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Polyoxometalate-encapsulated metal-organic frameworks with diverse cages for the C-H bond oxidation of alkylbenzenes

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Chinese Journal of Structural Chemistry 2023年第2期42卷 35-42页

作者： Yue Wang ze-xuan liu Xing-Pu Zhao Yuan-Yuan Ma Si-Meng Zhang Wen-Jing Cui Jing Du Zhan-Gang Han Hebei Key Laboratory of Organic Functional Molecules Hebei Key Laboratory of Inorganic NanomaterialsNational Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuangHebei050024PR China Testing and Analysis Center Hebei Normal UniversityShijiazhuangHebei050024PR China

Exploring new heterogeneous catalysts to achieve efficient C-H bond oxidation is momentous in industrial chemical ***,three Fe-incorporated polyoxometalate-encapsulated metal-organic frameworks(POM@MOFs),[Fe(H_(2)O)_(3)(dtb)][Fe(dtb)_(2)][HBW_(12)O_(40)]-12H_(2)O(1),[Fe(H_(2)O)2(dtb)]_(2)[Fe(dtb)_(2)(Hdtb)][SiW^(Ⅵ)_(9)W^(Ⅴ)_(3)O_(40)]·16H_(2)O(2),[Fe(H_(2)O)_(2)]_(4)(dtb)_(5)[PMo^(Ⅵ)_(11)Mo^(Ⅴ)O_(40)]_(2)·18H_(2)O(3),(dtb=1,4-di[4H-1,2,4-triazol-4-yl]-benzene),were hydrothermally synthesized for catalytic C-H bond *** exhibited three-dimensional(3-D)POM-based metal-organic host-guest frameworks with diverse *** compound 1,cationic metal-organic frameworks constructed by binuclear[Fe_(2)(dtb)_(6)(H_(2)O)_(2)]^(4+)clusters and dtb ligands present a pcu alpha-Po primitive cubic topological net and abundant twisted quadrangular prism-shaped cages,in which the monoprotonated[HBW_(12)O_(40)]^(4-)polyoxoanions are *** compound 2,two-dimensional(2-D)cationic metal-organic layers constructed by trinuclear[Fe_(3)(dtb)_(6)(H_(2)O)_(4)]^(6+)clusters and dtb ligands display a sql/Shubnikov tetragonal plane net topology,in which the rhomboid-shaped metal-organic windows in adjacent parallel-arranged 2-D layers are enclosed to form an open parallelepiped ***[SiW^(Ⅵ)_(9)W^(Ⅴ)_(3)O_(40)]^(7-)poly-oxoanions locate in the parallelepiped cages between 2-D *** compound 3,the 3-D cationic metal-organic frameworks constructed by binuclear[Fe_(2)(dtb)_(3)(H_(2)O)_(4)]^(4+)clusters and dtb ligands possess a bnn hexagonal BN topology,in which the hexagonal prismatic metal-organic cages accommodate four[PMo^(Ⅵ)_(11)Mo^(Ⅴ)O_(40)]^(4-)*** diphenylmethane(DPM)oxidation as C-H bond oxidation model reaction,compounds 1-3 displayed distinct catalytic activities owing to the synergistic effect of polynuclear Fe nodes and *** them,[PMo^(Ⅵ)_(11)Mo^(Ⅴ)O_(40)]^(4-)-contained compound 3 exhibited higher catalytic

关键词： Polyoxometalate Metal-organic framework Heterogeneous catalysis C-H bond oxidation

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Liquefaction structures induced by the M5.7 earthquake on May 28, 2018 in Songyuan, Jilin Province, NE China and research implication

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Journal of Palaeogeography 2020年第1期9卷 109-127页

作者： Zhu-Fu Shao Jian-Hua Zhong John Howell Bing Hao Xi-Wu Luan ze-xuan liu Wei-Min Ran Yun-Feng Zhang Hong-Qi Yuan Jing-Jing liu Liang-Tian Ni Guan-Xian Song Jin-Lin liu Wen-Xin Zhang Bing Zhao School of Geosciences Northeast Petroleum UniversityDaqing 163318Heilongjiang ProvinceChina Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina Department of Geology and Petroleum Geolog University of AberdeenAberdeen AB243UEUK School of Geosciences China University of PetroleumQingdao 266580Shandong ProvinceChina Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071Shandong ProvinceChina.

