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Triplet bismuthinidenes featuring unprecedented giant and positive zero field splittings

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National Science Review 2023年第10期10卷 79-85页

作者： Mengyuan Wu wang Chen Dongmin wang Yizhen Chen Shengfa Ye Gengwen Tan Innovation Center for Chemical Sciences Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials Science Soochow University State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistryIGCME Sun Yat-sen University State Key Laboratory of Elemento-Organic Chemistry Nankai University

Isolation of triplet pnictinidenes,which bear two unpaired electrons at the pnictogen centers,has long been a great challenge due to their intrinsic high ***,we report the syntheses and characterizations of two bismuthinidenes MsFluindtBu-Bi(3) and MsFluind*-Bi(4) stabilized by sterically encumbered hydrindacene *** were facilely prepared through reductions of the corresponding dichloride precursors with 2 molar equivalents of potassium *** structural analyses revealed that 3 and 4contain a one-coordinate bismuth atom supported by a Bi-C single σ *** a consequence,the remaining two Bi 6p orbitals are nearly degenerate,and 3 and 4 possess triplet ground *** characterizations with multinuclear magnetic resonance,magne tome try and near infrared spectroscopy coupled to wavefunction based ab initio calculations concurred to evidence that there exist giant and positive zero field splittings(>4300 cm-1) in their S=1 ground *** even at room temperature the systems almost exclusively populate the lowest-energy nonmagnetic Ms=0 level,which renders them seemingly diamagnetic.

关键词： bismuth bismuthinidene triplet state zero field splitting theoretical calculation

Self-templating synthesis of Pd_(4)S hollow nanospheres as electrocatalysts for oxygen reduction reaction

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Nano Research 2023年第2期16卷 2597-2603页

作者： Qian wang Donghui Zhao Jialong Yu Lijie Shi Yawen wang Hongyu Chen Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China School of Science Westlake UniversityHangzhou 310023China

Hollow nanostructures with structural advantages have been widely exploited as catalysts in electrochemical ***,there are only limited strategies for constructing hollow Pd-based *** this work,Pd4S hollow nanospheres(Pd4S HNSs)are synthesized with a facile wet-chemical method via a self-templating *** Pd-L-cysteine solid nanospheres(SNSs)were firstly obtained by the coordination of L-cysteine with Pd^(2+),and then in situ converted to hollow nanospheres in the following reduction *** formation mechanism of the Pd4S HNSs was studied,and the size of the Pd4S HNSs can be readily adjusted by tuning the size of the *** hollow morphology would help the exposure of active sites and the prevention of aggregation during the catalytic *** a result,the Pd4S HNSs exhibit improved catalytic performances in the oxygen reduction reactions,with a half-wave potential of 0.913 V *** hydrogen electrode(RHE)and impressive stability in the accelerated durability test.

关键词： Pd4S hollow nanospheres self-templating electrocatalysis oxygen reduction reaction

High-frequency magnetic properties of biphase Ce_(2)Fe_(17)N_(3)/α-Fe microflakes with easy-plane anisotropy

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Journal of Rare Earths 2024年第1期42卷 110-115,I0004页

作者： Ke wang Hang Zhang Yuandong Huang Zhibiao Xu Fashen Li Tao wang Key Laboratory for Magnetism and Magnetic Materials of MOE Lanzhou UniversityLanzhou730000China Key Laboratory of Special Function Materials and Structure Design Ministry of EducationLanzhou UniversityLanzhou730000China

Soft magnetic composites(SMCs)are effective as magnetic powder cores in an *** to high saturation magnetization,large magnetocrystalline anisotropy and high operating frequency of M(metal)-RE(rear earth)soft magnetic composites,it is possible to miniaturize inductor cores by reducing total loss,especially eddy current loss and excess loss at high *** this article,the characteristics of Ce_(2)Fe_(17)N_(3)/α-Fe(CFN/F)loss per volume and effective permeability reaching a high frequency of 3 MHz are *** biphase CFN/F composite exhibits a high permeability of 16 at 70 MHz,which is two times greater than that of pure Ce_(2)Fe_(17)N_(3)(CFN)*** total loss is as low as 545 mW/cm^(3)at 3 MHz and 6 *** direct current(DC)-bias properties have a percent of permeability exceeding 65% at H=7960 A/*** phenomenon indicates that our material has a higher working frequency and lower core loss than other materials;the biphase CFN/F structure is a promising and efficient approach for developing the miniaturized radio frequency(RF)inductor core.

