一种新的含有低价态钼磷酸盐{P4Mov6}建筑单元超分子化合物的溶剂热合成和晶体结构

通过水热合成法合成了一个新的夹心型钼磷酸基“三明治”状有机一无机杂化化合物[C3N2H5]2[C7NH10]2{MnFMo8O12（OH）°（PO4）（H2PO4）3]2}[C5NH5]4·2H2O（化合物1）,并对其进行元素分析、红外光谱、热重分析和X射线单晶衍射表征。单晶结构解析表明,该化合物属于正交晶系,Pbca空间群,晶胞参数a=1．69774（17）nm,b=2．0438（2）nm,c-2．5047（3）nm,a-90°,B=90°,y=90°,V=8．6908（15）nm3,Z=4。化合物1中的夹心结构阴离子是由2个{MnEM06O12（0H）3（PO4）（H2PO4）3]2}建筑单元通过1个八面体配位的金属Mn2＋离子键连形成。化合物[C3N2H5]2[C1NH10]2{MnEMo6O12（OH）3（PO4）（H2PO4）3]2}[GNH5]4·2H2O中,具有夹心结构的Mn（P4Mo6）2与质子化的咪唑、N-乙基吡啶、吡啶及水分子通过氢键连接形成超分子化合物。室温固态荧光光谱分析表明,该化合物在437nm处具有较强的荧光发射。化合物1的合成表明溶剂在多金属氧酸盐的合成中起到了重要的作用。     

一维链状杂多化合物的水热合成及结构表征

利用水热合成方法制备了新颖的基于{Na[Mo6O12)(OH4)3(HPO4)(H2PO4))3]2}3-构筑单元的一维链状杂多化合物[DETA]4NaH2{Na[Mo6O12(OH)3(HPO4)(H2PO4)3]2}·8H2O(DETA=diethylenetriamine), 并用元素分析、IR、UV、TG及X-射线单晶衍射对其进行了表征. 该化合物属于三斜晶系, P-ī空间群, a=12.421 2(4)nm, b=12.5911(4) nm, c=13.078 2(4) nm, α=85.411 0(10)°, β=73.313 0(10)°, γ=82.276 0(10)°, V=1 939.63(11) nm3, Z=2, R1= 0.024 4. 杂多阴离子{Na[Mo6O12(OH12(OH)3(HPO4)(H2PO4)3]2}3-具有夹心结构, Na离子位于2个半单元[Mo6O12(OH)3(HPO4)(H2PO4)3]2-中心. 夹心型阴离子之间又以Na离子为桥形成了一维链, 并通过氢键作用形成了三维网状结构. 半单元[Mo6O12(OH)3(HPO4)(H2PO4)3]2-中, 6个MoO6八面体通过共边连接形成一个Mo6环,4个PO4四面体位于环的一侧.     

二苯基氧化磷及亚磷锂配位聚合物的合成与结构研究

用HN(CH3)2和LiBun反应制备LiN(CH3)2,然后与对苯二腈加成及随后与一氯二苯基膦反应生成化合物C6H4{1,4-C[N(CH3)2](=NPPh2)}2,再用氧化剂H2O2与此化合物进行反应,得到了离子型超分子化合物C6H4[C(NH2)(NCH3)2]2 2·2[Ph2PO2]-(1)和配位聚合物Li2(Ph2PO2)2[Ph2P(O)H](2),对2的晶体结构进行了测定.锂离子的配位多面体是四面体型,锂离子和氧原子交替连接形成了一维链状配位聚合物.讨论了化合物2产生的原因.     

酸度对Strandberg结构磷钼酸盐形成的影响

在反应物、反应温度等条件相同的情况下,通过调控溶液的pH值,利用水热合成法得到了（C2H10N2）2[Mo5O15（HPO4）2]（1）、（C2H10N2）3[Mo5O15（PO4）2]·6H2O（2）和（C2H10N2）[Na（H2O）5HPO4]2（3）3个化合物,并通过IR光谱、元素分析、热重分析和单晶X-射线衍射分析进行了表征.结果表明,溶液的pH值不同,生成产物不同.在弱酸性条件下生成Strandberg结构.当溶液为碱性时只得到简单化合物.化合物1和2中存在P2Mo5单元与质子化的乙二胺分子的静电作用.分子间通过N-H…O氢键相连形成无限的三维网状结构.化合物3中P2Mo5单元消失,PO4^3-与质子化的乙二胺构成简单的离子型化合物.PO4^3-单元之间通过O—Na—O桥键和分子间氢键作用形成无限三维孔道结构.     

