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Two monofluoride-bridged Dy~Ⅲdimers with different magnetization dynamics

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Chinese Chemical Letters 2023年第6期34卷 454-458页

作者： mengmeng Wang xixi meng Ning Liu Yi-Quan Zhang Na Xu Wei Shi Peng Cheng Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China Jiangsu Key Lab for NSLSCS School of Physical Science and TechnologyNanjing Normal UniversityNanjing 210023China

As a monoatomic bridge,fluoride ion can transmit efficient magnetic interaction between lanthanide ions but its effect on tuning the magnetization dynamics has not been well ***,two monofluoride-bridged dinuclear dysprosium complexes[Dy_(2)F(bbpen)_(2)(Et OH)_(2)]Br·Et OH(1)and[Dy_(2)F(bbppy)_(2)]Br·2Et OH(2)with Dy-F-Dy angles of~178°and their diamagnetic-ion diluted analogues 1'and 2'were *** studies reveal that 1 and 1'barely show any magnetization dynamics,but 2 and 2'exhibit strong magnetization *** experimental analysis combined with ab initio calculations reveals that the different magnetization dynamics between 1 and 2 mainly originate from the effect of magnetic anisotropy by terminal ligand and bridging group of the chelating ligand,and the fluoride bridge can effectively suppress the quantum tunneling of the magnetization and turn on Orbach process in 2.

关键词： Fluoride ion bridge Dinuclear Dy~Ⅲcomplexes Magnetization dynamics Single-molecule magnet Suppressing QTM

Enhanced activation of peroxymonosulfate by Fe/N co-doped ordered mesoporous carbon with dual active sites for efficient removal of m-cresol

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Chinese Journal of Chemical Engineering 2024年第1期65卷 130-144页

作者： Donghui Li Wenzhe Wu Xue Ren xixi Zhao Hongbing Song meng Xiao Quanhong Zhu Hengjun Gai Tingting Huang College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Chemical&Environmental Engineering China University of Mining&Technology-BeijingBeijing 100083China

The novel Fe-N co-doped ordered mesoporous carbon with high catalytic activity in m-cresol removal was prepared by urea-assisted impregnation and simple pyrolysis *** the preparation of the Fe-NC catalyst,the complexation of N elements in urea could anchor Fe,and the formation of C3N4during urea pyrolysis could also prevent migration and aggregation of Fe species,which jointly improve the dispersion and stability of *** FeN4sites and highly dispersed Fe nanoparticles synergistically trigger the dual-site peroxymonosulfate (PMS) activation for highly efficient m-cresol degradation,while the ordered mesoporous structure of the catalyst could improve the mass transfer rate of the catalytic process,which together promote catalytic degradation of m-cresol by PMS *** oxygen species (ROS) analytic experiments demonstrate that the system degrades m-cresol by free radical pathway mainly based on SO_(4)^(-)·and·OH,and partially based on·OH as the active components,and a possible PMS activation mechanism by 5Fe-50 for m-cresol degradation was *** study can provide theoretical guidance for the preparation of efficient and stable catalysts for the degradation of organic pollutants by activated PMS.

关键词： Degradation Peroxymonosulfate Fe(II)/Fe(III)/FeN4 Ordered mesopores carbon Catalyst Radical

Preparation and Swelling Kinetic Analysis of Poly (HPMC-co-AA-co-AM) Super Absorbent Resin

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 790-799页

作者：马砺 WANG Xin LIU xixi WEI Gaoming GUO Ying School of Safety Science and Engineering Xi’an University of Science and TechnologyXi'an 710054China Key Laboratory of Coal Fire Disaster Prevention Xi’an University of Science and TechnologyXi'an 710054China School of Energy Engineering Xi’an Uni-versity of Science and TechnologyXi'an 710054China Yanzhou Coal Mining Co. Ltd.Zoucheng 237500China

Super absorbent resin(SAR)is prepared by aqueous high temperature polymerization using hydroxypropyl methylcellulose(HPMC)as monomer backbone material,acrylic acid(AA)and acrylamide(AM)as the graft copolymer monomer,potassium persulfate(KPS)as the initiator to generate free radicals,and N,N`-methylenebisacrylamide(MBA)as cross-linking agent for cross-linking ***,the influence of individual factors on the water absorption is investigated,and these factors are mainly AA,AM,KPS,MBA,HPMC,and reaction *** optimized conditions are obtained by the experiment repeating for several *** water absorption multiplicity and salt absorption multiplicity under the conditions are 782.4 and 132.5 g/g,***,the effects of different temperatures and salt concentrations on its water absorption,as well as the swelling kinetics of SAR are *** is indicated the water-absorbing swelling process is mainly caused by the difference in water osmotic pressure and Na+concentration inside and outside the cross-linked molecular structure of the resin,which is not only consistent with the quasi-secondary kinetic model,but also with the Fick diffusion model.