关键词： High frequency Soft magnetic composites Easy-plane anisotropy Permeability spectra Core loss Rare earths

Level and characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans in feed and feed additives

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Journal of Environmental Sciences 2017年第1期29卷 324-331页

作者： Lingyun wang Gangdou Ding Zhiguang Zhou Xun Liu Yixiao wang HeidQunhui Xie Tuan Xu Pu wang Bin Zhao State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China. University of Chinese Academy of Sciences BeijingChina Dioxin Laboratory Chinese Academy of Inspection and Quarantine Comprehensive Test CenterBeijing 100123China State Environmental Protection Key Laboratory of Dioxin Pollution Control National Research Center for Environmental Analysis and MeasurementBeijing 100029China

Feed security is a prerequisite for safe animal food *** this study,13 groups of feed and feed ingredients,totaling 2067 samples,were collected in the period of 2011 to 2014 from *** highest mean level of polychlorinated dibenzo-p-dioxins and dibenzofurans（PCDD/Fs） was found in fish meals and shell powders,with a concentration of 60.35 ng/kg,followed by mineral origin *** terms of the toxicity equivalent concentration,the fish oil group showed the highest PCDD/F levels because of their bio-accumulation through the aquatic food chain,with an average concentration of 1.26 ng WHO-TEQ/kg,while the lowest level was observed in compound feed for chickens and pigs,with an average value of0.16 ng WHO-TEQ/*** and OCDF were the predominant congeners in all groups except fish oils,in which the primary congeners were 2,3,4,7,8-PeCDF and 2,3,7,*** zinc chloride samples,different from other zinc-based compound samples,the main congeners were 1,2,3,4,6,7,8-HpCDF（17%）,1,2,3,4,7,8,9-HpCDF（15%）,1,2,3,4,7,8-HxCDF（12%） and OCDF（30%）.Considering toxicity equivalency factors,the dominant congeners were 2,3,4,7,8-PeCDF,1,2,3,4,7,8-HxCDF,2,3,7,8-TCDF and 1,2,3,7,8-PeCDD,and the contribution to the total TEQwas29%,16%,14%and 12%,***,2.1%（43 out of 2067） of all the analyzed samples exceeded the different individual ＇European Union maximum limited levels for PCDD/*** study is beneficial for the determination of the status of contamination levels of feed and feed ingredients.

关键词： PCDD/Fs Chinese feed Feed additives Characterization

Mechanism of corrosion behavior induced by precipitates under plastic compressive stress in Mg-Gd-Y alloys

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Journal of Rare Earths 2024年第12期42卷 2183-2195,I0001页

作者： Lele Liu Ping wang Yimeng wang Weiming Li Min Xu Haoyan Xue School of Materials and Chemical Engineering Xi'an Technological UniversityXi'an710021China

Through independently developed stress-loading equipment,stress corrosion tests on Mg-Gd-Y alloy were conducted in a 3.5 wt%NaCl *** effects of plastic compressive stress on the corrosion behavior of the alloy were thoroughly investigated using scanning electron microscopy(SEM)and transmission electron microscopy(TEM)among other microscopic analysis *** results indicate that the alloy mainly consists of a-Mg grains,Mg24Y5 phase,Mg5Gd phase,and LPSO *** corrosion behavior of the Mg-Gd-Y alloy is significantly influenced by the microstructure of the interface between the precipitates and the matrix,the potential difference,and the stress *** the unstressed state,the Mg24Y5 phase first induces corrosion at the edges of the a-Mg grain boundaries,which then spreads *** the application of plastic stress,the corrosion-inducing capability of the LPSO phase on a-Mg grains notably *** discovery provides new insights into the mechanisms by which plastic compressive stress affects the corrosion behavior of Mg-Gd-Y alloys and offers an important basis for the theoretical research and anti-corrosion design in the engineering applications of this alloy.

关键词： Plastic compressive stress Mg-Gd-Y alloy Precipitate phases LPSO Corrosion induction mechanisms Rare earths

17.13% Efficiency and Superior Thermal Stability of Organic Solar Cells Based on a Comb-Shape Active Blend

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Energy & Environmental Materials 2023年第6期6卷 266-272页

作者： Zhipeng Yin Qingjie wang Huan Zhao Haiqiao wang Ning Li Weijie Song School of Materials Science and Engineering NingboTech UniversityNingbo 315100China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

With rapid progress,organic solar cells(OSCs)are getting closer to the target of real ***,the stability issue is still one of the biggest challenges that have to be ***,the thermal stability of OSCs is far from meeting the requirements of the ***,based on the layer-by-layer(LBL)process and by utilizing the dissolubility nature of solvent and materials,binary inverted OSCs(ITO/AZO/PM6/BTP-eC9/MoO3/Ag)with comb shape active morphology are *** efficiency of 17.13%and simultaneous superior thermal stability(with 93%of initial efficiency retained in~9:00 h under 85℃in N_(2))are demonstrated,showing superior stability to reference *** enhancements are attributed to the formed optimal comb shape of the active layer,which could provide a larger D/A interface,thus more charge carriers,render the active blend a more stable morphology,and protect the electrode by impeding ion's migration and *** the best of our knowledge,this is the best thermal stability of binary OSCs reported in the literature,especially when considering the high efficiency of over 17%.

