高pH下钇—L—脯氨酸四核配合物[Y4（HPrO）4（PrO）μ2（3—OH）4（H2O）7]（ClO4）6.7H2O

在水溶液中，调节pH至6．3，合成了高氯酸钇与L－脯氨酸的配合物[Y4(HPrO)4(PrO)2(μ3-OH)4(H2O)7](ClO4)6.6H2O单晶，并测定了其晶体结构，该晶体属菱形晶系，R3空间群，晶胞参数：a=b=c=12.7863(15)A,α＝β＝γ＝100．217（17）度，V＝1977．0（4）A3，Z＝1，最终 偏差因子R1＝0．0869，wR2=0.2203。每个昌胞以四个Y3＋通过四个μ3-PH-离子，，六个脯氨酸羧基桥联成四核簇状结构。其中三个Y3＋每个均与三个u3-OH，三个羧基氧原子，两个水分子配位，其配位数为8，另一个Y2＋，与三个u3-OH，三个羧基氧原子，一个水分子配位，其配位数为7。     

配合物Co(H2O)4(μ2-H2O)2K2(H2O)4(Hpht)4的合成与晶体结构

在水溶液中用硫酸钴与邻苯二甲酸氢钾反应得到了分子式为Co(H2O)4(μ2-H2O)2K2(H2O)4(Hpht)4的配合物,通过X-射线单晶衍射研究了其结构.该配合物的晶体属单斜晶系,空间群P21/c,晶胞参数a=10.430 7(2),b=6.857(3),c=29.577 5(5),β=97.987 0(10)°,V=2094.90(5)3,Z=2,Dc=1.550g/cm3,Mr=977.77,F(000)=1010,μ(MoKα)=0.702 mm-1,R1=0.0723,wR2=0.1875(I>2σ(I)).晶体分析表明钴与6个水分子的氧原子配位,其中两个氧原子作为桥联原子和两个K原子配位;K原子是五配位的,其他的配位原子来自两个水分子和两个Hpht,分子通过氢键构成沿ab面的层状结构.     

[Nd(C10H9N2O4)(C10H8N2O4)(H2O)3]2·phen·4H2O 超分子化合物的合成、晶体结构及热稳定性

在水-乙醇混合体系中,以2-羰基丙酸水杨酰腙(C10H10N2O4)、1,10-菲啉(C12H8N2,简称phen)与N d(NO3)3.4H2O反应,首次培养出黄色单晶[N d(C10H9N2O4)(C10H8N2O4)(H2O)3]2.phen.4H2O.该晶体属三斜晶系,空间群为P-1,晶胞参数a=1.390 1(2)nm,b=1.407 3(2)nm,c=1.764 5(3)nm,α=74.298(2),°β=68.911(2),°γ=71.703(2),°V=3.009 1(8)nm3,Z=2,μ=1.800 mm-1,Dc=1.690 g/cm3,F(100)=1 544,R=0.028 4,wR=0.063 0,GOF=1.010.所测单晶的每个配合物分子中含有两个N d(Ⅲ)的9配位结构单元,每个N d(Ⅲ)分别与两个2-羰基丙酸水杨酰腙和三个水分子配位;每个2-羰基丙酸水杨酰腙中的羧基氧、酰胺基中的羰基氧和C=N中的氮与N d3 配位,形成两个共边的稳定五元环,另三个配位原子则分别来自三个水分子中的氧原子,该结构单元呈扭曲的单帽四方反棱柱,而在每两个N d的九配位单元周围还有一个游离的1,10-菲啉分子和四个水分子.整个配合物通过氢键连结成一个三维网状超分子化合物.IR及热分析佐证了配合物的组成.     