关键词： super absorbent resin swelling kinetics water absorption graft copolymerization hydroxypropyl methyl cellulose

Electrode/Electrolyte Interfacial Chemistry Modulated by Chelating Effect for High-Performance Zinc Anode

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Energy & Environmental Materials 2024年第3期7卷 93-99页

作者： Chuanlin Li Guangmeng Qu xixi Zhang Chenggang Wang Xijin Xu School of Physics and Technology University of JinanJinan 250022China School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

Although Zn metal has been regarded as the most promising anode for aqueous batteries,its practical application is still restricted by side reactions and dendrite ***,an in-situ solid electrolyte interphase(SEI)film formed on the interface of electrode/electrolyte during the plating/stripping of zinc anodes by introducing trace amounts of multidentate ligand sodium diethyldithiocarbamate(DDTC)additive into 1 M ZnSO_(4).The synergistic effect of in-situ solid electrolyte interphase forming and chelate effect endows Zn^(2+)with uniform and rapid interface-diffusion kinetics against dendrite growth and surface side *** a result,the Zn anode in 1 M ZnSO_(4)+DDTC electrolytes displays an ultra-high coulombic efficiency of 99.5%and cycling stability(more than 2000 h),especially at high current density(more than 600 cycles at 40 mA cm^(-2)).Moreover,the Zn//MnO_(2)full cells in the ZnSO_(4)+DDTC electrolyte exhibit outstanding cyclic stability(with 98.6%capacity retention after 2000 cycles at 10 C).This electrode/electrolyte interfacial chemistry modulated strategy provides new insight into enhancing zinc anode stability for high-performance aqueous zinc batteries.

关键词： chelating effect in-situ SEI ultra-high current density Zn anodes

The microscopic formation mechanism of O+H_(2) products from photodissociation of H_(2)O

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Chinese Journal of Structural Chemistry 2024年第5期43卷 11-13页

作者： Yubang Li xixi Hu Daiqian Xie Kuang Yaming Honors School Jiangsu Key Laboratory of Vehicle Emissions ControlNanjing UniversityNanjing210023China Institute of Theoretical and Computational Chemistry Key Laboratory of Mesoscopic ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China

Photodissociation dynamics of water involving its B electronic states yielding OH(A^(2)Σ+/X^(2)Π)+H(^(2)S)products has been intensively investi-gated by both experimental and theoretical studies[1].Theoretically,the Dobbyn-Knowles potential energy surfaces(DK PESs)[2]based on limited complete active space self-consistent field(CASSCF)points were used in dynamic studies for water photodissociation and O+H_(2)reaction about 20 years ago,but the accuracy is not enough to meet current re-quirements.

关键词： mechanism enough yielding

In situ and on-line monitoring of cadmium in soil pore water using an automatic sampling integrated electrochemical sensor

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Science China(Technological Sciences) 2024年第9期67卷 2894-2904页

作者： KUANG JiaJie WEN JunLin CAI xixi ZHOU LiHua YUAN Yong Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China School of Biomedical and Pharmaceutical Sciences Guangdong University of TechnologyGuangzhou 510006China

Cadmium(Cd) contamination in soil pore water is the primary pathway for Cd uptake by food crops,such as rice(Oryza sativa L.),posing significant risks to both food safety and human *** study presents a novel soil pore water metal sensor(SPW-Msensor) for in situ and online monitoring of Cd in soil pore water(Cd_(pw)).The SPW-Msensor integrates an automated sampling device,comprising a Rhizon sampler and a reciprocating series pump with an independent dual plunger drive,along with a portable electrochemical sensor consisting of a screen-printed electrode,flow cell,and portable *** SPW-Msensor enables the detection of Cd within a linear range of 50 to 300 ppb while exhibiting high anti-interference ***,it demonstrates excellent repeatability(relative standard deviation values(RSDs)<3.6%) across 30 measurements conducted within a 2-h *** method exhibits good agreement with results obtained using the standard ICP-MS method(RSDs<5%).Additionally,this study establishes a positive correlation between Cd_(pw)detected by the SPW-Msensor and total Cd concentration(Cd_(total)) in the soil with an R^(2) value equal to *** acquired from the SPW-Msensor can be utilized for predicting Cd_(total)through partial least squares regression modeling,achieving model quality score(Q^(2)) of 0.69,adjusted R^(2) of 0.9345,and root mean square error(RMSE) of *** SPW-Msensor demonstrates real-time monitoring capabilities for assessing Cd levels in acidified *** SPW-Msensor offers an efficient approach for in-situ and continuous monitoring of Cd_(pw)that provides valuable insights applicable to environmental and agricultural domains.

