二水合4,4''''-偶氮二苯甲酸的晶体结构

报道了二水合4,4'-偶氮二苯甲酸的晶体结构,C14H14N2O6,Mr=306.27,晶体属正交晶系,空间群为Pna21,晶胞参数a=1.181 97(15)nm,b=0.394 32(5)nm,c=3.096 7(4)nm,V=1.443 3(3)nm3,Z=4,Dc=1.409 Mg/m3,F(000)=640,μ=0.112 mm-1,λ(MoKα)=0.071 073 nm,R1=0.064 7 andwR2=0.149 2,2 758独立衍射点(I＞2σ(Ⅰ)).晶体堆积通过苯环的π-π堆积和羧基与水的分子间氢键作用而稳定,形成超分子结构.     

三维超分子化合物[Mn（dpp）2（H2O）4]（ada）（H2O）的合成、晶体结构和热重分析

在水热条件下合成了结构新颖的三维超分子化合物[Mn(dpp)2(H2O)4](ada)(H2O)(dpp=1,3-Di(4-pyridyl)propane,Na2ada=anthraquinone-2,6-disulfonic acid disodium salt),通过元素分析、红外光谱、X射线单晶衍射仪、热重等方法对超分子化合物的结构和性质进行了表征和测定。测定结果显示配合物晶体属三斜晶系,P-1空间群,晶包参数a=0.9790(6)nm,b=0.9892(6)nm,c=1.2728(8)nm,α=90.150(11)°,β=112.106(10)°,γ=98.997(11)°。结构分析表明配合物晶体结构中存在丰富的氢键、边和面之间C—H…π键和芳香分子面面之间的π…π堆积作用,通过这些弱相互作用使其具有三维无限网络结构,氢键、C—H…π键和π…π堆积在超分子结构构筑中起了非常重要的作用。     

3-羧基水杨醛缩2-氨甲基吡啶合铜配合物的合成、表征和晶体结构

合成了3-羧基水杨醛缩2-氨甲基吡啶(H2SP)及其Cu(Ⅱ)配合物[Cu(HSP)(H2O)2]ClO4,通过红外光谱、紫外光谱、X射线单晶衍射分析等手段对配合物的结构进行了表征.该配合物属于单斜晶系,P-1空间群,晶胞参数为:a=0.871 53(12)nm,b=1.017 05(15)nm,c=1.939 3(3)nm,β=93.3°,V=1.716 13 nm3,Z=4,Dc=1.758 12 g/cm3,Mr=454.27,F(000)=924.00,R1=0.072 5,wR2=0.092 2.配合物中铜离子为五配位,处于变形的四方锥形配位环境中.分子间通过π-π堆积和氢键作用形成双分子链,然后通过π-π堆积形成二维层状结构,最后通过C-H…O弱氢键形成三维结构.     

2,2-二对硝基苯氧基-1,3-苯并二氧噁茂的合成及其晶体结构

合成了2,2-二氯-1,3-苯并二氧噁茂(DCBZ),并用得到的DCBZ与对硝基酚反应得到2,2-二(对硝基苯氧基)-1,3-苯并二氧噁茂(DPBZ).对DPBZ用IR、1HNMR进行表征并培养出单晶,经X射线衍射法确定了其晶体结构,R=0.0414,Rw=0.1044.晶体结构表明,晶体属于单斜晶系,P2(1)/c空间群,晶胞参数:a=15.7093(4)nm,b=8.7799(2)nm,c=13.5336(3)nm,β=102.840(2)°,V=1819.96(7)nm3,Z=4.化合物通过分子间的弱氢键作用和π-π堆积形成超分子结构,分子中2个对硝基苯氧基分别处于胡椒环平面的两边.图6,表4,参16.     

金属有机分子集合体[(fcpa)2bpy]的合成、晶体结构和量子化学研究

3-二茂铁羰基丙酸(fcpa)和4,4'-联吡啶(bpy)依靠氢键作用力,构筑了1个新的金属有机分子集合体[(fcpa)2bpy].单晶结构解析表明该晶体属于单斜晶系,空间群为P2(1)/n.晶胞参数为:a=0.572 4 nm,b=3.522 6 nm;c=0.835 9 nm;α=γ=90°,β=102.07(3)°,R1=0.053 1,wR2=0.120 0.在π-π堆积作用下,该分子沿着n*轴方向堆积成为1个超分子化合物.此外,通过量子化学计算研究了此化合物的前线轨道以及各原子Mullik-en电荷,这对于研究化合物的反应性和稳定性有一定帮助.     

