二维层状钒氧化合物Co(bpy)(H2O)V2O6的水热合成和晶体结构

采用水热合成法合成了组成为Co(bpy)(H2O)V2O6(bpy=bipyridine)的钒氧化合物,并用红外光谱、元素分析和单晶X-射线衍射等手段对其进行了表征.结果表明:化合物的晶体属于正交晶系,Pca21空间群,a=0.922 3(10)nm,b=1.054 8(12)nm,c=1.439 7(16)nm,V=1.401(3)nm3,Z=4,R1=0.016 4.单晶结构解析表明,化合物具有由钒-氧锯齿链{V2O6}2nn-和n个Co(bpy)(H2O)2 单元通过氧原子共价连接而形成的二维层状结构.     

吡啶钌的Keggin结构杂多钨酸盐的合成及表征

合成了两种联吡啶钌的Keggin结构杂多钨酸盐，[Ru(bipy)3]2[SiW12O40]2C2H5OH8H2O,[Ru(bIPY)3]2[GeW12O40]4C2H5OH4H2O；并通过元素分析、UV-Vis光谱、IR光谱、^1HNMR谱、热重分析对所合成化合物进行了表征，它们在可见区有较强的吸收，其吸收起始于750nm附近。     

Na_3H_3[C_4FN_3OH_4]_6[TeMo_6O_(24)]·8H_2O和Na_2H[C_4FN_3OH_4]_2[Al(OH)_6Mo_6O_(18)]·13H_2O的合成与晶体结构

采用常规方法合成了2个Anderson型多金属氧酸盐Na3H3[C4FN3OH4]6[TeMo6O24].8H2O(Ⅰ)和Na2H[C4FN3OH4]2[Al(OH)6Mo6O18].13H2O(Ⅱ).通过元素分析、红外光谱、热重分析、X射线单晶衍射对其进行了表征.结果表明:2个化合物均属于三斜晶系,P-1空间群;化合物Ⅰ的晶胞参数a=1.106 91(10)nm,b=1.148 99(10)nm,c=1.358 07(12)nm,α=71.63(2)°,β=66.25(10)°,γ=67.44(2)°,V=1.433 4(2)nm3,Z=1,R1=0.074 8,wR2=0.127 9;化合物Ⅱ的晶胞参数a=0.687 88(4)nm,b=1.168 45(7)nm,c=1.306 90(8)nm,α=81.339 0(10)°,β=77.890 0(10)°,γ=79.548 0(10)°,V=1.003 07(10)nm3,Z=1,R1=0.031 4,wR2=0.099 5.     

Na3H3[C4FN3OH4]6[TeMo6O24]·8H2O和Na2H[C4FN3OH4]2[Al(OH)6Mo6O18]·13H2O的合成与晶体结构

采用常规方法合成了2 个Anderson型多金属氧酸盐Na3H3[C4FN3OH4]6[TeMo6O24]·8H2O(Ⅰ) 和Na2H[C4FN3OH4]2[Al(OH)6Mo6O18]·13H2O(Ⅱ).通过元素分析、红外光谱、热重分析、X射线单晶衍射对其进行了表征.结果表明:2个化合物均属于三斜晶系,P-1空间群;化合物Ⅰ的晶胞参数a=1.106 91(10) nm,b=1.148 99(10) nm,c=1.358 07(12) nm,α=71.63(2)°,β=66.25(10)°,γ=67.44(2)°,V=1.433 4(2) nm3,Z=1,R1=0.074 8,wR2=0.127 9;化合物Ⅱ的晶胞参数a=0.687 88(4) nm,b=1.168 45(7) nm,c=1.306 90(8) nm,α=81.339 0(10)°,β=77.890 0(10)°,γ=79.548 0(10)°,V=1.003 07(10) nm3,Z=1,R1=0.031 4,wR2=0.099 5.     

