水杨酸锰的流变相合成和红外光谱

用流变相反应法合成了水杨酸锰配合物,通过元素分析、TG确定该配合物的组成为Mn(HSal)2.2.5H2O(HSal=O-OHC6H4CO2),并对400－400cm^-1的主要红外光谱吸收峰进行了归属。     

配合物RE(HSal)3·H2O(RE=Eu,Gd,Tb)的热化学性质

目的研究配合物RE(HSal)3.H2O(HSal=C7H5O3;RE=Eu,Gd,Tb)的热化学性质。方法采用燃烧量热法。结果合成了3种稀土水杨酸配合物RE(HSal)3.H2O(RE=Eu,Gd,Tb)。在298.15 K下,用精密转动弹热量计测定出配合物的恒容燃烧能ΔcU,分别计算出它们的标准摩尔燃烧焓ΔcH m和标准摩尔生成焓ΔfH m。结论确定了配合物的组成,得到的热力学数据为扩大应用范围提供了理论基础。     

溴化重稀土甘氨酸配合物的热分解动力学

用差示扫描量热法(DSC)研究了三种溴化重稀土甘氨酸配合物(GdBr3·3Gly·3H2O、TbBr3·3Gly·3H2O、DyBr3·3Gly·3H2O)的非等温热分解过程,用Ozawa法、Kissinger法、Achar微分法及Coats-Redfern积分法计算了配合物的热分解动力学参数(E和A),并推断出了配合物失第1分子水、失第2分子水、脱甘氨酸步热分解反应的机理函数,其热分解动力学方程分别为:da/dt=A/β·e-E/RT(1-α),dα/dt=A/β·e-E/RT(1-α)2,dα/dt=A/β·e-E/RT(1-α)2     

[Mn(bipy)3]·(ClO4)2·1.875H2O的合成晶体结构及表征

合成了配合物[Mn(bipy)3]·(ClO4)2·1.875H2O(bipy=2,2'-联吡啶),并利用X-射线单晶衍射仪确定了其结构.该配合物属六方晶系,空间群为P63mc.在配合物中,每个Mn(Ⅱ)离子与3个2,2'-联吡啶的6个氮原子配位,形成了畸变的八面体结构.ClO4上的O原子与吡啶环上的H原子通过氢键连接成三维网状结构.     

高氯酸铕与L-谷氨酸配合物单晶体的标准生成焓及热化学研究

合成了稀土高氯酸铕-谷氨酸配合物晶体.经热重、差热、化学分析及对比有关文献,知其组成是[Eu2(Glu)2(H2O)8](ClO4)4·H2O,单晶结构,纯度是95.06%.选用Eu(NO3)3·6H2O、L-Glu、NaClO4·H2O、NaNO3和H2O作辅助物,使用具有恒温环境的反应热量计,以2mol·L-1HCl作溶剂,分别测定了[2Eu(NO3)3·6H2O+2Glu+6NaClO4·H2O]和{[Eu2(Glu)2(H2O)8](ClO4)4·H2O+6NaNO3+9H2O}在25℃时的溶解焓.设计-热化学循环求得化学反应的反应焓△rH =36.873kJ·mol-1,计算得配合物[Eu2(Glu)2(H2O)8](ClO4)4·H2O(s)在298.15K时的标准生成焓△1 H ,298.15K=-6584.853kJ·mol-1.     

[Mn（H2O）6]H2EDTA的合成和晶体结构

合成了一个新配合物[Mn(H2O)6]H2EDTA(MnC10H26N2O14,H4EDTA=乙二胺四乙酸),用单晶X射线衍射法测定了它的晶体结构.晶体属于单斜晶系,空间群P21/c,a=0.78248(2)nm,b=1.3537(3)nm,c=0.84009(2)nm,β=92 18(3)°,V=0.8892(3)nm3,μ=0 820mm-1,Z=2,Mr=453 27,Dc=1 693g/cm3,F(000)=474,R=0 0304,Rw=0 0732.该分子结构为单核单元,Mn原子位于六个水分子构成的八面体场中,Mn(H2O)62+和H2EDTA2-离子间通过氢键构成三维网状结构.     