超分子化合物{[Mn2(pda)(phen)4(H2O)2]2H2O·2ClO4-}的构筑及表征

利用间苯二乙酸、1,10-邻菲·%啉和高氯酸锰在水热条件下反应制备了一种新型超分子配合物{[Mn2(pda)(phen)4(H2O)2]·2H2O·2ClO4-}(H2pda=间苯二乙酸,phen=1,10-邻菲·%啉).通过X单晶衍射测定了晶体结构,并用元素分析、红外光谱等技术对其进行了表征.配合物属3斜晶系,空间群为P-1,a=1.129 0(2) nm,b=1.705 0(2) nm,c=1.734 5(1) nm;α=110.559(1)°,β=107.588(9)°,γ=93.102(12)°;Z=1,R1=0.071 0,wR2=0.202 9.晶体结构分析表明2个锰在1个间苯二己酸的连接下形成了一个双核结构,再在船型六元环氢键和π…π堆积共同作用下,双核结构单元被连成2维网络结构.毗邻的2维结构之间又通过氢键的支撑,拓展为3维网状超分子体系.     

2,2-二对硝基苯氧基-1,3-苯并二氧(口恶)茂的合成及其晶体结构

合成了2,2-二氯-1,3-苯并二氧口恶茂(DCBZ),并用得到的DCBZ与对硝基酚反应得到2,2-二(对硝基苯氧基)-1,3-苯并二氧(口恶)茂(DPBZ).对DPBZ用IR、1HNMR进行表征并培养出单晶.经x射线衍射法确定了其晶体结构,R=0.041 4,Rw=0.1044.晶体结构表明,晶体属于单斜晶系,P2(1)/c空间群,晶胞参数:a=15.709 3(4)nm,b=8.7799(2)nm,c=13.533 6(3)nm,β=102.840(2)o,V=1819.96(7)nm.3,Z=4.化合物通过分子间的弱氢键作用和π-π堆积形成超分子结构,分子中2个对硝基苯氧基分别处于胡椒环平面的两边.图6,表4,参16.     

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。     

新型超分子配合物[Cu(Hhbd)(phen)2]·1.5H2O·2CH3OH的合成、晶体结构与表征

利用螯合配体1,10-邻菲咯啉(phen)与羟基丁二酸(H3hbd)及铜盐反应合成了一种新型超分子配合物[Cu(Hhbd)(phen)2].1.5H2O.2CH3OH,通过单晶衍射测定了晶体结构,并用元素分析、红外光谱、热分析等技术对其进行了表征。配合物属三斜晶系,空间群P-1;晶胞参数:a=1.20624(17)nm,b=1.6598(2)nm,c=1.6863(3)nm,α=117.23(9),°β=71.262(3),°γ=117.23(9);°Z=4;最终偏离因子R=0.0420。配合物中每个Cu(Ⅱ)原子与来自两个phen的4个N原子和羟基丁二酸根(Hhbd)的1个O原子配位,形成畸变的三角双锥结构单元。紧邻的单核单元通过phen分子间的π-π堆积作用及Hhbd的羧基O和羟基O与phen环上C原子间的C-H…O氢键的协同作用形成一维zigzag超分子链,毗邻的超分子链籍两种不同氢键相互作用的连接构筑了二维超分子体系。     

环状双核钴配合物的合成、晶体结构及其性质

在水热反应条件下合成了一个新型Co(Ⅱ)配合物[Co2(cpa)2(phen)2(H2O)2](1)(cpa =3-(4-羧基苯基)丙酸、phen=1,10-邻菲罗啉).采用CHN元素分析、红外光谱、差热-热重及单晶X-射线衍射等方法对配合物的晶体结构进行了表征.配合物属于单斜晶系,空间群为P2(1)/c;晶体学参数:a=1.26192(14) nm, b=1.59916(17) nm, c=1.04130(11) nm,β=111.935(2)°.配合物1为环状双核结构,其基本结构单元由1个Co原子、1个3-(4-羧基苯基)丙酸、1个1,10-邻菲罗啉和1个配位水分子组成,形成畸变的八面体配位构型.相邻的配合物分子间通过氢键的识别作用形成1维超分子链.π···π堆积作用将邻近的超分子链进一步扩展为2维超分子网.     

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     

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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