Dawson结构稀土磷钼钨杂多化合物的合成及表征

用嵌入改性法合成了１０种通式为Ｋ１５Ｈ２［Ｌｎ（Ｐ２Ｗ１６ＭｏＯ６１）２］·ｎＨ２Ｏ,Ｌｎ＝（Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ、Ｇｄ、Ｔｂ、Ｄｙ、Ｙｂ）的新型稀土杂多化合物,通过元素分析、ＩＲ和ＵＶ测定,证明所合成的１０种化合物同属于Ｄａｗｓｏｎ结构,利用ＴＧ－ＤＴＡ及变温ＩＲ技术考察了该系列化合物的热稳定性．     

系列Ln（Ⅲ）—羧基二聚物的电子光谱研究（Ln=Nd,Sm …

报道了自合成的３种含Ｌｎ＾３＋的二聚物晶体Ｎｄ２（ＣＨ３ＣＯＯ）４（ＯＮＯ２）２（Ｃ１２Ｈ８Ｎ２）２（Ａ）,Ｓｍ２（Ｃ６Ｈ５ＣＯＯ）６（Ｃ１２Ｈ８Ｎ２）２（Ｂ）,Ｅｕ２（Ｃ６Ｈ５ＣＯＯ）６（Ｃ１２Ｈ８Ｎ２）２（Ｃ）的ＵＶ－ＶＩＳ－ＮＩＲ光谱数据,依据Ｌｎ＾３＋能级图以及相应光谱项和选律,对各谱带进行了分析指认,并与Ｌｎ＾３＋离子和简单化合物Ｌｎ（ＮＯ３）．６Ｈ２ＨＯ光谱的对比,讨论了配位场对二聚物     

K0.5（NH4）5.5[MnMo9O32].6H2O2的合成及其晶体结构

由ＨＭｎＯ４和（ＮＨ４）６Ｍｏ７Ｏ２４；４Ｈ２Ｏ合成了标题化合物Ｋ０．５（ＮＨ４）５．５「ＭｎＭｏ９Ｏ３２」．６Ｈ２Ｏ用Ｘ－射线测定了晶体结构，该化合物的晶体属三方晶系，空间群Ｒ３２；ａ＝１５．８４６（４），Ｃ＝１２．３９６（３０）Ａ，Ｍｒ＝１６５７．２８，Ｖ＝２６９５．６Ａ＾３，Ｚ＝３，Ｄｃ＝３．８２ｇ／ｃｍ＾３，μ４１．５＝ｃｍ＾－１，Ｆ（０００）＝２９６７和３０２４个可观测衍射「Ｆｐ≥３σ（     

(C_9H_8N)_2[MoO(S_2C_2(CN)_2)_3]·2H_2O的晶体和分子结构

（Ｃ９Ｈ８Ｎ）２［Ｍ０Ｏ（Ｓ２Ｃ２（ＣＮ）２）３］．２Ｈ２Ｏ晶体属于三斜晶系，空间群Ｐ， 晶胞参数：ａ＝ １１．３０５（６），ｂ＝１４．３８４（３），ｃ＝１４．２７８（３）Ａ，ａ＝５６．８６（２），β＝１１４．１１（２），ｙ＝１１１．１２（３） ｐ０ｂｓ＝１．６５４克／厘米３，Ｚ＝２（ρｃａｌｃ＝１．５７６克／厘米３）．晶体结构用Ｐａｔｔｅｒｓｏｎ函数法和Ｆｏｕｒｉｅｓ 合成法解出，经全矩阵最小二乘方精修，偏离因子Ｒ＝０．０４７．结构分析结果说明Ｍｏ原子与三个配 位基的六个硫原子和一个端基氧形成扭歪五角双锥结构．结晶水与［Ｍｏ０（Ｓ２Ｃ２（ＣＮ）２）３］２－络阴 离子和喹啉阳离子之间存在Ｏ－Ｈ…Ｎ和Ｎ－Ｈ…Ｏ氢键。     

钨砷系列杂多蓝的研究Ⅰ——Dawson结构钨砷稀土杂多蓝

利用控制电位电解的方法合成了８种未见文报道的Ｄａｗｓｏｎ结构的钨砷稀土杂多蓝：Ｌｎ２Ｈ２Ａｓ２Ｗ１８Ｏ６２·ｘＨ２Ｏ（２ｅ杂多蓝）和Ｌｎ２Ｈ４Ａｓ２Ｗ１８Ｏ６２·ｘＨ２Ｏ（４ｅ杂多蓝）,其中Ｌｎ＝Ｌａ,Ｃｅ,Ｐｒ,Ｎｄ。通过红外光谱,紫外光谱,极谱,光电子能谱、顺磁共振,热重－差热重对其进行了表征,并进行了结构和性质的研究。结果表明,还原前后杂多酸盐的结构虽有轻微的变化,但热稳定性和在溶液中的稳定     

