链状铜配合物[Cu(bipy)_2Cl]_2Cl_2·nH_2O(bipy=2,2′-联吡啶)水热合成

利用水热合成方法制备了一种新颖的由π-π堆积形成的链状二价铜配合物[Cu(bipy)2Cl]2Cl2·nH2O(bipy=2,2'-联吡啶),并用单晶衍射仪测定了其晶体结构,在2K～300K之间测定其磁化率.结果表明:该化合物为单斜晶系,P2/c空间群,a=1.2328(3)nm,b=1.4781(3)nm,c=1.4311(3)nm,α=90°,β=108.51(3)°,γ=90°,V=2.4730(9)nm3;8K～298K之间标题化合物呈现明显的铁磁性耦合相互作用,在2K～8K范围内却呈现出反铁磁性相互作用的特征.元素分析及红外光谱进一步佐证了化合物的结构.     

双(3-甲氧基-4-羟基)苯甲醛合氢氧化锌配合物的晶体结构

合成双 ( 3-甲氧基 - 4-羟基 )苯甲醛合氢氧化锌配合物 ,测定红外光谱、热重、单晶结构 ,晶体C16H18O8Zn属单斜晶系 ,空间群为Cc ,晶胞参数 :a =2 .2 1 6 7( 4 )nm ,b =1 .0 540 ( 2 )nm ,c =0 .780 0 ( 2 )nm ,β =1 0 6 .9°,Z =4。结构解析最终一致性因子R1=0 .0 390 ,wR2 =0 .0 91 6。中心Zn原子通过 6个O原子形成八面体结构的配合物。分子间通过氢键和范德华力形成 3D网状超分子结构     

2-氨基-3-氰基-4-(2’,4’-二氯苯基)-4H-萘并[1,2-b]吡喃的合成和晶体结构

标题化合物C22H17Cl2NO3的晶体由α-乙氧羰基-2,4-二氯肉桂腈、β-萘酚在TEBA存在下合成并经DMF与水的混合溶剂重结晶而得.其结构通过元素分析、IR和1HNMR进行了表征,用X射线单晶衍射法测定了该化合物的晶体结构.结果表明,晶体属于单斜晶系,P21/n空间群。a=1.450 5(2)nm,b=0.903 7(1)nm,c=1.491 3(2)nm,α=90°,β=101.21(1)°,γ=90°,Mr=414.27,V=1.917 5(4)nm3,Dc=1.435 g·cm-3,Z=4,μ(MoKα)=0.362 mm-1,F(000)=856.晶体结构用直接法解出,经全矩阵最小二乘法修正,最终偏离因子R=0.044 44,Rw=0.117 7.化合物分子中,原子C(1),C(2),C(3),C(4),C(5)和O(1)形成一个六元环,该六元环中C(1)-C(2)键长为0.134 6(3)nm,表明为双键.此六元环为船式构象.     

4-啶-3-甲酸构筑的三维Cu(Ⅱ)配合物及理论计算

采用水热法合成了一种新型配合物 ［Cu2(4,3-pybz)4(H2O)］n (1) (4,3-pybz = 4-吡啶-3-苯甲酸), 通过X-射线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1属单斜晶系, 空间群C2/c;晶胞参数为:a=1.2004(3) nm,b=1.52305(4)nm, c=2.23362(6) nm, β=95.94°, Z=4,V=4.06173(18) nm3,Mr=937.90,Dc= 1.694 Mg·m-3,F(000)= 2     

氰基胍分子结构的研究

通过硫脲与氯乙酸反应制备了氰基胍,由红外光谱分析得出产物有氰基胍的特征峰并用四圆衍射仪测得了其结构。结果表明,该晶体属单斜晶系,空间群为C2/c,晶体学参数为:a=1.4978(2)nm,b=0.4497(1)nm,c=1.3109(2)nm;α=90°,β=115.37(1)°,γ=90°;V=0.7978(2)nm~3,Z=8,D_C=1.400g·cm~(-3),μ=1.04cm~(-1),F(000)=352;最终偏离因子R=0.0387,ωR=0.1075.     

