4—溴—3,5—二羟基苯甲酸的合成与结构表征

４－溴－３,５－二羟基苯甲酸是嘧啶类药物的中间体,以３,５－二羟基苯甲 原料合成了它并用质谱进行了表征,同时对反应条件也进行了一定探索。     

新显色剂3,5-二溴-4-偶氮对苯二酚苯基荧光酮的合成及其分析性能研究

介绍了新试剂 ２,３,７－ 三羟基－ ９－ ［３,５－ 二溴－ ４－ （２,５－ 二羟基）苯偶氮］苯基荧光酮（ Ｄ Ａ Ｒ Ｐ Ｆ）的合成通过元素分析、红外光谱和紫外可见吸收光谱等方法测试,确定了该试剂的组成和结构研究了试剂的物理特性及与一些高价金属离子显色反应的光度性质     

4-溴3,5-二甲氧基苯甲醛的合成

以３,５－二羟基苯甲酸为原料经溴代、甲基化、缩合及氧化四步反应合成４－溴３,５－二甲基氧苯甲醛,总收率为１９．５％。     

2—双烷硫基亚甲基—5,5—二甲基—1,3—环己二酮与Grignard试剂...

用具有不同烷硫基的２－双烷硫基亚甲基－５，５－二甲基－１，３－环己二酮在丙基、２－甲基烯丙基、苯基卤化镁等Ｇｒｉｇｎａｒｄ试剂反应，对加成反应取向进行了初步考察。     

8—羟基喹啉衍生物的合成

2－甲基－8－羟基喹啉通过氯甲基化反应合成了2－甲基－5－氯甲基－8－羟基喹啉，收率65％。8－羟基喹啉通过先溴化生成5，7－二溴－8羟基喹啉，再与丁基锂作用生碾主基锂，然后与亲电试剂环氧乙烷或N，N－二甲基甲酰胺（DMF）分别作用合成了5－（2－羟乙基）－7－溴－8羟基喹啉，收率分别为70％和66％。     

新的5，3＇，5＇－三羟基7－甲氧基黄酮及其一，二和三苄氧基衍生物的合成

通过３．５－二苄氧苯甲酸－２，６－二羟基－４－甲氧基苯丙酮酯进行Ｂａｋｅｒ－Ｖｅｎｋａｔａｒａ－ｍａｎ重排，环化合成了５，３＇，，５，三苄氧基７－甲氧基黄酮，然后选择性地和全部地脱节基得到５，３＇，５＇－三羟基－７－甲氧基黄酮及其一和二苄基衍生物．     

芳甲酰基烯酮—1,2—亚乙二硫基缩酮与Grignard试剂的共轭加成反应

研究了芳甲酰基烯酮－１，２－亚乙二硫基缩酮与乙基、丙基、丁基等Ｇｒｉｇｎａｒｄ试剂的加成反应，实验结果表明，该反应可以发生１，４－加成而得到一个羰基保护起来的β－二酮，为合成各种结构的β－二酮类化合物提供了一个很好的方法。     

钒-9-(3,5-二溴)水杨基荧光酮-溴化十六烷基三甲基铵显色反应的研究及其应用

研究了钒－９－（３,５－二溴）水杨基荧光酮－ＣＴＭＡＢ三元配合物的显色反应条件,在ｐＨ５．５的六次甲基四胺－ＨＣｌ缓冲溶液中,钒与试剂形成１∶２的配合物,其最大吸收波长λｍａｘ＝５５７ｎｍ,表观摩尔吸光系数为ε＝１．８１×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,钒含量在０～９μｇ／２５ｍｌ范围内符合比耳定律．采用适当的分离手段,测定了钢样中的微量钒,结果满意．     

N，N—1，3—二溴—5，5—二甲基乙丙酰脲对醇及α一羟基酯的氧化作用

报道了N，N－1，3－二溴－5，5－二甲基乙丙酰脲对羟基的氧化作用，结果表明N，N－1，3－二溴－5，5－二甲基乙丙酰脲对醇及仲醇生成相应的醛或酮；氧化α一羟基酸生成少一个碳醛或酮；而氧化α－羟基酯则生成相应的酮酯，当含有β－H时，氧化的同时发生溴代，一步生成溴代酮酯，该氧化剂性能优良，反应温和，产率明显同于NBS，如氧化溴化乳酸生成重要的医药、农药中间体α－溴代的丙酮酸酯，产率高达83％。     

选择性去甲醚化反应—3，5—二甲氧基4—羟基甲苯甲酸甲酯的新合成方法

报道利用复合试剂无水氯化锌和丙酸可选择性地脱去3,4,5－三甲氧基4－羟基苯甲酸甲酯的4位甲氧基,较高收率的得到3,5－二甲氧基4－羟基苯甲酸甲酯。     

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     

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