An earthquake of magnitude M5.7 occurred in Yamutu village,Songyuan City,Jilin Province,NE China(45°16′12″N/124°42′35″E)on May 28,2018,with a focal depth of 13 *** epicenter is located at the intersection of the Fuyu/Songyuan-Zhaodong Fault,Second Songhua River Fault and Fuyu North Fault which lies northwest of TanchengLujiang Fault(Tan-Lu Fault).The earthquake-induced widespread liquefaction structures and ground surface fissures within 3 km from the epicenter,caused serious disasters to the local *** visible liquefied structures include sand volcanoes,liquefied sand mounds,sand dikes and sand *** volcanoes can be divided into sand volcano with a crater,sand volcano without a crater and water volcano(no sand).Other soft-sediment deformation structures(SSDS)induced by the earthquake include deformation lamination,load and flame structures,deformation folds,dish structures,convolute bedding and water-escape *** formation process of the sand volcanoes comprises three stages:(1)building up excess pore-fluid pressure in the liquefied layer,(2)cracking of the low-permeable overlying layer,and(3)mixture of sand-water venting out of the ground *** the upward movement,the liquefied sand is injected into the low-permeable layer to form sand veins,sand sills and various types of deformation *** distribution of seismic liquefaction structure can be divided into four zones:the thoroughly liquefied zone,the lower liquefied zone with SSDS,the upper liquefied zone with SSDS,and the ground surface liquefied *** liquefaction occurred at a burial depth of 2–5 m,and the thickness of liquefied sand is 2 ***-SW(35°–215°)trending compressive stress is possibly the seismogenic trigger of the Songyuan M5.7 earthquake that caused the fault(Fuyu/Songyuan-Zhaodong Fault)to *** study of the Songyuan seismic liquefaction structures gives insight into the prediction of modern earthquakes and disasterprone ***

关键词： Earthquake Soft-sediment deformation structures Liquefaction structure Sand volcano Songyuan

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Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong xuan Ye Hongzhang Cheng Xiaoming liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

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帕瑞昔布钠超前镇痛对人工膝关节置换术后患者镇痛、炎症因子及认知功能的影响

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中国现代医学杂志 2021年第17期31卷 29-35页

作者：刘选泽肖国庆钟喜红程劲成都医学院第二附属医院(核工业四一六医院) 四川成都610041

目的探究帕瑞昔布钠超前镇痛对换膝骨关节炎人工膝关节置换患者术后镇痛、炎症因子及认知功能的影响。方法选取2017年1月—2019年9月成都医学院第二附属医院就诊的膝骨关节炎患者共100例,全部行人工膝关节置换术,随机将其分为实验组和... 详细信息

目的探究帕瑞昔布钠超前镇痛对换膝骨关节炎人工膝关节置换患者术后镇痛、炎症因子及认知功能的影响。方法选取2017年1月—2019年9月成都医学院第二附属医院就诊的膝骨关节炎患者共100例,全部行人工膝关节置换术,随机将其分为实验组和对照组,每组50例。对照组不予以任何超前镇痛,实验组麻醉前静脉注射帕瑞昔布钠40 mg,两组术后均静脉注射舒芬太尼自控镇痛。分别于术前1 h、术后6 h、术后12 h、术后24 h、术后48 h采用视觉模拟评分(VAS)进行疼痛评分;HSS膝关节功能评分法对膝关节功能进行评分;简易智力状态检查量表(MMSE)进行认知功能评分。酶联免疫吸附试验(ELISA)测定各时间点血清中IL-6、IL-10、TNF-α的表达水平。结果两组患者术后VAS评分随着时间延长逐渐降低,其中实验组在术后6 h、12 h、24 h及48 h评分与对照组比较,差异有统计学意义(P<0.05),实验组低于对照组;两组HSS膝关节评分随着时间延长逐渐升高,实验组在术后12 h、24 h及48 h评分与对照组比较,差异有统计学意义(P<0.05),实验组低于对照组;术后两组患者的IL-6、TNF-α水平均升高,但实验组在术后各时间点的水平较对照组低(P<0.05);两组患者术后IL-10水平均降低,但实验组在术后各时间点的水平较对照组高(P<0.05)。两组术后早期认知功能评分均下降,但实验组术后6 h、12 h、24 h及48 h评分较对照组高(P<0.05)。实验组的不良反应总发生率为6.0%,低于对照组的不良反应总发生率16.0%。结论帕瑞昔布钠超前镇痛对实施人工膝关节置换术的膝骨关节炎患者的术后镇痛效果良好,术后炎症因子水平降低,抗炎因子水平升高,炎症反应减少,有效保护患者认知功能,且不良反应少,可推广应用于临床。

关键词：膝骨关节炎帕瑞昔布钠超前镇痛人工膝关节置换术炎症因子认知功能

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Increased excitatory amino acid transporter 2 levels in basolateral amygdala astrocytes mediate chronic stress–induced anxiety-like behavior