关键词： comb-shape blend high efficiency organic solar cell thermal stability

A global perspective on microbial risk factors in effluents of wastewater treatment plants

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Journal of Environmental Sciences 2024年第4期138卷 227-235页

作者： Kejing Chen Jinsong Liang Yuhan wang Yechen Tao Yun Lu Aijie wang School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Shenzhen Guohuan Environmental Protection Technology Development Co. LTD.Shenzhen 518055China State Key Joint Laboratory of Environmental Simulation and Pollution Control State Environmental Protection Key Laboratory of Microorganism Application and Risk ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Effective monitoring and management of microbial risk factors in wastewater treatment plants(WWTPs)effluents require a comprehensive investigation of these risks.A global survey on microbial risk factors in WWTP effluents could reveal important insights into their risk *** study aims to explore the abundance and types of antibiotic resistance genes(ARGs),virulence factor genes(VFGs),the vector of ARG/VFG,and dominant pathogens in global WWTP *** collected 113 metagenomes of WWTP effluents from the Sequence Read Archive of the National Center for Biotechnology Information and characterized the microbial risk *** results showed that multidrug resistance was the dominant ARG type,while offensive virulence factors were the most abundant type of *** most dominant types of ARGs in the vector of plasmid and phage were both aminoglycoside resistance,which is concerning as aminoglycosides are often a last resort for treating multi-resistant *** baumannii was the most dominant pathogen,rather than Escherichia coli,and a weak negative correlation between Escherichia coli and two other dominant pathogens(Acinetobacter baumannii and Bacteroides uniformis)suggests that using Escherichia coli as a biological indicator for all pathogens in WWTP effluents may not be *** Getah virus was the most dominant virus found in global WWTP *** study presents a comprehensive global-scale investigation of microbial risk factors in WWTP effluents,providing valuable insights into the potential risks associated with WWTP effluents and contributing to the monitoring and control of these risks.

关键词： Wastewater treatment plant Microbial risk factor Effluent Pathogen Antibiotic resistance gene Virulence factor gene

Large-scale automatic block adjustment from satellite to indoor photogrammetry

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Geo-Spatial Information Science 2023年第2期26卷 160-174页

作者： Deren Li Bo Yang Mi wang Taiping wang Yunlong Gao Yingdong Pi State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina

Block Adjustment(BA)is a critical procedure in the geometric processing of satellite images,responsible for compensating and correcting the geometric positioning errors of the *** accuracy of the photogrammetric products,including Digital Orthophoto Map(DOM),Digital Elevation Model(DEM),Digital Line Graphic(DLG),and Digital Raster Graphic(DRG),directly depends on the accuracy of BA *** recent years,the rapid development of related technologies such as Artificial Intelligence(AI),Computer Vision(CV),Unmanned Aerial Vehicles(UAVs)and big data has greatly facilitated and transformed the classical BA in *** paper first reviews the current status of BA and then looks into the ***,this paper provides a brief review of the key technologies involved in BA,including image matching,the establishment of adjustment model,the determination of the parameters and the detection of gross ***,taking the intercross and fusion of current technologies such as AI,cloud computing and big data with photogrammetry into account,this paper explores the future trends of ***,four typical cases of large-scale adjustment are introduced,including large-scale BA without Ground Control Points(GCPs)for optical stereo satellite images,large-scale BA with laser altimetry data for optical stereo satellite images,large-scale BA for UAV oblique photogrammetry,and large-scale BA for indoor photogrammetry in caves with a large number of close-range images.

关键词： Block Adjustment(BA) large-scale image matching control points review

Symbiotic mycorrhizal types affect patterns of tree aboveground and belowground C allocation in Northeast China

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Ecological Processes 2023年第1期12卷 379-387页

作者： Qinggui wang Guoyong Yan Xi Luo Guancheng Liu Honglin wang Yajuan Xing School of Life Sciences Qufu Normal UniversityQufu 273165China College of Modern Agriculture and Ecological Environment Heilongjiang UniversityHarbin 150080China

Background Given the ubiquitous nature of mycorrhizal symbioses,different symbiotic fungi have obvious differences in structure and function,which may affect associated tree aboveground and belowground C allocation ***,the mechanisms underlying tree aboveground and belowground C allocation and its response to symbiotic mycorrhizal types and other factors(e.g.,resource availability)remain poorly *** We used forest inventory data to explore the potential mechanism of tree aboveground and belowground C allocation patterns in Northeast *** results showed that tree-fungal symbioses were related to the patterns of tree C *** ratio of aboveground to belowground C pool was significantly higher in ectomycorrhizal(EM)-associated trees than that in arbuscular mycorrhizal(AM)-associated *** mycorrhizal types were associ-ated with the responses of tree aboveground and belowground C allocation to different factors,such as mean annual precipitation(MAP)and mean annual temperature(MAT).Almost all factors significantly increased aboveground C allocation in AM-associated trees but significantly decreased it in EM-associated ***,after controlling the other factors,the effects of climate factors(MAT and MAP)on the C allocation of AM-and EM-associated trees were *** in MAT and MAP significantly increased belowground and aboveground C allocation,*** Our results demonstrate symbiotic mycorrhizal types play an important role in controlling tree aboveground and belowground C allocation and dynamics.

关键词： Symbiotic mycorrhizal type Tree carbon allocation pattern Forest carbon cycling Plant-climate interaction Temperate forest

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