检索结果-南通市图书馆

Journal of Rare Earths 2024年第2期42卷 286-292,I0003页

作者： Hong Cui Yanli Yang Xue Bai Xu Han Wensha Zhang Ying Lu shuxia liu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of the Ministry of Education College of ChemistryNortheast Normal UniversityChangchun 130024China

Four rare earth inorganic-organic hybrid compounds based on Keggin-type polyoxometalate {SiW_(12)}with general formula [{RE(DMF)_(4)(H_(2)O)_4RE(DMF)_(6)}_(2){SiW_(12)O_(40)}_(3)](RE = La(1),Pr(2),Sm(3),Eu(4),DMF=N,N-dimethylformamide) were synthesized by the conventional solution *** analyses indicate that four compounds are isostructural and are all built from three [SiW_(12)O_(40)]^(4-) polyoxoanions and DMF ligands linked by RE^(3+).Compounds 1-4 are extremely sensitive to UV light and present excellent photochromic properties,in which the coloring and fading time of samples are both no more than 2 min,and the reversible coloring-fading process can be repeated for at least 10 cycles with little fatigue,suggesting that compounds 1-4 can be a series of fast-responsive and durable photochromic ***,the solid-state photoluminescence spectra of compounds 3(Sm) and 4(Eu)display strong characteristic emissions of rare earth ions based on f-f ***,compound4(Eu) has a longer fluorescence lifetime up to 566.74 μ***,co mpounds 3(Sm) and 4(Eu) exhibit the switchable luminescence behavior induced by photochromism,which allows them to be used as potential molecular switches.

关键词： Inorganic-organic hybrid Keggin-type polyoxometalates Rare earths Photochromism Photoluminescence

Polyoxometalate-based flexible conductive materials with superionic conductivity

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第10期67卷 3299-3309页

作者： Yuxin Wang Shuping Xue Jun Geng Ying Lu Teng Li Xiaozheng Duan Xue Bai Yanli Yang Jingqi Yang shuxia liu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education College of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Flexible ion-conductive materials exhibit intriguing advantages for applications in flexible electronic ***,the further enhancement of their conductivity within environmental limitations is an urgent demand for the development of flexible electronic devices,yet remains as a great ***,we report a“dual-acid”strategy,via the encapsulation of two acids,H_(3)PW_(12)O_(40)(HPW) and NH_(2)SO_(3)H(SA),with synergistic interaction into poly(vinyl alcohol)-glycerol(PVA-Gly) hydrogel,to achieve polyoxometalate(POM)-based flexible materials with superionic conductivity under various environmental *** a representative example,the prepared PVA-Gly/HPW-SA-20% hydrogel presents an ultrahigh proton conductivity ranging from -30℃(3.33×10^(-2)S cm^(-1)) to room temperature(2.78×10^(-1)S cm^(-1)) under ambient ***,the PVA-Gly/HPW-SA-20% hydrogel exhibits remarkable advantages in anti-freezing,mechanical flexibility and self-adhesiveness,making it a promising multifunctional electrolyte for flexible electronic *** experimental results and molecular dynamics(MD) simulations jointly demonstrate that SA bridges HPW clusters to form a dense proton transport pathway induced by multiple electrostatic and hydrogen bonding interactions between SA and HPW counterparts,which contributes to the high-level proton conductivity of the PVA-Gly/HPW-SA-20% *** work provides new insights into the design of POM-based flexible materials with superionic conductivity.

关键词： polyoxometalates proton conduction dual-acid effect hydrogel molecular dynamics simulation

Inorganic-organic hybrids constructed of bis(undecatungstogermanate)lanthanates polyoxoanions and oxalate-bridged dinuclear copper complexes and their magnetic properties

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第22期56卷 2331-2336页

作者： SUN Ping MA FengJi liu shuxia Key Laboratory of Polyoxometalates Science of Ministry of Education College of Chemistry Northeast Normal University Changchun 130024China

A series of inorganic-organic hybrids K2NamH9-m[{Ln(GeW11O39)2}{Cu2(bpy)2(μ-ox)}]·nH2O(bpy=2,2-bipyridine and ox= oxalate;Ln=La,Nd,Sm,Eu,Gd;n=19,17,22,20,19;m=4,4,4,9,2)were isolated after reacting in a potassium acetate buffer.X-ray structural analyses show that compounds 1-5 are isomorphic and consist of[Ln(GeW11O39)2] 13-polyoxoanion building blocks and oxalate-bridged dinuclear copper metalorganic complex with a 1D chain *** 1D chain further connects into the 3D framework byπ-πinteractions with neighboring bpy *** magnetic susceptibility data indicate that anti-ferromagnetic coupling between the neighboring Cu2+ions in the structure and the rare earth ions affects magnetic property of the structure.