关键词： cadmium pore water electrochemical sensor in-situ monitoring soil

Genetic engineering drives the breakthrough of pig models in liver disease research

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Liver Research 2024年第3期8卷 131-140页

作者： Chenhao Xu xixi Fang Xiao Xu Xuyong Wei Zhejiang University School of Medicine HangzhouZhejiangChina Department of Hepatobiliary and Pancreatic Surgery Hangzhou First People’s HospitalHangzhouZhejiangChina Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province HangzhouZhejiangChina Hangzhou Normal University HangzhouZhejiangChina School of Clinical Medicine Hangzhou Medical CollegeHangzhouZhejiangChina NHC Key Laboratory of Combined Multi-organ Transplantation HangzhouZhejiangChina Institute of Translational Medicine Zhejiang UniversityHangzhouZhejiangChina

Compared with the widely used rodents,pigs are anatomically,physiologically,and genetically more similar to humans,making them high-quality models for the study of liver ***,we review the latest research progress on pigs as a model of human liver disease,including methods for establishing them and their advantages in studying cystic fibrosis liver disease,acute liver failure,liver regeneration,non-alcoholic fatty liver disease,liver tumors,and *** also emphasize the importance of genetic engineering techniques,mainly the CRISPR/Cas9 system,which has greatly enhanced the utility of porcine models as a tool for substantially advancing liver disease *** engineering is expected to propel the pig as one of the irreplaceable animal models for future biomedical research.

关键词： Animal model Liver disease Genetic engineering CRISPR/Cas9 Xenogeneic liver transplantation Pig

基于MOEA和SE-DEA的四站器材应急供应策略研究

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实验室研究与探索 2018年第8期37卷 303-306,325页

作者：孟曦曦黄之杰空军勤务学院航材四站系江苏徐州221000 空军勤务学院基础部江苏徐州221000

航空四站器材保障问题一直作为空军航空兵后勤保障工作的重中之重,尤其是应急条件下的器材供应。为了提高航空四站保障分队器材应急供应能力,保证飞行保障和作战任务顺利进行。与传统的追求单一目标的供应方案不同,构建了四站器材供应... 详细信息

航空四站器材保障问题一直作为空军航空兵后勤保障工作的重中之重,尤其是应急条件下的器材供应。为了提高航空四站保障分队器材应急供应能力,保证飞行保障和作战任务顺利进行。与传统的追求单一目标的供应方案不同,构建了四站器材供应的多目标优化模型,以同时保证最优的供应时间和满足度。利用一种改进的多目标进化算法(MOEA)对构建的模型进行求解,得到一系列非支配解集作为初始供应方案集。为提高方案的实施能力,以供应时间为输入,以各需求点满足率作为输出,采用超效率数据包络分析法(SE-DEA)对方案集进行评估。从而选出有效方案,大幅缩小了决策集规模。研究表明,该策略可以为决策者提供有效的供应方案,适用于四站器材的应急供应保障决策。

关键词：四站保障应急供应多目标进行算法超效率数据包络分析

Skeletal stem cells in bone development,homeostasis,and disease

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Protein & Cell 2024年第8期15卷 559-574页

作者： Guixin Yuan xixi Lin Ying Liu Matthew B.Greenblatt Ren Xu The First Affliated Hospital of Xiamen University-ICMRS Collaborating Center for Skeletal Stem Cell State Key Laboratory of Cellular Stress BiologySchool of MedicineFaculty of Medicine and Life SciencesXiamen UniversityXiamen 361005China Xiamen Key Laboratory of Regeneration Medicine Fujian Provincial Key Laboratory of Organ and Tissue RegenerationOrgan Transplantation InstituteSchool of MedicineXiamen UniversityXiamen 361102China Department of Pathology and Laboratory Medicine Weill Cormell Medical CollegeNew YorkNY 10065USA Research Division Hospital for Special SurgeryNew YorkNY10065USA

Tissue-resident stem cells are essential for development and repair,and in the skeleton,this function is fulfilled by recently identified skeletal stem cells(SSCs).However,recent work has identified that SSCs are not monolithic,with long bones,craniofacial sites,and the spine being formed by distinct stem *** studies have utilized techniques such as fluorescence-activated cell sorting,lineage tracing,and single-cell sequencing to investigate the involvement of ssCs in bone development,homeostasis,and *** investigations have allowed researchers to map the lineage commitment trajectory of ssCs in different parts of the body and at different time ***,recent studies have shed light on the characteristics of ssCs in both physiological and pathological *** review focuses on discussing the spatiotemporal distribution of ssCs and enhancing our understanding of the diversity and plasticity of ssCs by summarizing recent discoveries.

关键词： skeletal stem cells bone development endochondral ossification intramembranous ossification lineage tracing