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Chinese Chemical Letters 2024年第3期35卷 528-531页

作者： Haiying Wang Han Xu Chaolong Chen Yingjie Zhu Yikang zhang dongdi zhang Jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Molecular SciencesHenan UniversityKaifeng 475004China School of Pharmaceutical Science&Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical UniversityKunming 650500China Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid Surface and Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Two 3d-4f-5d heterometallic cluster-containing polyoxometalates,formulated as Na_(22){(SbW_(9)O_(33))_(4)[La_(3)W_(6)MO_(18)(H_(2)O)_(8)(CH_(3)COO)_(4)]_(2)}·nH_(2)O(abbreviated as La_(6)M_(2),M=Co/Mn)were synthesized and structurally ***-crystal X-ray diffraction analyses reveal that the polyanions of La_(6)Co_(2)and La_(6)Mn_(2)consist of the uncommon 3d-4f-5d clusters{La_(6)W_(12)Co_(2)}and{La_(6)W_(12)Mn_(2)},which are encapsulated by four trilacunary Keggin tungstoantimonates to form the parallelogram-shaped title ***,the polyanions can be extended into a two-dimensional(2D)frame by the linkage of peripheral Na+*** inner space of the 2D layer was filled with water molecules and thus an H-bonded network was formed,which is expected to exhibit a fascinating proton *** study of water-assisted proton conduction demonstrated that La_(6)Co_(2)and La_(6)Mn_(2)were temperature-and humiditydependent proton conductors,respectively,and the proton conductivities could reach 1.3×10^(-2)and 2.3×10^(-2)S/cm at 65℃and 90%RH conditions.

关键词： Polyoxometalate Parallelogram Heterometallic 3d-4f-5d cluster Proton conductivity

Bouquet-like uranium-containing selenotungstate consisting of two different Keggin-/Anderson-type units with excellent photoluminescence quantum yield

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Chinese Chemical Letters 2023年第1期34卷 198-202页

作者： Mengyuan Cheng Haiying Wang Yufeng Liu Jingwen Shi Mingqi Zhou Weixin Du dongdi zhang Guoping Yang Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang 330013China

We present the synthesis,characterization and photoluminescence properties of uranium-containing selenotungstate,[(UO_(2))_(3)(SeO_(3))_(3)Na_(5)(H_(2)O)_(6)(SeW_(6)O_(21))(SeW_(9)O_(33))_(3)]^(21–),which was isolated by a one-pot reaction of uranium nitrate with sodium tungstate and sodium selenite in a pH 5.2 aqueous solution at 90°*** this study,the effect of the introduction of lone-electron pair containing heteroatoms on the structure is demonstrated,a three-layered heterometallic{Se_(3)U_(3)Na_(5)}cluster is encapsulated by two different anionic building block units:three trivacant Keggin{B-α-Se W_(9)O_(33)}and one Anderson{SeW_(6)O_(21)}.To our knowledge,the{Se_(3)U_(3)Na_(5)}cluster has never been observed in the polyoxometalate *** solidstate photoluminescence properties and lifetime decay behaviours of the title compound(1)have been measured at room temperature,and the photoluminescence spectrum displays the characteristic emission bands of corresponding uranyl *** addition,the photoluminescence quantum yield of 1 is 72%,which is almost three times that of starting material UO_(2)(NO_(3))_(2)·6H_(2)O(27%).By using this strategy,we envision that an increasing number of assemblies with‘open’clusters may be designed and obtained,in which the exposed oxygen atoms show strong affinity towards metal ions,providing new opportunities to generate bigger clusters or to tune existing properties.

关键词： Polyoxometalates Selenotungstates Uranium Synthesis Photoluminescence

Two Dawson-type U(Ⅵ)-containing selenotungstates with sandwich structure and its high-efficiency catalysis for pyrazoles

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Chinese Chemical Letters 2022年第8期33卷 3899-3902页

作者： Mengyuan Cheng Yufeng Liu Weixin Du Jingwen Shi Junhua Li Haiying Wang Ke Li Guoping Yang dongdi zhang Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang 330013China

Two novel uranium-containing selenotungstates Na_(3)[H_(19)(UO_(2))_(2)(μ_(2)-O)(Se_(2)W_(14)O_(52))_(2)]·41 H_(2)O(U_(2))and(NH_(4))_(10)[H_(4)(SeO)_(2)(UO_(2))_(2)(H_(2)O)_(2)(H_(2)Se_(2)W_(14)O_(52))(Se_(2)W_(14)O_(52))]·66 H_(2)O(Se_(2)U_(2))based on the{Se_(2)W_(14)O_(52)}unit were successfully prepared and fully *** our knowledge,the uranium is firstly introduced into the ***,it is notable that U_(2)exhibits excellent Lewis acid-base catalytic activities in the condensation cyclization of sulfonyl hydrazides with diketones to synthesize polysubstituted *** the desired products were obtained in moderate to good yields(up to 99%).