基于{Cr（OH）6Mo6O18）^3-多酸阴离子为配体的过渡金属离子配合物的合成及结构表征

以β-Anderson型{Cr（OH）6Mo6O18}^3-多酸阴离子为配体,质子化的4,4’-bpy为模板,利用电荷平衡阳离子,在水热条件下,合成了三种过渡金属Mn（Ⅱ）、Co（^3-）和Ni（^3-）的配合物：[4,4’-bpyH2]2[-Mn{Cr（OH）6Mo6O18}2]1、[4,4＇-bpyH][-Co（H2O）2{Cr（OH）6Mo6O18）]·4H2O2和[4,4’-bpyH][-Ni（H2O）2{Cr（OH）6Mo6O18}]·4H2O3．通过元素分析、单晶X射线分析、红外表征、热重分析和X射线粉末衍射等技术确定了化合物的组成和结构．在配合物1中,{Cr（OH）eMo6O18}^3-多酸阴离子作为六齿配体,Mn（Ⅱ）采用八面体配位方式,形成一维带状结构．配合物2和3互为异质同构体,{Cr（OH）6Mo6O18}^3-多酸阴离子作为四齿配体,Co（Ⅱ）或Ni（Ⅱ）采用八面体配位方式,形成二维层状结构,[4,4’-bpyH]＋填充在层间．     

有机-无机复合物[NH2(CH2)2NH2]6H8[Na2Mo12O30(H2PO4)6(HPO4)2]·4H2O的水热合成及结构

利用水热合成方法制备了组成为[NH2(CH2)2NH2]6H8[Na2Mo12O30(H2PO4)6(HPO4)2]·4H2O的有机-无机复合物, 并用元素分析、IR光谱、X-射线单晶衍射对其进行了表征. 该化合物属于三斜晶系, Pī空间群, a =1.204 05(7) nm, b =1.461 47(8) nm, c=2.132 56(12)nm, α =80.650 0(10)°, β =82.808 0(10)°, γ =76.236 0(10)°, V =3.581 8(3) nm3, Z =2, R1= 0.046 5. 化合物阴离子[Na2Mo12O30(H2PO4)6(HPO4)2]8-由两个结构单元[NaMo6O15(H2PO4)3(HPO4)]4- 通过O-Na(3)-O桥连而成. 结构单元[NaMo6O15(H2PO4)3(HPO4)]4- 中6个MoO6八面体位于同一平面并通过共边连接形成一个Mo6环, NaO6八面体和4个PO4四面体分别位于环的两侧.     

一个基于Cd-(P_4Mo_6)的超分子化合物的合成、结构及性质

以1,4-二咪唑基-丁烷(bbi)为有机胺模板剂,利用中温水热合成方法获得了一个三维镉超分子化合物:[Cd(H2O)]2[Cd(H2PO4)2(HPO4)4(PO4)2(Mo O2)12(OH)6]·(bbi)·(H2bbi)2·4H2O,并通过单晶X-射线衍射确定了其结构.该化合物分子式为C30H72Cd3Mo12P8N12O68,三斜晶系,P 1空间群,a=13.274(5),b=13.927(5),c=23.360(5),α=89.943(5)°,β=82.633(5)°,γ=77.037(5)°,Z=1,V=4172(2)3,Mr=3425.24,Dc=2.656 g/cm3,μ=2.760 mm-1,F(000)=3135,S=1.026,R=0.0499,wR=0.1150.晶体结构分析表明,配合物中存在两种配位环境的Cd2+.其中一种Cd2+与来自两个[P4Mo6O28(OH)3]9-[P4Mo6]中的六个Mo O6八面体的桥O配位形成Cd-(P4Mo6)2二聚物结构单元,另一种Cd2+通过来自不同P4Mo6中的PO4中的两个桥O连接成[Cd O(H2O)]2二聚物结构单元.上述两种结构单元交替连接成为一维无机配位聚合物链.相邻的无机链通过bbi配体以及结晶水分子拓展成三维超分子网络.另外,还研究了该化合物的光催化降解亚甲蓝活性和荧光性质.CCDC:1458162     

