDNA3 achieved a wide linear range from 4 × 10 -14 M to 1 × 10 -8 M with a low limit detection of 31 fM for the sensitive detection of miR-21 in vitro . Furthermore, it was successfully applied to the real-time intracellular detection of miR-21 in HeLa cells and in - vivo monitoring of miR-21 expression in KS-01 treated tumor-bearing mouse. This proposed DNA-conjugated upconversion nanoamplicon provides new sights into monitoring of anti-cancer active ingredients efficacy and the progress evaluation of miRNA-related diseases.
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TOXICOLOGY LETTERS
·
2023
·
IF 3.5
Jinping Shao,Wenli Yu,Wei Wei,Suifeng Wang,Zhenli Zheng,Lei Li,Yanyan Sun,Jingjing Zhang,Zhihua Li,Xiuhua Ren,Weidong Zang,Jing Cao
The voltage-gated sodium channel subtype Nav1.6 is involved in the electrophysiological changes of primary sensory neurons that occur in oxaliplatin-induced neuropathic pain , but its regulatory mechanism remains unclear. In this study, Western blot , RT-qPCR, immunofluorescence staining, chromatin immunoprecipitation were used to prove the mechanism of MAPK-ERK-CREB signaling pathway participating in oxaliplatin-induced neuropathic pain by regulating Nav1.6. The results showed that p-Raf1 and p-ERK, key molecules in MAPK/ERK pathway, and Nav1.6 were significantly increased in DRGs of oxaliplatin-induced neuropathic pain rats. Inhibition of p-Raf1 and p-ERK respectively not only reduced the expression of Nav1.6 protein in DRGs of OXA rats, but also caused a decrease in Nav1.6 mRNA, which led us to further explore the transcription factor CREB regulated by MAPK/ERK pathway. Results showed that CREB was co-distributed with Nav1.6. Inhibition of CREB resulted in decreased mRNA and protein expression of Nav1.6, and alleviated oxaliplatin-induced neuropathic pain. A chromatin immunoprecipitation experiment proved that OXA caused p-CREB to directly bind to the promoter region of Scn8A, which is the encoding gene for Nav1.6, and promote the transcription of Scn8A. In summary, in this study, we found that oxaliplatin can activate the MAPK/ERK pathway, which promotes the expression and activation of CREB and leads to an increase in Scn8A transcription, and then leads to an increase in Nav1.6 protein expression to enhance neuronal excitability and cause pain. This study provides an experimental basis for the molecular mechanism of sodium channel regulation in oxaliplatin-induced neuropathic pain.
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Analytical Methods
·
2023
·Vol. 15
·期 29
·3510-3521
·
IF 3.1
Na Hang,Yang Yang,Yuyue Zang,Wanning Zhao,Jing Tao,Songqing Li
This study assessed the use of magnetic biosorbents in dispersive solid-phase extraction with a gas chromatograph-electron capture detector for the determination of trifluralin, chlorothalonil, transfluthrin, bromopropylate, and bifenthrin in water samples. To our knowledge, this is the first time that magnetic cork composites are used as an adsorbent in dispersive solid-phase extraction. The advantages of magnetic cork composites include their density regulation and high surface areas. The magnetic composites can be recovered using a magnetic field for desorption purposes, which can improve the operation process and reduce the extraction time. Moreover, the parameters affecting the extraction performances were optimized. The method has a limit of detection between 0.30 and 2.02 μg L−1. Good linearities (R2 > 0.99) were obtained in the linear range of 1.00 to 2000 μg L−1. The relative recoveries of the analytes in tap water, river, and lake water samples spiked at different concentrations ranged between 90% and 104%, and the relative standard deviations were less than 7.1%. Therefore, this study showed that Fe3O4/cork magnetic composites can be used as efficient and eco-friendly biosorbents in dispersive solid-phase extraction for the determination of pesticides in water samples. The use of these composites contributes to the current trend of green chemistry.
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