新型U型双四硫富瓦烯衍生物的合成及其光诱导电子转移反应

4,5-（2′-氰乙基硫基）-6,7-二丁硫基四硫富瓦烯在甲醇钠的作用下消除一个氰乙基生成四硫富瓦烯衍生物的单钠盐,此单钠盐再与9,10-二（氯甲基）蒽反应生成新型U型双四硫富瓦烯衍生物。实验结果表明,这种新型U型双四硫富瓦烯衍生物与C60之间产生光诱导电子转移反应使其荧光显著增强。     

"一桥"和"二桥"-双(四硫富瓦烯衍生物)的合成与性质

目的研究合成有机导体“桥式”四硫富瓦烯衍生物的方法。方法以6,7-二(2'-氰乙硫基)-2,3-二甲硫基四硫富瓦烯为原料,在醇钠的作用下分两次消去氰乙基生成硫负离子。第一次生成的硫负离子与对二氯甲苯反应生成一种新的“一桥”-双四硫富瓦烯衍生物,该衍生物再分别与醇钠和对二氯甲苯反应生成另一种新的“二桥”-双四硫富瓦烯衍生物。结果“一桥”和“二桥”- 双(四硫富瓦烯衍生物)有特殊的电化学性质和很强的紫外吸收。结论为“桥式”四硫富瓦烯衍生物的合成提出了一种新方法。     

两种不对称四硫富瓦烯衍生物的合成、结构及电化学行为研究

以1,3-甲基二硫基-二硫醇-2-硫酮(化合物1)和1,3-环戊烯二硫基-二硫醇-2-硫酮(化合物5)为原料,在P(OEt)3存在下,分别与1,3-二(氰乙硫基)-二硫醇-2-氧酮(化合物3)发生不对称偶联,得到了两个新型的不对称四硫富瓦烯衍生物(化合物6a和6b).对二者进行了熔点、IR、1H NMR、13C NMR、MS、EA等表征,解析了其晶体结构,并对它们的电化学行为做了初步的研究.     

四硫富瓦烯衍生物的合成及性质研究

合成了一种新的四硫富瓦烯衍生物2，3-(二硫亚乙基)-6-(硫丁氧基对苯亚甲基巴比妥)四硫富瓦烯，通过核磁、红外、元素分析等进行了表征，并研究了其在溶液中的聚集行为及电化学性质。     

2,3-二甲氧羰基-6,7-二氰基四硫富瓦烯衍生物合成

在亚磷酸三乙酯存在下,利用高度稀释技术,通过4,5-二氰基-1,3-二硫杂环戊烯-2-酮和4,5-二甲氧羰基-1,3-二硫环戊烯-2-硫酮的交叉偶联反应,成功地合成了关键前躯体二氰基四硫富瓦烯衍生物,用NMR、TOF-Ms和IR表征了其结构,并用循环伏安法和紫外吸收光谱初步评价了四硫富瓦烯衍生物的电化学性质和光物理性质。     

新型三蝶烯衍生物2,3,6,7-四甲基-9,10-邻萘基蒽的合成

目的基于2,3,6,7-四甲基蒽合成了一种新型三蝶烯衍生物2,3,6,7-四甲基-9,10-邻萘基蒽。方法以2,3,6,7-四甲基蒽和1,4-环氧-1,4-二氢萘为原料,通过Diels-Alder反应和脱水作用合成目标产物,对产物进行表征。结果过量的2,3,6,7-四甲基蒽与1,4-环氧-1,4-二氢萘反应,在VAcOH∶VAcOAc=2∶1的混合脱水剂作用下合成了目标产物,表征结果显示化合物结构正确。结论利用廉价易得的原料简便合成了新型三蝶烯衍生物2,3,6,7-四甲基-9,10-邻萘基蒽,它可以作为潜在的适用于聚酰亚胺合成的二酐单体。     

双(6,7-二甲硫基四硫富瓦烯-2,3-二硫) 金属配合物的合成及其电化学性质

以6，7—二甲硫基四硫富瓦烯—2，3—二硫醇盐为配体合成了两种新的双(6，7—二甲硫基四硫富瓦烯—2，3—二硫)金属配合物，利用循环伏安法研究了它们的电化学性质，并讨论了其紫外-可见光谱和形成中性产物的原因。     

2,3,6,7-四甲基三蝶烯的新型有效合成及表征

以苯甲醇和邻二甲苯为反应体系的溶剂,在无水三氯化铝催化作用下,经碳正离子机理反应得到了2,3,6,7-四甲基蒽.然后,将2,3,6,7-四甲基蒽与原位生成的苯炔经Diels-Alder反应生成具有独特三维刚性芳香结构的2,3,6,7-四甲基三蝶烯.最后,用红外光谱(IR)和核磁共振氢谱(1 H NMR)表征了2,3,6,7-四甲基蒽和2,3,6,7-四甲基三蝶烯的结构.     

巴比妥酸衍生物的合成与表征

制得一种新的用于分子识别的底物2，3-(二硫亚乙基)-6-(硫己氧基对苯亚甲基巴比妥)四硫富瓦烯(4)，产物用红外、核磁、元素分析等手段进行了表征，确定了其结构．     

三蝶烯-2,3,6,7-四甲酸二酐的合成与表征

首先,以邻二甲苯和邻苯二甲酸酐为起始原料,经Friedel-Crafts反应、环化和还原反应合成2,3-二甲基蒽;其次,将2,3-二甲基蒽和原位生成的4,5-二甲基苯炔经Diels-Alder反应生成2,3,6,7-四甲基三蝶烯.最后,经氧化、脱水得到具有独特三维刚性芳香结构的化合物——三蝶烯-2,3,6,7-四甲酸二酐.通过红外光谱和1H NMR谱对产品的结构进行表征,结果表明所得谱图与产品结构相符合.     

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     

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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