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Neural Regeneration Research 2025年第6期20卷 1721-1734页

作者： Xirong Xu Shoumin xuan Shuai Chen Dan liu Qian Xiao Jie Tu Shenzhen Key Laboratory of Neuroimmunomodulation for Neurological Diseases Shenzhen-Hong Kong Institute of Brain ScienceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina CAS Key Laboratory of Brain Connectome and Manipulation Brain Cognition and Brain Disease Institute(BCBDI)Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Brain Connectome and Behavior the Brain Cognition and Brain Disease Institute(BCBDI)Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina University of Chinese of Academy of Sciences BeijingChina Faculty of Life and Health Sciences Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina

The conventional perception of astrocytes as mere supportive cells within the brain has recently been called into question by empirical evidence, which has revealed their active involvement in regulating brain function and encoding behaviors associated with ***, astrocytes in the basolateral amygdala have been found to play a role in the modulation of anxiety-like behaviors triggered by chronic stress. Nevertheless, the precise molecular mechanisms by which basolateral amygdala astrocytes regulate chronic stress–induced anxiety-like behaviors remain to be fully elucidated. In this study, we found that in a mouse model of anxiety triggered by unpredictable chronic mild stress, the expression of excitatory amino acid transporter 2 was upregulated in the basolateral amygdala. Interestingly, our findings indicate that the targeted knockdown of excitatory amino acid transporter 2 specifically within the basolateral amygdala astrocytes was able to rescue the anxiety-like behavior in mice subjected to stress. Furthermore, we found that the overexpression of excitatory amino acid transporter 2 in the basolateral amygdala, whether achieved through intracranial administration of excitatory amino acid transporter 2agonists or through injection of excitatory amino acid transporter 2-overexpressing viruses with GfaABC1D promoters, evoked anxiety-like behavior in mice. Our single-nucleus RNA sequencing analysis further confirmed that chronic stress induced an upregulation of excitatory amino acid transporter 2 specifically in astrocytes in the basolateral amygdala. Moreover, through in vivo calcium signal recordings, we found that the frequency of calcium activity in the basolateral amygdala of mice subjected to chronic stress was higher compared with normal *** knocking down the expression of excitatory amino acid transporter 2 in the basolateral amygdala, the frequency of calcium activity was not significantly increased, and anxiety-like behavior was ob

关键词： anxiety astrocytes basolateral amygdala behavior dihydrokainic acid excitatory amino acid transporter 2 fiber photometry glutamate LDN-212320 transporter

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关节镜下钢丝引导缝合联合微骨折术修复膝关节外侧半月板后根部撕裂对膝关节本体感觉的影响

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中国现代医学杂志 2021年第4期31卷 26-30页

作者：刘选泽肖国庆钟喜红程劲成都医学院第二附属医院(核工业四一六医院) 四川成都610041

目的分析关节镜下钢丝引导缝合联合微骨折术修复膝关节外侧半月板后根部撕裂对膝关节本体感觉的影响。方法选取2015年3月—2018年2月成都医学院第二附属医院收治的膝关节外侧半月板后根部撕裂患者118例作为研究对象。根据手术方式分为... 详细信息

目的分析关节镜下钢丝引导缝合联合微骨折术修复膝关节外侧半月板后根部撕裂对膝关节本体感觉的影响。方法选取2015年3月—2018年2月成都医学院第二附属医院收治的膝关节外侧半月板后根部撕裂患者118例作为研究对象。根据手术方式分为观察组60例和对照组58例。对照组行保守治疗,观察组采用关节镜下钢丝引导缝合联合微骨折术治疗。比较两组治疗前后视觉模拟评分(VAS)评分、国际膝关节评分委员会(IKDC)评分及Lysholm膝关节功能评分;分析观察组并发症发生情况。两组均接受1年随访,比较两组膝关节本体感觉测试的差值。结果观察组治疗前后VAS评分的差值高于对照组(P<0.05)。观察组治疗前后的Lysholm膝关节功能评分、IKDC评分的差值高于对照组(P<0.05)。观察组治疗前后15°、45°及75°时的膝关节本体感觉测试差值的差值低于对照组(P<0.05)。观察组与对照组并发症发生率分别为0.00%和13.79%,观察组低于对照组(P<0.05)。结论关节镜下钢丝引导缝合联合微骨折术治疗膝关节外侧半月板后根部撕裂的效果理想,有利于改善膝关节本体感觉。

关键词：撕裂伤膝关节关节镜检查骨折手术内膝关节本体感觉疾病影响状态调查

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Resolving the developmental mechanisms of cardiac microthrombosis of SARS-CoV-2 based on single-cell transcriptome analysis