4,4'-联吡啶类超分子化合物的合成、晶体结构及表征

采用水热合成法,利用4,4'-联吡啶为桥联配体得到两种新型超分子化合物[(DPA)·0.5(4,4'-bipy)](1)和[Cd(H2O)2·(4,4'-bipy)2]2DSTA(2)(DPA=2,2'-联苯二甲酸、DSTA=2,2'-二硫代水杨酸),并通过X-射线单晶衍射分析、X-射线粉末衍射分析、元素分析和红外光谱对产物进行了表征。研究表明,化合物1通过O-H…N和C-H…O氢键构筑成2D的网络结构,化合物2中心镉离子为六配位构成1个八面体的配位结构,同时,化合物2中包含一个16.112×17.535(4,4)的2D拓扑结构。     

H4[Co(2,2'-bipy)3][As2W18O62]·18.5H2O的水热合成及晶体结构

以Na2HAsO4·7H2O,Na2WO4·2H2O,CoCl2·2H2O和2,2'-bipyridine为原料,利用水热合成法得到了分子式为H4[Co(2,2'-bipy)3] [As2W18O62] ·18.5H2O的有机-无机复合物,并对其进行了元素分析、IR及X-射线单晶衍射表征. 结构测定表明,该化合物属于六方晶系,P-6 2c空间群,晶胞参数: a=1.290 89(8) nm, b=1.290 89(8) nm, c=2.826 6(2) nm, α=90°, β=90°, γ=120°. V=4.079 2(5) nm3, Z=2, R1=0.026 5, wR2=0.065 1. 标题化合物分子是由1个手性的[Co(2,2'-bipy)3]2 配阳离子, 1个孤立的[As2W18O62]6-阴离子及18.5个游离的H2O分子组成. IR光谱和X-射线单晶衍射结果表明,在固态下,杂多阴离子[As2W18O62]6-与 [Co(2,2'-bipy)3]2 配阳离子之间存在着相互作用.     

无机-有机杂化钼磷、钒钼磷多酸化合物的合成与结构

通过对V2 O5 ,Na2 MoO4·2H2 O ,HF ,Ni(NO3) 2 ·6H2 O ,H3PO4和吡啶体系水热反应的研究 ,合成并表征了无机 -有机杂多酸化合物 [C5 H6 N] 3[C5 H5 N][PMo12 O40 ] ( 1 ) ,[C5 H6 N] 4[PVMo11O40 ] ( 2 )和 [C5 H6 N] 4[HPV2 Mo10 O40 ] ( 3 ) .化合物( 1 )属单斜晶系 ,C/ 2c空间群 ,a =2 .1 867( 6)nm ,b =1 .3 978( 4)nm ,c =1 .663 3( 3 )nm ,β =1 0 5.73 ( 1 0 )°,V =4 .893nm3,R =0 .0 60 4 ,Z =4 ;化合物 ( 2 )属单斜晶系 ,C/ 2c空间群 ,a =2 .1 858( 4)nm ,b =1 .3 971 ( 3 )nm ,c =1 .663 5( 3 )nm ,β =1 0 5.83 ( 3 )°,V =4 .8873 ( 1 7)nm3,Z =4 ,R =0 .0 4 63 ;化合物 ( 3 )属单斜晶系 ,P2 1n空间群 ,a =1 .1 1 2 2 ( 2 )nm ,b =1 .94 1 2 ( 3 )nm ,c=1 .2 4 84 ( 3 )nm ,β =99.89( 3 )°,V =2 .6565( 9)nm3,Z =2 ,R =0 .0 690 .     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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