关键词： Selenotungstates Uranium Dawson-type Condensation reaction Pyrazoles

A new bicapping Keggin-type heteropolyoxoniobates

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A new bicapping Keggin-type heteropolyoxoniobates

1.0mm铝合金薄板微计算机控制联合交流等离子弧焊接(***)研究

中国化学会第九届全国无机化学学术会议

作者： Zhijie Liang Haiying Wang dongdi zhang Jingyang Niu Key Laboratory of Polyoxometalate Chemistry of Henan Province College of Chemistry and Chemical Engineering Henan University

Polyoxoniobates attract extensive interest owing to their structural diversities and potential applications. A new organic–inorganic hybrid Sb Ⅲ-bicapped Keggin heteropolyoxoniobate[Ni（en）2（H2O）2]2[Ni（H2O）6]2[HPNb12Sb2O40]·28H2O（1） is synthesized by hydrothermal method, which is characterized by X-ray powder diffraction, IR and UV spectra and single-crystal X-ray diffraction. Single-crystal X-ray structural analysis shows that compound 1 consists of a bicapped {PNb12O40Sb2} Keggin polyanion and nickel-complexes as the counter-cations. The [PNb12O40Sb2]9– polyanion can be regarded as a decorated Keggin cluster with one phosphorous atom as the heteroatom center and two antimony atoms capping two opposite *** caps are formed by the ligation of the oxygen atoms on the two opposite {Nb4O4} faces to each Sb atom,leading to distorted square pyramidal coordination geometry. Further, the photocatalytic activity of 1 for H2 evolution was also evaluated.

关键词： Heteropolyoxoniobate Keggin Sb-bicapped photocatalysis

来源： cnki会议评论

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哈尔滨工业大学学报 1985年第S3期 142-147页

作者：张修智张冬弟哈尔滨工业大学焊接教研室

1981年、焊接教研室提出了一种利用交流等离子弧焊接铝合金的新方法(***)[4]。在上述基础上,本文研制了微计算机控制的联合交流等离子弧焊接系统。对新的焊接主回路,硬件和软件进行了开发,并成功地进行了工艺试验。

关键词：等离子弧焊接 AC.CPAW 铝合金薄板微计算机控制导通角

一例Wells-Dawson型铌钨混配多酸的合成及光催化性能（英文）

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化学研究 2014年第6期25卷 570-572,578页

作者：梁志结李龙升胡晓静张东娣河南省多酸化学重点实验室河南大学化学化工学院河南开封475004

在双氧水存在条件下,合成了一例Wells-Dawson型铌钨混配多酸K3.5Na4[H4.5(NbO2)6P2W12O5 6]·12.5H2O(1),X射线单晶结构分析表明,化合物1的多阴离子是一个六过氧铌基团取代的P2W12衍生物.六个铌原子分别与五个来自多酸框架上的氧原子和... 详细信息

在双氧水存在条件下,合成了一例Wells-Dawson型铌钨混配多酸K3.5Na4[H4.5(NbO2)6P2W12O5 6]·12.5H2O(1),X射线单晶结构分析表明,化合物1的多阴离子是一个六过氧铌基团取代的P2W12衍生物.六个铌原子分别与五个来自多酸框架上的氧原子和一个端位的过氧单元配位.另外,对化合物1的光催化产氢性能进行了初步研究.

关键词：混配型多酸 Wells-Dawson 铌光催化

一例Keggin型钒铌氧簇过渡金属衍生物的合成及结构

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化学研究 2018年第5期29卷 455-459页

作者：李晨赵东燕钱盈静马鹏涛张东娣河南省多酸化学重点实验室河南大学化学化工学院河南开封475004

采用水热法合成一例有机-无机杂化的Keggin型多酸-钒铌氧簇过渡金属衍生物Na2H{[Cu(dap)2]4[VNb12O40(VO)2]}·6H2O(dap=1,2-丙二胺)(1).通过X射线单晶衍射分析、傅立叶红外光谱分析、粉末衍射分析对其结构进行表征. X射线单晶衍射结果... 详细信息

采用水热法合成一例有机-无机杂化的Keggin型多酸-钒铌氧簇过渡金属衍生物Na2H{[Cu(dap)2]4[VNb12O40(VO)2]}·6H2O(dap=1,2-丙二胺)(1).通过X射线单晶衍射分析、傅立叶红外光谱分析、粉末衍射分析对其结构进行表征. X射线单晶衍射结果表明,化合物1属正交晶系,I4/mcm空间群;晶胞参数为a=26. 441 2(13) nm,b=26. 441 2(13) nm,c=27. 601 9(19) nm.化合物1是由一个Keggin型多阴离子{[Cu(dap)2]4[VNb12O40(VO)2]}3-、两个Na+、一个H+、和六个结晶水组成的.