新型超分子配合物{[Cu(Hhbd)(Nphe)]·H2O}·3H2O的合成、晶体结构与表征

采用羟基丁二酸铜与5-硝基邻菲咯啉反应合成了新型三维超分子配合物{[Cu(Hhbd)(Nphe)]·H2O}·3H2O(其中Hhbd=羟基丁二酸根,Nphe=5-硝基邻菲咯啉),通过元素分析、红外光谱、热分析和X射线单晶衍射等技术对其进行了表征.配合物属单斜晶系,空间群C2/c;晶胞参数a=1.7651(3)nm,b=1.9229(3)nm,c=1.2427(19)nm,β=99.50(3)°,V=4160.4(11)A3;Z=8;最终偏离因子R1=0.0573,wR2=0.1169.配合物中每个铜(Ⅱ)原子与来自5-硝基邻菲咯啉的两个氮原子、羟基丁二酸根的三个氧原子以及一个水分子的氧原子配位,形成畸变的八面体结构;紧邻单元通过邻菲罗啉环间的π-π堆积作用形成一维超分子链;链间籍羧基氧原子与配位水分子、未配位的羟基氧原子与羧基氧原子形成O-H…O氢键的连接拓展为三维超分子结构.     

配位聚合物Ni(2,6-DPC)2Ni(H2O)5·2H2O的水热合成与表征

在水溶剂中通过2,6-吡啶二羧酸和NiCl2·6H2O反应生成三维配位聚合物Ni(2,6-DPC)2 Ni(H2O)5·2H2O(DPC=2,6吡啶二羧酸)1.对其进行元素分析、红外光谱分析、热重量分析和单晶X射线衍射测定.该配合物属P2(1)/c.晶胞参数a=8.3261(17)A,b=27.227(5)A,c=9.6556(19)A,β=98.67(3)°,V=2163.9(7)(A)3,Z=7,F(000)=1248,R=0.0618,wR2=0.1721.该配位聚合物中镍配位有两种情况:Ni(1)与6个氧原子配位,有5个是与水分子中的氧配位另外一个是与Ni (2)相连的pdc2-的羧基氧.Ni(2)与全部来自pdc2-的四个羧基氧和两个氮原子配位.未配位的羧基氧和另一单元的配位水之间存在氢键,因此,这个结构集团相连接形成无限的一维链.此外,通过氢键的相互作用结构扩展到二维结构.最终,聚合物在氢键和π-π键作用下拓展为三维网状结构.     

二维配位聚合物Co(PDC)·2H2O的水热合成与热性能研究(PDC=3,5-二羧酸吡啶)

在413K下,3,5-二羧酸吡啶和CoCl2·6H2O的混合物在水热条件下反应得到标题化合物Co(PDC)·2H2O (PDC=3,5-二羧酸吡啶).单晶X射线衍射表明该配位聚合物属于单斜晶系,空间群为C2/c,晶胞参数为a=0.9902(2) nm, b= 1.1981(2) nm, c=0.73997(15) nm, β=105.18(3)°,Z=4.具有2-D层状结构的Co(PDC)·2H2O中包含钴阳离子和3,5-二羧酸吡啶,其中每个钴阳离子被1个吡啶环上的氮原子、2个羧基上的氧原子以及2个水分子上的氧原子配位.热分析结果表明该化合物在330℃以下保持热稳定.     

{[Mn(μ-maleate)(phen)(H2O)2]·2H2O}n的合成及其性质

报道了一个新型一维的多核锰的配合物 {[Mn( μ- maleate) ( phen) ( H2 O) 2 ]· 2 H2 O}n( I)( phen为邻菲罗啉 ,μ- maleate为马来酸根桥 )的合成、元素分析、晶体结构、红外光谱和热重分析 .( I)是通过马来酸锰与邻菲罗啉在乙醇的水溶液中制得的 .其晶体属于三斜晶系 ,空间群为 P- 1 ,a=0 .81 1 9( 1 )、b=0 .81 57( 1 )、c=1 .3632 ( 1 ) nm、α=99.0 8( 1 )、β=87.1 1 ( 1 )、γ=1 0 1 .94°、V=0 .872 1 ( 3) nm3 、Z=2、Dc=1 .60 4 g/cm3 、μ=7.73cm-1、F( 0 0 0 ) =434.结构解析采用直接法 ,R和 Rw 分别收敛到 0 .0 37和 0 .0 50 .单晶结构分析表明 ,( I)中 Mn原子是六配位的 ,配位原子分别为邻菲罗啉的两个 N原子、两个 H2 O中的 O原子和两个马来酸根的 O原子 .马来酸根配体通过两端的羧基氧与 Mn原子桥联进而形成一条无穷链 .配合物分子中存在两种氢键 :即一个未配位的羧酸氧原子与一个已配位的 H2 O分子间形成的分子内氢键 ;结晶水分子与配合物链上的 O原子及配位水分子间的分子间氢键 .红外光谱对羧基在 1 42 5、1 540 cm-1处的对称和不对称伸缩振动以及配位水分子和晶格水分子在 350 0～ 31 0 0 cm-1处的振动吸收进行了归属 .热重分析表明 ,晶体约在 60°C开始失去结晶水 ,紧接着开始失     