关键词：双核铜配合物混合动力汽车草酸根桥磁学性质无机稀土离子金属复合物联吡啶

恩替卡韦与富马酸替诺福韦酯治疗对慢性乙型肝炎患者肾功能的影响

在线全文

学校读者我要写书评

暂无评论

中华保健医学杂志 2024年第4期26卷 477-480页

作者：张秀彬刘淑霞刘宁保定市第四中心医院感染科 072350 正定县人民医院内科保定市第一中心医院神经内科

目的观察无明显肾功能损害慢性乙型肝炎(chronic hepatitis B,CHB)患者采用恩替卡韦(entecavir, ETV)、富马酸替诺福韦酯(tenofovir disoproxil fumarate, TDF)单药治疗对肾功能的影响。方法选取保定市第四中心医院2020年1月~2021年1... 详细信息

目的观察无明显肾功能损害慢性乙型肝炎(chronic hepatitis B,CHB)患者采用恩替卡韦(entecavir, ETV)、富马酸替诺福韦酯(tenofovir disoproxil fumarate, TDF)单药治疗对肾功能的影响。方法选取保定市第四中心医院2020年1月~2021年12月接受抗病毒治疗的CHB患者,根据患者基线肾小球滤过率估计值(estimated glomerular filtration rate, EGFR)水平分为eGFR> 90 ml/(min·1.73 m^(2))组(n=79)和60~90 ml/(min·1.73 m^(2))组(n=38),分别比较ETV和TDF治疗效果,并对治疗24和48周后的肾小球滤过率eGFR、尿视黄醇结合蛋白(retinol-binding protein, RBP)、α1微球蛋白(α1-microglobulin, α1-MG)和β2微球蛋白(β2-microglobulin, β2-MG)进行比较。结果治疗前,eGFR> 90 ml/(min·1.73 m^(2))组和60~90 ml/(min·1.73 m^(2))组患者血清谷丙转氨酶(ALT)、乙型肝炎病毒表面抗原(HBSAG)、乙型肝炎病毒(HBV)DNA差异无统计学意义(P> 0.05)。治疗后,eGFR> 90 ml/(min·1.73 m^(2))组和60~90 ml/(min·1.73 m^(2))组不同治疗用药患者患者ALT、HBsAg均下降,与治疗前比较,差异有统计学意义(t=12.234、10.313、3.802、3.604,9.431、7.419、3.508、4.147,P 0.05)。入组时两组eGFR、尿RBP、α1-MG和β2-MG比较,差异无统计学意义(P> 0.05)。治疗24和48周后,两组组间eGFR、尿RBP、β2-MG差异及与入组时比较差异均无统计学意义(P> 0.05)。eGFR> 90 ml/(min·1.73 m^(2))患者治疗前后及ETV、TDF治疗24周、48周后α1-MG差异无统计学意义(P> 0.05),eGFR60~90 ml/(min·1.73 m^(2))患者24周后α1-MG差异无统计学意义(P> 0.05),48周后TDF组α1-MG高于ETV组也高于入组时,差异有统计学意义(t=2.169、2.859,P<0.05)。结论恩替卡韦与替诺福韦酯均可有效抑制慢性乙型肝炎患者HBV DNA复制,对于eGFR <90 ml/(min·1.73 m^(2))患者,建议选择恩替卡韦以减少对肾小管的早期损伤。

关键词：恩替卡韦替诺福韦酯慢性乙型肝炎肾功能

Straightforward construction of hollow polyoxometalate-based metal-organic framework via pseudo-homoepitaxial growth

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2022年第10期65卷 1921-1928页

作者： Zhong Zhang Xujiao Ma Xu Han Hong Cui Ying Lu shuxia liu Yiwei liu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education College of ChemistryNortheast Normal UniversityChangchun 130024China Zhang Dayu School of Chemistry Dalian University of TechnologyDalian 116024China