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Science China Life Sciences 2025年第1期 103-115页

作者： Xizi Luo Nan Zhang Yuntao liu Beibei Du xuan Wang Tianxu Zhao Bingqiang liu Shishun Zhao Jiazhang Qiu Guoqing Wang State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Basic MedicineJilin University State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Veterinary MedicineJilin University College of Mathematics Jilin University Bioinformatic Lab School of MathematicsShandong University Department of Cardiology China-Japan Union HospitalJilin University

The coronavirus disease 2019（COVID-19） outbreak caused by the severe acute respiratory syndrome coronavirus-2（SARS-CoV-2） developed into a global health emergency. Systemic microthrombus caused by SARS-CoV-2 infection is a common complication in patients with COVID-19. Cardiac microthrombosis as a complication of SARS-CoV-2 infection is the primary cause of cardiac injury and death in patietns with severe COVID-19. In this study, we performed single-cell sequencing analysis of the right ventricular free wall tissue from healthy donors,patients who died during the hypercoagulable period of characteristic coagulation abnormality（CAC）, and patients who died during the fibrinolytic period of CAC. We collected 61,187 cells enriched in 24 immune cell subsets and 13 cardiac-resident cell subsets. We found that in the course of SARS-CoV-2 infected heart microthrombus, MYO1EhighRASGEF1Bhighmonocyte-derived macrophages promoted hyperactivation of the immune system and initiated the extrinsic coagulation pathway by activating chemokines CCL3, CCL5. This series of events is the main cause of cardiac microthrombi following SARS-CoV-2 infection. In a SARS-CoV-2 infected heart microthrombus, excessive immune activation is accompanied by an increase in cellular iron content, which in turn promotes oxidative stress and intensifies intercellular competition. This induces cells to alter their metabolic environment, resulting in increased sugar uptake via the glycosaminoglycan synthesis pathway. In addition, high levels of reactive oxygen species generated by elevated iron levels promote increased endogenous malondialdehyde synthesis in a subpopulation of cardiac endothelial cells. This exacerbates endothelial cell dysfunction and exacerbates the coagulopathy process.

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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self-Powered Motion Sensing

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Wang, Yu-ze Wang, Yu-Chang liu, Ting-Ting Zhao, Quan-Liang Li, Chen-Sha Cao, Mao-Sheng Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China North China Univ Technol Sch Mech & Mat Engn Beijing 100144 Peoples R China Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China

Polymeric microwave actuators combining tissue-like softness with programmable microwave-responsive deformation hold great promise for mobile intelligent devices and bionic soft robots. However, their application is challenged by restricted electromagnetic sensitivity and intricate sensing coupling. In this study, a sensitized polymeric microwave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx (MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique space-charge polarization and interfacial polarization, resulting in significant improvements of 230% in the dielectric loss factor and 830% in the apparent efficiency of electromagnetic energy harvest. The sensitized microwave actuation demonstrates as the shortened response time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (up to 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combines driving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of similar to 3 mV) during actuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approach for developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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汉语作为方法:从早期文字记录看汉语诗学的当代价值

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河北学刊 2025年第1期45卷 67-73页

作者：张晶刘璇中国传媒大学辽宁师范大学文学院

汉语兼具“文”与“言”的双重属性,与以“言”为主的印欧语相区别。语法与逻辑的同根同源使印欧语在理论表述中陷入了概念与经验的争执,而汉语贯通形而上与形而下的特质使汉语表述本身即构成一种方法。作为“道”之文的载体,中国早期... 详细信息

汉语兼具“文”与“言”的双重属性,与以“言”为主的印欧语相区别。语法与逻辑的同根同源使印欧语在理论表述中陷入了概念与经验的争执,而汉语贯通形而上与形而下的特质使汉语表述本身即构成一种方法。作为“道”之文的载体,中国早期记录及其文法结构提供了关键信息,甲骨卜辞的体例制式为“易”类文献的结构提供了可追溯的原型,也为探索“论出于易”对汉语诗学功能的塑造提供了重要线索。其中,干支配伍的宇宙纪日为“以时系事”的话语表述提供了超线性时空结构;“正反对贞”以对言的形式表现语义的动态平衡与赋形必变的道理;“主题+阐释”的体例结构以逐层累积的文本层次为断言的疑难提供了积极的方案。汉语文法能够在表述判断的同时保持对“变”的关切,这为建构既能规范描述艺术经验又能直面人类自身处境的理论话语提供了时代价值。

关键词：汉语早期文字记录文法结构汉语诗学当代价值

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Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan Zhang Xingyu Zhou Qian Wang Changyu liu Yangyang liu Hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

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