Cu(Ⅱ)离子驱动hdpe配体分解构筑的新型超分子配合物(hdpe=2-羟基-2,2''''-二吡啶基-乙酮)

在Cu(Ⅱ)离子驱动下,2-羟基-2,2′-二吡啶基-乙酮于甲醇溶液中发生分解形成超分子配合物Cu[(C5H4N)COO]2.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.配合物属单斜晶系,空间群P2(1)/c,a=0.37746(7)nm,b=1.2048(2)nm,c＝1.1923(2)nm;α=90°,β=91.598(3)°,γ=90°;Z＝2,R＝0.0252.配合物中,两个2-羧基吡啶均以二齿螯合方式与Cu(Ⅱ)原子配位,形成具有平面四边形的单核基本单元,相邻单元籍C-H…O氢键的连接构筑了二维层状超分子结构,毗邻的二维结构又通过π-π堆积相互作用拓展为三维超分子体系.     

2-氨基-6-二茂铁基-4-(2,4-二氯苯基)吡啶-3-腈类化合物的微波合成和结构表征

标题化合物C24H20Cl2FeN2O2是由2,4-二氯苯甲醛、乙酰二茂铁、氰乙酸乙酯、醋酸铵在水相中微波辐射下反应制得。结构通过单晶X射线衍射法测定,其晶体属单斜晶系、空间群P21/n,a=0.749(3)nm,b=1.136(3)nm,c=2.577(3)nm,α=γ=90°,β=94.021(2)°,V=2.188(1)nm3,相对分子质量Mr=495.17,晶胞密度Dc=1.503g/cm3,Z=4,λ=0.071 073nm,吸收系数μ(Mo Kα)=0.958mm-1,F(000)=1 016,最终偏离因子R=0.079 7,wR=0.161 6。     

2-环己酮-1,3-二肟的合成和晶体结构

合成了2 环己酮 1,3 二肟,并测定了该分子的晶体结构.晶体属单斜晶系,空间群为P21/c,晶胞参数:a=1.0255(2),b=0.5687(1),c=1.2953(3)nm,β=107.01(3)°,V=0.7223(2)nm3,Z=4,Dc=1.436g/cm3,F(000)=328.对于1286(I 2σ(I))个可观察点,最终偏差因子R=0.0623,wR=0.1769.整个分子呈蝴蝶型,两翼的二面角为25.7(3)°.由于分子间氢键的相互作用,晶体呈二维网状结构.     

一个新型的通过氢键和π…π相互作用形成的三维 Ni(Ⅱ)聚合物[Ni(μ-isophthalate)(CH_3OH) _4]_n(英文)

合成了一个新型的镍 ( )配合物 [Ni(m-path) (CH3OH) 4]n(m-path)为间苯二酸 ) ,并通过 X-射线衍射测得其晶体结构 .晶体属单斜晶系 ,空间群为 C2 /c,晶胞参数 a=1 .693 1 (8) nm,b=1 .2 965 (6) nm,c=0 .73 40(3 ) nm,α=90°,β=1 0 9.3 83 (7)°,γ=76.763 (5 )°,V=1 .5 1 99(1 1 ) nm3,Z=4.相邻的一维之字链通过氢键和 π…π相互作用形成三维的网状结构     

质子化N，N＇-双（吡啶基-2-亚甲基）-1，4-二氮环庚烷高氯酸盐的合成、表征和晶体结构研究

合成并表征了一个吡啶功能化1,4-二氮环庚烷(DACH)化合物[N,N'-双(吡啶基-2-亚甲基)-1,4-二氮环庚烷]的质子化高氯酸盐. 用X-射线衍射技术测定了标题化合物H4BPDACH·(ClO4)4·1.5H2O (1)的晶体结构三斜晶系,P-1空间群,晶胞参数a=0.791 1(5) nm, b=1.269 5(9) nm, c=1.517 8(11) nm, α=104.448(13)°, β=102.383(13) °, γ= 92.159(12) °, V=1.435 2(17) nm3, Z=2. 化合物1的不对称单元中包含两个晶体学独立的[H4BPDACH]4+阳离子,其中DACH环均采取类似的船式构象,但两个侧臂吡啶环分别采取顺势和反式排列. 质子化NH基团和溶剂及阴离子之间存在多重氢键相互作用,这进一步稳定了此结构.     

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.     

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     

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

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