Hollow structures are significant for shortening diffusion path and promoting active center ***-crystalline hollow polyoxometalate-based metal-organic frameworks(POM@MOFs)with increased adsorption performance and catalytic activity were synthesized through a straightforward pseudo-homoepitaxial growth strategy within only 1.5 *** strategy ingeniously exploits favorable characteristics of well-matched lattice/structure but acid stability difference between MOF and POM@MOF to construct a pseudo-homoepitaxial ***,the MOF single crystals are used as seeds to perform epitaxial growth of the lattice/structure-matched POM@MOF under appropriate ***,the MOF seeds collapse spontaneously during epitaxial growth,affording regular hollow POM@MOF single *** the acid stability of the POM@MOF is much higher than that of the MOF,it is speculated that the hollow structure formation may be related to the acid released from the epitaxial POM@MOF *** the pseudo-homoepitaxial POM@MOF growth strategy based on structural matching but stability difference avoids additional template removal process in conventional hollow MOF preparation and ensures hollow single crystal construction.

关键词： polyoxometalate-based metal-organic framework pseudo-homoepitaxial growth hollow structure single crystals etching

Recent progress in C-N coupling for electrochemical CO_(2) reduction with inorganic nitrogenous species in aqueous solution

在线全文

学校读者我要写书评

暂无评论

Materials Reports(Energy) 2023年第1期3卷 65-77,I0003页

作者： shuxia liu Tanyuan Wang Lior Elbaz Qing Li State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan UniversityRamat-Gan5290002Israel

The electrocatalytic CO_(2) reduction in aqueous solution mainly involves bond cleavage and formation between C,H and O,and it is highly desirable to expand the bond formation reaction of C with other atoms to obtain novel and valuable *** electrochemical synthesis of N-containing organic chemicals in electrocatalytic CO_(2) reduction via introducing N sources is an effective strategy to expand the product scope,since chemicals con-taining C–N bonds(*** and amines)are important reactants/products for medicine,agriculture and *** article focuses on the research progress of C–N coupling from CO_(2) and inorganic nitrogenous species in aqueous ***,the reaction pathways related to the reaction intermediates for urea,formamide,acetamide,methylamine and ethylamine are ***,the electrocatalytic performance of different catalysts for these several N-containing products are summarized and ***,the challenges and op-portunities are analyzed,aiming to provide general insights into future research directions for electrocatalytic C–N coupling.

关键词： CO_(2) reduction C-N coupling Heterogeneous electrocatalysis Amide Amine

A Class of Association Schemes and Their Automorphisms

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra Colloquium 2022年第3期29卷 361-374页

作者： Changli Ma shuxia liu Yanan Feng Yang Zhang Liwei Zeng School of Mathematical Sciences Hebei Normal UniversityShijiazhuang 050024China Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043China School of Mathematical Sciences Hebei Normal University Shijiazhuang 050024China

In this paper,we construct a class of association schemes by using pairs of subspaces of vector spaces and determine their full automorphism groups.

关键词： association scheme automorphism relation graph

Effect of TiO_2 nanoparticle aggregation on marine microalgae Isochrysis galbana

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2018年第4期30卷 208-215页

作者： Ji Hu Jianmin Wang shuxia liu Zhechao Zhang Haifeng Zhang Xiaoxia Cai Jianming Pan Jingjing liu The Second Institute of Oceanography State Oceanic Administration Laboratory of Ecosystem and BiogeochemistryState Oceanic Administration Department of Civil Architectural and Environmental Engineering Missouri University of Science and Technology Ocean College Zhejiang University

TiO2 nanoparticles（NPs） could adversely impact aquatic ecosystems. However, the aggregation of these NPs could attenuate this effect. In this work, the biological effects of TiO2 NPs on a marine microalgae Isochrysis galbana were investigated. The aggregation kinetics of TiO2 NPs under different conditions was also investigated to determine and understand these effects. Results showed that, though TiO2 NPs had no obvious impact on the size and reproducibility of algal cells under testing conditions, they caused a negative effect on algal chlorophyll, which led to a reduction in photosynthesis. Furthermore, fast aggregation of TiO2 NPs occurred under all conditions, especially at the pH close to the p Hzpc. Increasing ionic strength and NP concentration also enhanced the aggregation *** aggregation and the following sedimentation of TiO2 NPs reduced their adverse effects on I. galbana.

