亚乙基-1,2-双氨基二硫代甲酸苄酯化合物的合成及生物活性研究

在无水磷酸钾存在下,以丙酮为溶剂,乙二胺和二硫化碳反应后再分别与苄溴、2-氯苄氯、4-氯苄氯、2,4-二氯苄氯在室温下反应,以较好收率合成了亚乙基-1,2-双氨基二硫代甲酸取代苄酯（4a-d）,其结构通过1H NMR、IR、MS和元素分析表征;初步生物活性实验结果表明化合物（4a-d）有较好的抑菌作用.     

3-甲酰基色酮缩2-氨基芴席夫碱的合成与表征

原料芴经硝化、还原得到2-氨基芴,再与3-甲酰基色酮缩合得到相应的席夫碱化合物,利用IR,1H NMR和MS证实了目标化合物的结构,经体外抗活性研究表明,该席夫碱化合物有较强的抑菌活性.     

嫁接型材料的制备及其催化性能

应用超声波技术在温和条件下以氯丙基三甲氧基硅烷为偶联剂,制得了二乙烯三胺、Schiff碱配体和过渡金属Zn,Fe和Co的N,N -双水杨醛缩二乙烯三胺席夫碱配合物嫁接的SiO2.应用IR和UV - Vis技术对其进行了表征.结果表明,嫁接型配合物的红外光谱呈现出胺基和席夫碱相应基团的特征吸收,配体和配合物紫外光谱之间的差别表明配合物结构的存在.将所制得的样品在二氧化碳和环氧丙烷的环加成反应中进行了催化性能的测试,结果表明嫁接型席夫碱配合物配体和过渡金属离子对样品的催化活性均有影响.席夫碱配合物的催化活性普遍高于SiO2/二乙烯三胺和SiO2/Schiff碱的活性.     

5-甲氧基水杨醛缩3-羟基-2-萘甲酰肼席夫碱的合成及其荧光性质研究

通过加成-消除反应合成了5-甲氧基水杨醛缩3-羟基-2-萘甲酰肼席夫碱,通过IR、¹H NMR和元素分析对其结构进行了表征.并对其与不同金属离子如Ag⁺、Ni²⁺、Pb²⁺、Cu²⁺、La³⁺、Ce³⁺、Cd²⁺、Zn²⁺、Sr²⁺等作用前后的荧光性质进行了研究.实验结果表明,不同的金属离子能使该席夫碱荧光强度发生不同程度的改变.Ag⁺使席夫碱的荧光强度略有增强,其他金属离子则使席夫碱的荧光强度发生不同程度的减弱,Pb²⁺与席夫碱作用后荧光强度降低最大,甚至发生荧光猝灭现象.     

N，N—对苯二胺基（2—羟基）二苄基膦酸四乙酯的合成及结构表征

以水杨醛，对苯二胺为起始原料合成席夫碱后，用亚磷酸酯与席夫碱加成合成α-氨基膦酸酯类阻燃剂N，N-对苯二胺基（2-羟基）二苄基膦酸四乙酯，产物经IR，∧1H-NMR ∧31P-NMR,MS确证。     

2-乙氧基苯甲醛缩4-氨基安替比林席夫碱的合成及其荧光性质研究

通过加成-消除反应合成了2-乙氧基苯甲醛缩4-氨基安替比林席夫碱,通过IR、¹H-NMR和元素分析对其结构进行了表征.并对其与Zn²⁺、Cu²⁺、Co²⁺、Ni²⁺、La³⁺、Ce³⁺、Sr²⁺、Pb²⁺、Cd²⁺、Ru³⁺、Ag⁺等金属离子作用前后的荧光性质进行了研究.实验结果表明,金属离子的加入对2-乙氧基苯甲醛缩4-氨基安替比林席夫碱的荧光发射波长影响不大,但荧光强度发生了不同程度的改变.其中Cu²⁺与席夫碱络合后的荧光强度增强显著.     

苯基吡唑缩单胺类席夫碱衍生物的合成和电化学、光物理性能

为寻找更好的苯基吡唑类席夫碱衍生物的发光材料,以苯基吡唑为结构母体设计合成了6种苯基吡唑缩单胺类席夫碱系列衍生物.通过IR,~1H NMR,MS和元素分析等对这6种目标产物进行了表征,其中1-(2,6-二氯-4-三氟甲基-苯基)-5-[(2-羟基亚苄基)-氨基]-1H-吡唑-3-甲腈,即APY(PhOH)的结构进一步通过单晶衍射确证,并测试了其紫外、荧光光谱,探讨了其电化学性质和光物理性能.结果表明:6种苯基吡唑缩单胺类席夫碱衍生物的结构与设计相符,具有有效的共轭结构与发光效能,是良好的发光材料,为设计合成具有优良发光性能的共轭型有机发光材料奠定基础.     

氨基苯氧乙酸乙酯类席夫碱的合成及其生物活性

合成五种新的p-氨基苯氧乙酸乙酯与芳醛生成的席夫碱．对其产率、物理性质作了首次报道，并对其UV、IR、1HNMR、元素分析做了表征．初步生物活性测试表明此类席夫碱化合物具有较好的植物生长激素活性．     

Mn-水杨醛配合物的制备及其催化环烯烃环氧化的研究

合成出Mn-水杨醛席夫碱配合物催化剂,采用1H NMR,13C NMR,元素分析和IR等手段对催化剂进行表征.催化环烯烃环氧化反应以过氧化氢为氧化剂,DMF为溶剂,0.2 mol/L Na2HPO4为缓冲溶液,在常压下进行反应.结果表明,20℃反应3 h,环己烯和环辛烯分别取得了77.9%和63.5%的烯烃转化率,同时有84.5%和99.2%的环氧化物生成.1     

N,N'-二(5-溴亚水杨基)-2,6-吡啶二氨及其Cu(Ⅱ),Zn(Ⅱ)配合物的合成与表征

合成了N．N’-二(5-溴亚水杨基)-2,6-吡啶二氨席夫碱及其Cu(Ⅱ),Zn(Ⅱ)的配合物．用元素分析、IR、摩尔电导和电子光谱对所得化合物进行了表征．对席夫碱配体还进行了^1H NMR和MS表征,给出了化合物可能的空间结构。     

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