关键词：多酸钒铌氧簇有机-无机杂化结构

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指导大学生创新性实验项目的思考

广东化工 2016年第14期43卷 267-268页

作者：王海瑛赵淑芳王亚亚李静张东娣河南大学化学化工学院河南开封475004

通过总结一项2013年国家级大学生创新项目,即新型铌取代多酸的合成及性质研究。通过项目实施不仅巩固了理论教学效果、培养了学生的实践和创新能力,提高了学生的综合素质,调动了大学生参与科研的积极性和创造性,提高了学生专业论文写作... 详细信息

通过总结一项2013年国家级大学生创新项目,即新型铌取代多酸的合成及性质研究。通过项目实施不仅巩固了理论教学效果、培养了学生的实践和创新能力,提高了学生的综合素质,调动了大学生参与科研的积极性和创造性,提高了学生专业论文写作能力、独立开展实验的能力以及解决问题的能力,同时提升了学生的团队协作精神。

关键词：大学生创新性实验项目教学改革

High-ductility fine-grained Mg-1.92Zn-0.34Y alloy fabricated by semisolid and then hot extrusion

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Journal of Magnesium and Alloys 2023年第2期11卷 533-542页

作者： Qi Zeng Yingbo zhang Kangning Li Ye Zhuang Jiaheng Li Yong JYuan dongdi Yin School of Materials Science and Engineering Southwest Jiaotong UniversityNo.111North 1st Section of SecChengduSichuan 610031China Weichai Power Co. Fushou East StreetHigh-Tech Development ZoneWeifang 261061China

The combination of semisolid and hot extrusion processing was applied to refine the icosahedral quasicrystalline phase(I-phase) in an extruded Mg-1.92Zn-0.34Y(wt.%) alloy for the first time. The semisolid isothermal heat treatment transformed the micron-sized I-phase particles into nano lamellar eutectic(α-Mg + I-phase) with a lamellar spacing of ?86 nm. After subsequent hot extrusion at 250 ℃, the nano lamellar eutectic phases were broken into uniformly dispersed nanoscale I-phase particles. What’s more, the matrix microstructure was significantly refined with an equiaxed average grain size of 2.59 ± 0.81 μm, and an unusual texture component(most of the grains’ c-axis is parallel to the extrusion direction) was observed. The processed alloy exhibited a high tensile elongation to failure(EL) of 44 ± 2.6%with an ultimate tensile strength(UTS) of 258 ± 2.0 MPa and a tensile yield strength(TYS) of 176 ± 1.6 MPa at room *** high ductility from the combined effects of the grain refinement, dispersion of nanoscale I-phase particles, and the unusual *** uniform dispersion of nanoscale I-phase particles could promote grain refinement by particle stimulated nucleation mechanism, and thus bring the unusual texture(where the c-axis is aligned parallel to the extrusion direction during dynamic recrystallization, which contributed to ductility).

关键词： High ductility Unusual texture Nanoscale I-phase particle Microstructure

Anisotropic cyclic deformation behavior of an extruded Mg-3Y alloy sheet with rare earth texture

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Journal of Magnesium and Alloys 2022年第6期10卷 1581-1597页

作者： Tianjiao Li Jinsong Rao Jiang Zheng dongdi Yin Haoge Shou Yongfa zhang Rong Shi Weichao Jing Lihong Xia International Joint Laboratory for Light Alloys(Ministry of Education) College of Materials Science and EngineeringChongqing University174 Shazhengjie StreetShapingba DistrictChongqing 400044China Shenyang National Laboratory for Materials Science Chongqing UniversityChongqing 400044China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduSichuan 610031China College of Mechanical Engineering Chongqing Technology and Business UniversityChongqing 400067China

Mg-RE(magnesium-rare earth)alloys exhibit pronounced in-plane anisotropy of mechanical response under quasi-static monotonic loading resulting from the RE texture,as extensively *** this work,an obvious in-plane anisotropy of cyclic deformation behavior was observed in an extruded Mg-3Y alloy sheet during strain-controlled tension-compression low-cycle fatigue(LCF)at room *** extrusion direction(ED)samples displayed better fatigue resistance with almost symmetrical hysteresis loops and longer fatigue life compared with the transverse direction(TD)*** influences of texture on the deformation modes,cracking modes,and mechanical behavior of Mg-Y alloy sheets under cyclic loading were studied quantitatively and *** activation of various slip/twinning-detwinning systems was measured at desired fatigue stages via EBSD observations together with in-grain misorientation axes(IGMA)*** results indicate that the activation of deformation modes in the TD sample was featured by the cyclic transition,i.e.,prismatic slip(at the tensile interval)→{10–12}tension twinning(at the compressive reversal)→detwinning+prismatic slip(at the re-tensile reversal).In the case of the ED sample,the cyclic deformation was dominated by the basal slip throughout the fatigue *** cracking modes,intergranular cracking and persistent slip bands(PSB)cracking were the primary cracking modes in the ED sample while the TD sample showed a high tendency of{10–12}tension twinning cracking(TTW cracking).The underlying mechanisms influencing the activation of various slip/twinning-detwinning systems,as well as cracking modes and cyclic mechanical behavior,were discussed.

关键词： Anisotropic cyclic deformation Dislocation slip Twinning-detwinning Cracking modes Mechanical behavior