2-(1-环己烯基)环己酮合成反应的动力学

研究了环己酮在NJ-1固体酸催化剂作用下合成2-（1-环己烯基）环己酮的反应规律,考察了反应温度、催化刑用量和移走反应生成的水对反应的影响,由实验数据按照二级连串反应拟合估算了动力学参数,建立了由环己酮合成2-（1-环己烯基）环己酮的主、副反应动力学模型,模型计算值与实验值拟合良好。     

砜基碳负离子的选择性环合反应

比较1，1－双（2－叔丁基砜乙基）十二烷基苯基砜（1）双碳负离子在不同条件下的环合反应结果，控制反应条件，在铁催化下可以生成偶联糁烯化的环烯产物（2）为主要产物；不加催化剂，加热回流反应得到分子内亲核取代反应产物环丙烷化合物（3）。     

微乳条件下催化氨肟化合成环己酮肟

钛硅分子筛催化环己酮氨肟化反应制备环己酮肟，是一种环境友好的绿色化学工艺．针对该反应在浆态条件下进行时存在的固液分离和溶剂回收等问题，尝试采用微乳化的方法加以解决．分别以十二烷基硫酸钠／水／氨水／环己酮和二-（2-乙基己基）磺基琥珀酸钠／水／氨水／环己酮的水包油型微乳液作为反应介质，实现了钛硅分子筛催化环己酮的氨肟化反应．通过实验考察了温度对选择性和转化率的影响及对钛硅分子筛催化活性和稳定性的影响．结果表明，微乳条件下的环己酮氨肟化反应可以得到较好的效果，并且在反应效果方面以二-（2-乙基己基）磺基琥珀酸钠制备的微乳液占优．     

焙烧处理对HZSM-5负载金属催化剂脱氢活性的影响

研究焙烧温度对HZSM-5负载金属催化剂表面性质及对环己酮二聚物脱氢反应活性及结焦性能的影响,结果发现Pd／HZSM-5于600℃焙烧3h后,催化剂具有良好的脱氢能力和抗结焦能力,环己酮二聚物的转化率达到90％以上,邻苯基苯酚(OPP)的选择性高于91％。     

2-(1-环己烯基)环己酮合成装置的改进

以环己酮为原料,催化缩合制备2-(1-环己烯基)环己酮。对不同的反应装置得到的产物组成及反应速度进行讨论,提出一种改进的反应装置,其反应速率较快,所需反应时间,较少。     

铁卟啉的空间效应对其催化羧基化反应性能的影响

研究了ＴＰＰＦｅＣｌ和６种具有不同空间结构的氧合、中位四（邻烷基苯基）卟吩合铁（Ⅲ）［Ｔ（ＯＲ）ＰＰＦｅＣｌ，Ｒ＝ｍＥ，ｅＴ，ｎ－Ｐｒ，ｎ－Ｂｕ，ｉ－Ｐｒ和ｔ－Ｂｕ］催化亚碘酰苯使己烷羟基化反应发现邻位位烷基取代的铁卟啉的催化速率和催化产率都比ＴＰＰＦｅＣｌ的大。     

Pd(Ⅱ)/BQ催化环己烯氧化合成环己酮的反应机理

在乙腈的酸性水溶液中，考察了Pd（OAc）2、Pd（NO3）2、PdCl2和苯醌（BQ）组成的催化体系在环己烯氧化合成环己酮反应中的催化活性，探索了酸度对Pd（OAC）2／BQ催化活性的影响．结果表明，Pd（OAc）2／BQ和Pd（NO3）2／BQ对环乙烯氧化合成环己酮显示了较高的催化活性，而PdCl2／BQ的活性则较低，无水和无酸存在的溶液中，Pd（OAc）2／BQ对环己烯氧化未显现任何催化活性．并用紫外可见光谱（UV－Vis）、循环伏安法考察了该催化体系的作用机理     

1—苯氧基乙酰基—3,5—二取代吡唑衍生物的合成

于固－液相转移催化条件下,以ＰＥＧ－４００为催化剂,通过苯酚与氯乙酸乙酯反应合成了苯氧基惭酸乙酯（Ⅰ）,（Ⅰ）与８５％的水合肼作用得到相应的酰肼（Ⅱ）（Ⅱ）分别与乙酰丙酮和２－噻吩甲酰三氟丙酮反应,得到１－苯氧基乙酰基－３,５－二甲基吡唑（Ⅲ）－１－苯氧基乙酰基－３－三氟甲基－５－（噻吩－２－基）吡唑（Ⅳ）,产物结构通过元素分析和光谱鉴定已得到证实。     

催化显色光度法测定痕量铜

在乙酸－乙酸钠（pH5．8）介质中活化剂邻菲罗啉存在下，铜（Ⅱ）催化过氧化氢氧化邻氨苯酚显色，建立了催化显色光度法测定痕量铜的新方法，在19℃下反应8min，测定的线性范围为0．005－0．18mg／L铜（Ⅱ），回归方程为A＝0．2793c－0．006，相关系数为0．9988，方法用于自来水、野生甜茶、罗汉果中铜的测定，结果满意。     

铁卟啉的空间效应对其催化羟基化反应性能的影响

研究了ＴＰＰＦｅＣｌ和６种具有不同空间结构的氯合、中位四（邻烷基苯基）卟吩合铁（Ⅲ）［Ｔ（ｏ－Ｒ）ＰＰＦｅＣｌ，Ｒ＝Ｍｅ、ＥＴ、ｎ－Ｐｒ、ｎ－Ｂｕ、ｉ－Ｐｒ和ｔ－Ｂｕ］催化亚碘酰苯使环己烷羟基化反应。发现邻位烷基取代的铁卟啉的催化速率和催化产率都比ＴＰＰＦｅＣｌ的大，这７种铁卟啉的催化速率和催化产率（％）大小顺序分别为［Ｔ（ｏ－Ｒ）ＰＰＦｅＣｌ，Ｒ＝］ｉ－ｐｒ＞Ｅｔ＞ｔ－Ｂｕ＞ｎ－ｐｒ＞Ｍｅ＞ｎ－Ｂｕ＞ＴＰＰＦｅＣｌ和ｉ－Ｐｒ（５８）＞Ｅｔ（５７）＞ｎ－Ｐｒ（５２）＞Ｍｅ（５０）＞ｎ－Ｂｕ（４８）＞ｔ－Ｂｕ（４６）＞ＴＰＰＦｅＣｌ（３５），根据研究结果，认为邻位烷基的空间作用可能加速了铁卟啉与亚碘酰苯加成中间体中碘—氧键断裂，助进了高价铁氧酰活性中间体形成，提高了催化速率和催化产率。     

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