过渡金属及稀土元素的锌钨，钒钨杂多酸钾热稳定性研究

报道了Ｋ８Ｍ（Ⅱ）ＺｎＷ１１Ｏ４０Ｈ２·ＸＨ２Ｏ及Ｋ１３。［Ｌｎ（ＺｎＷ１１Ｏ３９）２］·ＸＨ２Ｏ，Ｋ９Ｖ３ＣｏＷ９Ｏ４０·ＸＨ２Ｏ和Ｋ１５［ＣＳ（Ｖ３Ｗ９Ｏ３９）２］·ＸＨ２Ｏ的热稳定性研究结果．指出化合物热分解过程分为失水和分解两个阶段给出了各个化合物的热分解温度范围，并对其热稳定性进行了比较．     

α－邻卤代苯基二茂铁甲醇及其氰乙基化反应产物的结构研究

应用Ｘ射线单晶衍射法测定了α－邻卤（Ｆ，Ｃｌ）代苯基二茂铁甲醇Ｃ＿５Ｈ＿５ＦｅＣ＿５Ｈ＿４ＣＨ（ＯＨ）Ｃ＿６Ｈ＿４Ｘ（Ｘ＝Ｆ，Ｃｌ）（Ⅰ）及其与丙烯腈的氰乙基化反应产物：α－二茂铁基邻卤（Ｆ，Ｃｌ）苄基－β－氰乙基醚Ｃ＿５Ｈ＿５ＦｅＣ＿５Ｈ＿４ＣＨ（ＯＣＨ＿２ＣＨ＿２ＣＮ）Ｃ＿６Ｈ＿４Ｘ（Ｘ＝Ｆ，Ｃｌ）（Ⅱ）的晶体结构。描述并讨论了（Ⅰ）和（Ⅱ），氟原子和氯原子的变更所引起的分子结构变化，结果表明，取代卤原子（Ｆ，Ｃｌ）的不同，导致后一种化合物出现两种分子构型。     

钨砷系列杂多蓝的研究Ⅱ——1∶11钨砷双系列稀土杂多蓝

利用控制电位电解的方法合成了４种未见文献报道的杂多蓝,Ｋ１１Ｈ２〔Ｌｎ（ＡｓＷ１１Ｏ３９）２〕·ｘＨ２Ｏ（Ｌｎ＝Ｌａ,Ｃｅ,Ｐｒ,Ｎｄ）,并利用等离子体原子发射光谱等对其进行了元素组成的分析,利用ＩＲ、ＵＶ、极谱、光电子能谱、电子顺磁共振、热重差热等测试手段,对其结构和性质进行了研究．     

稀土金属间化合物Ln4Ni2C5的化学键研究

对稀土－过渡金属间化合物Ｌｎ＿４Ｎｉ＿２Ｃ＿５（Ｌｎ＝Ｅｒ、Ｔｍ、Ｙｂ、Ｌｕ）进行了量子化学研究（采用离散变分Ｘ＿ａ方法）．结果表明：稀土元素Ｌｎ主要以４ｆ轨道相互重迭形成骨架结构．并以５ｄ，６ｓ，６ｐ轨道与Ｎｉ、Ｃ成键。化学键总结果是稀土原子提供电荷，Ｎｉ、Ｃ原子得电荷。稀土原子还形成空心的八面体链。两种结构的存在导致Ｌｎ＿４Ｎｉ＿２Ｃ＿５固体在电磁方面各向异性。     

部分苯甲酸衍生物的Tb（Ⅲ）配合物的发光性质研究

测定了６个苯甲酸衍生物与铽Ｔｂ（Ⅲ）二元化合物Ｔｂ（ＲＣ６Ｈ４Ｃｏ２）３（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）的红外光谱、紫外吸收光谱和荧光光谱,结果表明,在３５０ｎｍ的紫外光激发下配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２〉Ｈ〉ｐ－ＮＨ２〉ｏ－ＯＨ〉ｍ－Ｃｌ〉ｏ－ＣＯＯＨ,并可看到,邻氨基苯甲酸铽配合物除了在本实验中荧光发射最强外,甚至比目前所报道的铽的无机发光材料的发光     

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