新型超分子配合物[Cd(C6H5N5)2(H2O)2Cl2]·2H2O的合成与晶体结构

利用四唑吡啶(4-PTZ)与CdC l2.5H2O反应得到了一种新型超分子配合物[Cd(C6H5N5)2(H2O)2C l2].2H2O,通过元素分析、X-射线单晶衍射等技术测定了晶体结构,结果表明,配合物属三斜晶系,空间群P-1,a=0.3725(2)nm,b=0.7894(3)nm,c=0.8857(3)nm,β=90.173(3);°Z=1;R=0.0767。配合物的基本构建单元包含1个Cd(Ⅱ)原子、2个四唑吡啶、2个配位氯原子、2个配位水分子和2个游离水分子;Cd(Ⅱ)的配位数为6,处于畸变的八面体配位环境。紧邻单元通过氢键作用在bc面形成二维超分子层;层间通过氢键和π-π堆积作用扩展为三维超分子体系。     

一维螺旋状配合物[Cu(C9H7O5)2(Py)2(H2O)]n的合成与晶体结构

合成了一种新型的配合物[Cu(C9H7O5)2(Py)2(H2O)]n(C9H7O5为4-羧基苯氧乙酸根阴离子,Py为吡啶),并对其进行了元素分析,IR和单晶X-射线的表征.该配合物属于单斜晶系,空间群为C 2/c,晶胞参数a=1.503(7)(nm),b=0.581(3)(nm),c=3.174(16)(nm);β=101.60(12)(°),V=2.720(2)(nm3),Mr=629.04,Z=4,R indices[I＞2sigma(I)]R1=0.0867,wR2=0.1987;R indices(all data)R1=0.1422,wR2=0.2291.Cu原子为五配位的四方锥构型,每个Cu都分别与两个4-羧基苯氧乙酸根配体中的一个羧基氧及两个吡啶氮配位形成四方形底,再与H2O以Cu-O键配位,则O原子在四方锥的顶点上,以此配位单元为构筑块由分子间氢键连接成一维螺旋链.     

新型单桥配合物[Co_2(ABTC)(Phen)_2(H_2O)_6]·2H_2O的合成及晶体结构

以3,3',4,4'-偶氮苯四羧酸(ABTC)和1,10-菲罗啉(Phen)为配体,采用常规溶剂挥发法合成了新颖单桥配合物[Co2(ABTC)(Phen)2(H2O)6]·2H2O(1),经过X-射线单晶衍射和元素分析对其晶体结构进行表征.1属单斜晶系,空间群C12/c1(15),其晶胞参数:a=2.189 3(7)nm,b=0.801 3(3)nm,c=2.603 8(8)nm;α=90.00(°),β=108.369(5)(°),γ=90.00(°);V=4.335 06(762)nm3,Z=22,Dc=1.036 21g/cm3,F(000)=140 1,GOF=1.052,R1=0.097 6,WR2=0.128 8.1中的Co(Ⅱ)与ABTC中的一个羧基氧原子、三个水氧原子、啡啰啉的两个氮原子配位形成了六配位的八面体几何构型桥连配合物.通过两个游离的水分子和配位水分子之间的氢键作用,堆积成了三维超分子结构.     

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