关键词： Titanium dioxide Nanoparticles Aggregation Marine microalgae Ecotoxicity

长期不同施氮量下黑土团聚体稳定性及有机碳含量的变化

在线全文

学校读者我要写书评

暂无评论

农业环境科学学报 2024年第1期43卷 102-110页

作者：姚俊红武俊男王呈玉崔炎田高云航孙嘉璐刘淑霞吉林农业大学资源与环境学院长春130118 吉林省商品粮基地土壤资源可持续利用重点实验室长春130118 吉林省农业科学院农业资源与环境研究所长春130033 吉林农业大学动物科技学院长春130118

为测定不同氮肥施用量对黑土团聚体组成及稳定性、有机碳含量及团聚体有机碳分布的影响,阐明黑土有机碳稳定性对不同施氮水平的响应机制,本研究在吉林省梨树县不同施氮水平长期定位试验田进行取样,以施氮水平不同设置5个处理,分别为T1(0... 详细信息

为测定不同氮肥施用量对黑土团聚体组成及稳定性、有机碳含量及团聚体有机碳分布的影响,阐明黑土有机碳稳定性对不同施氮水平的响应机制,本研究在吉林省梨树县不同施氮水平长期定位试验田进行取样,以施氮水平不同设置5个处理,分别为T1(0)、T2(160 kg·hm^(-2))、T3(240 kg·hm^(-2))、T4(280 kg·hm^(-2))、T5(320 kg·hm^(-2)),分析长期不同施氮量下水稳性团聚体组成、团聚体结构特征、土壤总有机碳含量及团聚体有机碳分布的变化,探究酸化黑土有机碳含量影响特征。结果表明:随氮肥施用水平的升高,土壤碱解氮(AN)和全氮(TN)含量先增后减,T3处理含量最高,AN和TN分别比T1处理高24.90%、10.28%;土壤速效磷(AP)的含量呈下降趋势。随氮肥用量的提高,土壤团聚体呈现大粒径团聚体向小粒径团聚体转变的趋势,>2 mm粒径团聚体下降14.55%。土壤有机碳总量随施氮水平的提高呈先增后减的趋势,施氮量为280 kg·hm^(-2)有机碳含量最高;>2 mm和2~0.25 mm粒径团聚体有机碳含量较高;不同施氮水平下有机碳含量与团聚体稳定性特征的几何平均直径、土壤团聚体破坏率、不稳定团粒指数和土壤化学性质的相关度较高。研究表明:通过13 a连续施入不同水平氮肥,土壤有机碳含量随氮肥施用量的增加呈先增后减的趋势;氮肥施用量增加会显著降低土壤pH,土壤团聚体有机碳主要分布在2~0.25 mm粒径中。

关键词：氮肥施用量黑土土壤理化性质团聚体有机碳团聚体稳定性

维普期刊数据库博看期刊

基于叙事理念的护理干预在甲状腺癌手术患者中的应用及对依从性的影响

在线全文

学校读者我要写书评

暂无评论

中国医学创新 2024年第19期21卷 90-94页

作者：范若乔刘淑霞穆守平合肥市第二人民医院普外科安徽合肥230011

目的:探讨基于叙事理念的护理干预在甲状腺癌手术患者中的应用及对依从性的影响。方法:选取合肥市第二人民医院2021年6月—2023年6月收治的120例甲状腺癌手术患者进行回顾性研究,以护理方式的不同分组。对照组(n=60)进行基础常规护理干... 详细信息

目的:探讨基于叙事理念的护理干预在甲状腺癌手术患者中的应用及对依从性的影响。方法:选取合肥市第二人民医院2021年6月—2023年6月收治的120例甲状腺癌手术患者进行回顾性研究,以护理方式的不同分组。对照组(n=60)进行基础常规护理干预,观察组(n=60)在对照组基础上接受基于叙事理念的护理干预。比较两组满意度、依从性、并发症发生率、生活质量。结果:观察组患者满意度评分高于对照组(P<0.05)。观察组依从性良好率(96.67%)高于对照组(70.00%),依从性差率(1.67%)低于对照组(15.00%),差异均有统计学意义(P<0.05)。观察组总并发症发生率低于对照组(P<0.05)。干预后观察组焦虑自评量表(SAS)评分低于对照组,生活质量评分高于对照组(P<0.05)。结论:甲状腺癌患者接受手术治疗过程中给予基于叙事理念的护理干预,能提升其依从性和满意度,利于术后恢复,有效提高生活质量,减轻焦虑情绪。

关键词：甲状腺癌手术叙事理念护理依从性