超分子化合物[HN(C_2H_5)_3]_2H[PW_(12)O_(40)]·4H_2O的水热合成、晶体结构及电化学性质

利用中温水热技术合成了新型超分子化合物[HN(C2H5)3]2H[PWl2O40]·4H2O,并采用元素分析、红外光谱、单晶X-射线衍射对其进行了表征.晶体学参数:三斜晶系,C2/C空间群,a=2.468 9(5)nm,b=1.083 1(5)nm,c=2.248 2(5)nm,α=90.00°,β=121.094(5)°,γ=90.00°,V=5.148(3)nm3,Z=4,R1=0.045 6,wR2=0.147 1.该化合物的基本结构单元是由2个质子化的三乙胺分子、4个水分子、1个质子和1个Keggin型杂多阴离子[PWl2O40]3-组成.不同结构单元之间通过氢键作用形成一维链状结构,链间进一步通过分子间氢键构成三维超分子结构.     

新型超分子化合物(H_3NCH_2CH_2NH_3)6[P_4Mo_(10)O_(46)]·10H_2O的水热合成及晶体结构

利用中温水热技术合成了新型超分子化合物(H3NCH2CH2NH3)6[P4Mo10O46].10H2O,采用元素分析、红外光谱、热重分析和X射线单晶结构分析对其进行了表征.结果表明:该化合物属于三斜晶系,P-1空间群;晶胞参数a=1.0892nm,b=1.5834nm,c=1.9974nm,α=88.523°,β=78.513°,γ=71.453°,V=3.1978nm3,Z=2,R1=0.0312,wR2=0.0795.     

十钒酸与二苯并十八冠六加合物的合成及晶体结构研究

合成了含有十钒酸阴离子的超分子化合物[ Na(DB18C6)(H20)2]3V10O28[CH3OH].[H3O]3并通过X射线衍射分析、IR光谱及元素分析对其结构进行了表征.单晶X射线衍射分析表明化合物属于单斜晶系,P21/m空间群,a=15.5520(16) nm,b=18.7581( 19)nm,c=16.3619(18) nm,β=109.0390(10),V=4512.1(8)nm3,Z=2,F(000)=2380,R1=0.0606,wR2=0.1312.化合物的晶体结构单元由一个无质子化的十钒酸根多阴离子、一个甲醇分子、3个[ Na( DB18C6)(H2O)2]+和3个H3O+阳离子组成,并且彼此之间通过静电力和氢键形成稳定的三维结构.     

锰支撑磷钼多金属氧酸盐的水热合成及晶体结构

利用中温水热技术合成了新型锰支撑磷钼多金属氧酸盐超分子化合物(H2en)8·[MnMo12O30(PO4)2(HPO4)6]·H2O,并采用元素分析、红外光谱、热重分析和x射线单晶衍射对其进行了表征.结果表明:该化合物属于三斜晶系,P-1空间群;晶胞参数a=1.2767 nm,b=1.362 5 nm,c=1.4124 nm,a=100.550°,β=109.005°,γ=115.398.,V=1.942 9 nm3,Z=1,R1=O.049 5,wR2=0.134 2.     

(NH3CH2CH2NH3)4[CuV6O8(HPO4)6(PO4)2(H2O)2]·4H2O的水热合成及晶体结构

利用中温水热技术合成了新型层状磷钒铜多金属氧酸盐(NH3CH2CH2NH3)4 [CuV6O8(HPO4)6(PO4)2(H2O)2]·4H2O,采用元素分析、红外光谱、热重分析和X射线单晶结构分析对其进行了表征.结果表明:该化合物属于单斜晶系,C2／c空间群;晶胞参数α=2.076 0 nm,b=1.003 0 nm,c=2.378 4 nm,α=90°,β=101.17°,γ=90°,V=4.858 6 nm3,Z=8,R1=0.071 9,ωR2=0.143 2.     

[Zn(IBG)(H_2O)_3]·2H_2O配合物的合成、结构和热稳定性研究

合成了化合物[Zn(IBG)(H2O)3].2H2O(H2IBG=1,3-苯二甲酰二甘氨酸),并通过X射线衍射对其单晶结构进行了测定.该结构属于正交晶系,空间群C222(1),分子量Mr=431.65,晶胞参数a=0.693 01(14)nm,b=0.772 56(14)nm,c=23.006 4(6)nm,V=1.609 61nm3,Z=4,Dc=1.781g.cm-3,F(000)=888.0.由于分子内和分子间氢键,使得分子结构更趋稳定.通过红外光谱(IR)、热重分析及XRD对化合物进行了表征.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has