Cr(Ⅲ),Fe(Ⅲ),Al(Ⅲ),Cu(Ⅱ)草酸配合物热分析研究

目的　研究配合物K3[Fe(C2O4)3]·3H2O,K3[Cr(C2O4)3]·3H2O,K3[Al(C2O4)3]·3H2O和K2[Cu(C2O4)2]·2H2O的热分解过程及机理。方法　采用热分析方法对这4个配合物热分解过程进行研究,用Ozawa Flynn Wall,Friedman,ASTME6983种方法计算出每一步热分解反应的活化能(Ea)和指前因子(lgA)。结果　得出了这4个配合物每一步的热分解反应,并用上述3种方法计算了每一步的活化能和指前因子。结论　这4个配合物第1步热分解都是失去水,但Al,Fe,Cr配合物脱水过程的活化能大小与热解脱水的温度变化趋势基本一致,反映了配合物中水分子结合的难易程度;Cu配合物脱水温度均高于Al,Fe,Cr的配合物。这可能是由于Cu配合物中两个水分子参与配位,而其他配合物中的水为结晶水的缘故。     

苯并15冠5配合物:[Na(B15C5)·H2O]2 [Zn(NCS)4]的合成与晶体结构

合成了苯并15-冠-5(B15-C-5)的配合物[Na(B15C5)·H2O]2[Zn(NCS)4],通过元素分析、红外光谱、X-射线单晶结构衍射对配合物进行了表征.该配合物为单斜晶系,空间群C2/C,晶体学结构数据a=1.6924(5)nm,b=1.2998(4)nm,c=2.1483(4)nm,β=112.352(6)°,V=4.371(2)nm3,Z=4,Dc=1.389mg/m3,F(000)=1896,R1=0.0657,wR2=0.1783.结构分析表明Na+与B15-C-5分子中氧原子配位成键,阴离子为[Zn(NCS)4]2-具有四面体构型.两个[Na(B15C5)·H2O]+配阳离子与一个[Zn(NCS)4]2-配阴离子通过离子键形成中性配合物.     

铕、铽-水杨酸-邻菲罗啉稀土配合物的合成、表征及荧光性质

在无水乙醇溶液中合成了铕、铽 -水杨酸 ( HSal) -邻菲罗啉 ( Phen)混合稀土配合物 ,通过元素分析 ,红外光谱 ,摩尔电导等实验 ,确定配合物的化学组成为 RE( Phen) 2 ( Sal) 2 Cl· H2 O( RE=Eu3 ,Tb3 ) .在 351 nm紫外光激发下 ,研究了稀土配合物的荧光 ,结果表明铕和铽之间存在相互作用 ,荧光发射强度有较大的变化 ,铕对铽具有很强的猝灭作用 ,铽对铕具有很强的敏化作用 .实验证明该混合配合物可以发出强度很高的红色荧光     

超分子化合物［Mn(H2O)6］(C13H10NO4S)2 的合成、晶体结构及热稳定性研究

在CH3CH2OH/CH3OH溶剂中合成了标题配合物［Mn(H2O)6］(C13H10NO4S)2{C13H10NO4S = 4-［ (2-羟基-亚苄基)-氨基］-苯磺酸阴离子},利用元素分析、红外光谱、X-射线单晶衍射和热分析等手段对配合物进行了表征.结果表明,该化合物属单斜晶系,空间群为P121/c1 , 其晶胞参数：a = 0. 633 48(2) nm, b = 3.564 08(8) nm, c = 0.944 25(3) nm, β = 131.790(2) ° , V = 1.589 53(8) nm3, Z = 2.在标题配合物中,Mn2+离子与6个配位水的6个氧原子配位形成畸变的八面体构型.脱质子的席夫碱并未参与配位,而是作为抗衡阴离子存在于配合物晶体结构中,从而使整个配合物呈电中性.     

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