铽(Ⅲ)1,2-二(6-羧基吡啶-2-甲胺基)乙烷配合物的合成与发光性质

合成了一种含线状N4O2配位点的配体1,2-二(6-羧基吡啶-2-甲胺基)乙烷(H2L),通过红外光谱、核磁共振谱对其结构进行了表征. 以H2L为配体与Tb(Ⅲ)合成了环状结构的二元配合物和以2,2′-联吡啶(bipy)为第二配体的三元配合物,并通过红外光谱、差热-热重分析和荧光光谱对配合物进行了表征及发光性质研究. 结果表明：所有配合物均能发射Tb(Ⅲ)的特征光谱,最强发射峰在545 nm左右,配体极好地敏化了稀土离子的发光. 第二配体的引入使三元配合物的荧光强度明显大于二元配合物的荧光强度.     

四(对甲氧基苯基)卟啉钴的合成及表征

以对甲氧基苯甲醛与吡咯为原料、丙酸为溶剂、氯乙酸为催化剂,合成四(对甲氧基苯基)卟啉及其钴配合物,用元素分析、紫外-可见光谱、红外光谱、1H核磁共振对化合物进行表征.结果表明,所合成的四(对甲氧基苯基)卟啉及四(对甲氧基苯基)卟啉钴配合物的结构与设计的结构相符;该配体及配合物的荧光光谱数据表明,相对荧光强度是四(对甲氧基苯基)卟啉四(对甲氧基苯基)卟啉钴四苯基卟啉.     

3,5-二溴水杨醛缩邻苯二胺及其配合物的合成与谱学性质

合成了3,5-二溴水杨醛缩邻苯二胺配体H2L(L=C20H10N2O2Br4)及其铜(II)、镍(II)的配合物ML.Py(M为Cu和Ni;Py为吡啶)和锌的配合物[ZnL.Py].DMF,并用元素分析、红外光谱、紫外-可见光谱对它们进行了表征,同时用质谱、核磁共振谱对配体进行了表征。研究结果表明配合物为五配位,吡啶分子参与了配位。     

配合物[Ni(EDTB)](NO3)2·2C2H5OH·H2O的合成表征及对尿素水解的影响

报道了对称六齿配体N,N,N',N',-四(2'-苯并咪唑甲基)乙二胺(EDTB)的含镍(Ⅱ)配合物[Ni(EDTB)](NO3)2*2C2H5OH*H2O的合成、表征及其对尿素水解的影响.根据配合物元素分析、摩尔电导、紫外-可见红外、ESR谱和循环伏安等性质与已测X-射线单晶结构的同种配体含铜(Ⅱ)单核配合物比较,推测此配合物中的Ni(Ⅱ)离子被配体EDTB的4个苯并咪唑(Bzim)氮和2个烷胺氮配位,形成一种畸变八面体几何构型.并用气相色谱法观测了此配合物对尿素水解反应的影响,结果表明它几乎无催化尿素水解的活性,证明配位饱和可以抑制脲酶活性.     

一种新型含硫杂环的金属配合物的合成与表征

合成了由二硫代肼基甲酸苄酯和2-乙酰基吡嗪缩合的新型含硫杂环席夫碱配体C14H14N4S2及它们与Ni(Ⅱ)形成的配合物C28H26N8S4Ni.通过元素分析、红外光谱、紫外可见光谱等测试手段对合成的配体和配合物进行了表征,结果表明:配体固态时以硫酮式存在;金属配合物为畸变八面体结构.     

脲酶模型化合物合成、表征及对尿素水解的影响

报道了对称六齿配体N,N,N＇,N＇-四(2′-苯并咪唑甲基)乙二胺(EDTB)的两种含镍(I)配合物[Ni(EDTB)](ClO4)2@3H2O和[Ni(EDTB)]C12@2H2O@3C2H5OH的合成、表征及其对尿素水解的影响.根据配合物元素分析、摩尔电导、紫外-可见(UV-Vis)、红外(IR)、ESR谱和循环伏安(CV)等性质与已测X-射线单晶结构的同种配体含铜(I)单核配合物比较,推测此两种配合物中的Ni(I)离子被配体EDTB的4个苯并咪唑(Bzim)氮和2个烷胺氮配位,形成一种畸变八面体几何构型.并用气相色谱法观测了此两种配合物对尿素水解反应的影响,结果表明它们几乎无催化尿素水解的活性,证明配位饱和可以抑制脲酶活性.     

稀土与对硝基苯乙酸及2,2′-联吡啶三元配合物的合成、光谱表征

本文以乙醇为溶剂合成了稀土元素(RE=Tb,Eu,Sm)与对硝基苯乙酸(HL)、2,2′-联吡啶(bipy)的三元固体配合物,通过元素分析等手段确定了稀土配合物的组成为REL3bipy.2H2O,用红外光谱、紫外光谱、热分析对该类配合物的结构与性质进行了表征,红外光谱表明配体以-COO-的形式与中心离子配位,同时这一点也被自由配体和配合物的UV谱所证实。     

稀土与对硝基苯乙酸及2,2''''-联吡啶三元配合物的合成、光谱表征

本文以乙醇为溶剂合成了稀土元素(RE=Tb,Eu,Sm)与对硝基苯乙酸(HL)、2,2'-联吡啶(bipy)的三元固体配合物,通过元素分析等手段确定了稀土配合物的组成为REL3bipy·2H2O,用红外光谱、紫外光谱、热分析对该类配合物的结构与性质进行了表征,红外光谱表明配体以-COO-的形式与中心离子配位,同时这一点也被自由配体和配合物的UV谱所证实.     

双核镍配合物〔Ni_2(DTPB)(C_2O_4)〕·(ClO_4)_2·CH_3CH_2OH·2H_2O的合成、表征和性质

报道了八齿配体N,N,N′,N",N"-五(2-苯并咪唑甲基)-二乙三胺(简写为DTPB)及其含镍双核配合物〔Ni2(DTPB)(C2O4)〕·(ClO4)2·CH3CH2OH·2H2O( )的合成.对( )进行了元素分析、摩尔电导、紫外、可见光谱、红外光谱、自旋共振谱和循环伏安研究.推测配合物中每个镍离子( )为六配位的八面体结构.     

钠诱导的两个钴配合物的合成、结构及性能研究

选择多齿阴离子HXTRA4-为配体,通过分子自组装方法,得到两个钴配合物,[Na(H2O)3Co(HX-TRA)]n(1)和{[Na2(H2O)2Co2(HXTRA)2]·3.5H2O}n(2),并对其进行了元素分析、红外光谱、紫外光谱及X-射线单晶结构表征.结果表明,钠离子在两个配合物的形成过程中起到了关键作用.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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