SiO2负载环硫乙烷铑配合物的合成与催化性能

本文通过4-氧杂-6,7-环硫庚基三甲氧基硅烷依次与气相法二氧化硅及水,三氯化铑反应,合成了聚-4-氧杂-6,7-环硫庚基硅氧烷铑配合物.研究了其对烯烃硅氧加成反应的性能.     

有机硅聚合物负载硫、氮双齿钯（0）配合物的合成与 …

４－氧杂－６，７－环硫庚基三甲氧基硅烷依次与二乙胺、气相法二氧化硅及水、氯化钯反应，接着用水合肼还原，合成了聚－４－氧杂－６－巯基－７－二乙胺基庚基硅氧烷钯（０）配合物。研究了其在Ｈｅｃｋ芳基化反应中的催化特性。     

PAMAMSA-M树枝状配合物作用下环己烯的催化氧化

合成了12种PAMAMSA(1～6G) M(PAMAM为聚酰胺 胺,SA为水杨醛,G为代数,M分别为Fe3 ,Co2 离子)树枝状高分子催化剂.在101 325kPa、70℃和无溶剂条件下,这些催化剂对环己烯分子氧氧化反应的催化效果良好.反应以7 氧杂二环[4,1,0]己烷(1),2 环己基 1 醇(2),2 环己基 1 酮(3)和7 氧杂二环[4,1,0]己烷 2 酮(4)为主要产物.其中产物7 氧杂二环[4,1,0]己烷 2 酮(4)为此类氧化反应中首次报道的新产物.     

一个多用途吡咯烷类氮杂糖中间体的不对称合成

报道了多用途的吡咯烷类氮杂糖中间体6的不对称合成.起始原料(2R,3R,4S)-2-苄氧甲基-3,4-二苄氧基-5-氧代吡咯烷-1-羧酸叔丁酯(8)由手性合成砌块酒石酸酰亚胺7按照先前本实验室报道的方法经4步得到.活化的酰胺8经乙烯基加成、立体选择性还原、环化、氧化断裂双键成醛以及还原醛成醇等步骤得到了氮杂糖中间体(2R,3R,4R,5R)-2-羟甲基-3,4-二苄氧基-5-苄氧甲基吡咯烷-1-羧酸叔丁酯(6).从活化的酰胺8出发,经过5步反应,立体选择性地合成了氮杂糖中间体6,总产率46%.中间体6可用于多个吡咯烷类氮杂糖的合成.     

微波促进下氧杂蒽类化合物合成研究

研究了乙酸酐催化下微波促进的芳香醛与4-羟基-6-甲基吡哺酮的无溶剂缩合反应,并通过这一反应合成了一系列氧杂蒽类衍生物.与文献方法相比,所报道的方法具有收率高、后处理过程简单以及对环境友好等优势,从而为氧杂蒽类化合物的合成提供了1条经济实用的新方法.     

聚硅氧烷负载双齿膦铂配合物的合成及其在碳－硫键形成反应中的催化性能

合成了一种高分子负载型催化剂——聚－４－氧杂－６，７－双二苯膦基庚基硅氧烷铂配合物，研究了其在碳－硫键形成反应中的催化特性．在标题化合物和无水碳酸钠存在下，巯基化合物与卤化物在丙酮中回流能高产率地生成相应的硫醚     

聚硅氧烷负载双齿膦铂配合物的合成及其在碳—硫键 …

合成了一种高分子负载型催化剂－聚－４－氧杂－６，７－双二苯膦基庚基硅氧烷铂配合物，研究了基估碳－硫键形成反应中的催化特性。在标量化合物和无水碳酸钠存在下，巯基化合物与经物在丙酮中回流高产率地生成相应的硫醚。     

新型四取代酞菁及金属酞菁的合成与表征

以4-硝基邻苯二腈（1）、3-硝基邻苯二腈（4）和2-异丙基-5-甲基苯酚（2）为起始化合物,在氢氧化锂的作用下,经亲核取代反应生成了相应的邻苯二腈衍生物（3）和（5）.以化合物（3）和（5）为前体,在催化剂1,8-二氮杂二环[5,4,0]十一碳-7-烯（DBU）的作用下发生环合四聚反应,得到了具有优良溶解性的四取代酞菁,铟氯酞菁和钛氧酞菁6a-6c,7a-7c.并分别用氢核磁、质谱、紫外可见光谱和元素分析确认了这些化合物的结构.     

掺硼金刚石中硼和石墨相含量对燃料电池阴极催化性能影响

掺硼金刚石是一种理想的燃料电池氧还原反应非金属催化剂阴极材料.报道了掺硼金刚石中硼含量以及sp~2杂化的石墨相含量与氧还原反应电位、电流密度之间的关系.研究结果表明,掺硼金刚石中一定含量的硼对催化氧还原反应活性有积极作用.随着硼含量的增加,氧还原反应电位无明显变化,反应活性先增大后减小,变化规律与催化位点和台阶原子密度两个因素有关.sp~2杂化石墨相有利于氧还原反应活性电位向正向移动.     

2，9-二（n-2＇，5＇-二氮杂庚基）-1，10-菲罗啉镍（Ⅱ）配合物的合成、晶体结构及生物活性研究

解析了 2 ,9-二 ( n-2′,5′-二氮杂庚基 ) -1 ,1 0 -菲罗啉镍 ( )配合物的晶体结构 ,晶体属于单斜晶系 ,空间群为 P2 ( 1 ) /n,a=1 .2 5 1 0 ( 4) nm,b=1 .3 5 0 1 ( 5 ) nm,c=1 .6849( 5 ) nm,β=1 0 6.5 67( 6)°,V=2 .72 77( 1 6)nm3,Z=4,镍 ( )离子与配体的六个氮原子同时配位 ,形成变形八面体构型 ,Cl O- 4离子的氧原子与邻近的仲胺氮原子上的氢原子之间存在分子间氢键作用 .用紫外 -可见分光光度计研究了其与 DNA的相互使用 ,采用改进的邻苯三酚自氧化法研究了其对超氧阴离子自由基 O- .2 的抑制作用 ,结果表明该配合物能以插入模式与 DNA发生作用 ,并能有效地抑制超氧阴离子自由基 O- .2 的生成     

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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