S-苯基-S-甲基-N-甲酰基亚砜亚胺化合物的合成

针对目前N-甲酰基亚砜亚胺的合成需要复杂的步骤以及昂贵的反应试剂,文中以S-苯基-S-甲基-NH亚砜亚胺与(溴二氟甲基)三甲基硅烷(TMSCF2Br)为原料,通过改变反应条件,成功地将亚砜亚胺的氮氢键转化为氮碳键,进而简单、高效地合成了S-苯基-S-甲基-N-甲酰基亚砜亚胺.用柱色谱法对反应产物进行分离,并用核磁共振氢谱(1HNMR)、碳谱(13CNMR)、高分辨质谱(HRMS)等对产物进行表征.结果表明,最佳的反应条件为N,N-二甲基甲酰胺(DMF)作溶剂、不需要碱源、25℃下反应30 min,S-苯基-S-甲基-N-甲酰基亚砜亚胺的产率可达55%.该法具有原料易得、步骤简单、条件温和、绿色环保等优点.     

二正丁基亚砜与水杨酸对硝酸钕的协同萃取

有机亚砜(R_2SO)具有与路易士酸配位的能力,多碳亚砜水溶性小有些又可从石油副产物中获得,所以它们作为萃取剂在无机物溶剂萃取方面受到重视。关于二正丁基亚砜(DBSO)和一酸性螯合剂对三价稀土的协同萃取作用,顾翼东对HPZL体系的实验说明DBSO的协萃能力大于TBP;可是D.Dyrssen和J.H.Augustson等对HTTA体系的研究结果表明DBSO的协萃作用明显地弱于TBP。同时,Dyrssen的工作还说明在HTTA体系中DBSO和三价稀土形成的萃合物与TBP所形成的类型相同。有关TBP在水杨酸(H_2SaL)体系中对三价稀土的协同效应已有报导,并确认形成M(HSaL)_3(TBP)_2类型萃合物。为了进一步了解有机亚砜的协萃作用,本     

二(2-乙基己基)亚砜萃取分离钯铂

本文研究了二(2-乙基己基)亚砜萃取剂对盐酸体系中钯、铂的萃取性能。结果表明:在适当的酸度下使用该萃取剂能达到钯、铂定量萃取和分离的目的;它对钯的萃取饱和容量很高;且加入象N_(1923),N_(263)等添加剂后不仅可使萃取加速进行,而且还可进一步提高萃取率;以硫脲作为反萃剂可使萃取剂反复使用,实验证明,二(2-乙基己基)亚砜的煤油溶液具有良好的再生性能。     

二丁基亚砜-磷酸-水三元体系的液液相平衡研究

二丁基亚砜为萃取磷酸的良好溶剂。本文对二丁基亚砜-磷酸-水三元体系在40℃的液液相平衡关系进行了研究,测定了互溶席曲线,联结线及褶点。并将结果与正丁醇-磷酸-水体系进行了比较和讨论。     

正十二烷硫基乙酸对钯的萃取

本世纪六十年代以来,硫醚及亚砜作为一类新型的萃取剂己越来越为人们所重视,并且随着对硫醚及亚砜萃取金属离子性能研究的深入,从单功能团的硫醚或亚砜转向复合官能团的含硫化合物及其氧化物。我们合成了正十二烷硫基乙酸 C_(12)H_(25)SCH_2-COOH(n—laurylthio acetic acid),用它的甲苯溶液对钯进行了液液萃取,测得了该萃取剂对钯具有良好的萃取性能。     

二正戊基亚砜在硝酸溶液中萃取铀、钍和稀土的研究

用二正戊基亚砜的甲苯溶液在硝酸溶液中对铀、钍和一些稀土元素进行了萃取研究。结果表明,稀土元素,即使与铀、钍同时存在于水相中,在0—10M硝酸中,也不被萃取。在所研究的情况中,二戊基亚砜对铀的萃取大大优于对钍的萃取,这使它们的分离成为可能。     

高氯酸铕、六氟磷酸铕二苯亚砜及苯丁基亚砜配合物的荧光光谱

合成了高氯酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７（ＣｌＯ４）３以及六氟磷酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７·（ＰＦ６）３及高氯酸铕苯丁基亚砜Ｅｕ（ＰＢＳＯ）７·（ＣｌＯ４）３配合物．从配合物的荧光激发和发射光谱可以看出：Ｅｕ３＋的发光系配体亚砜敏化所致．二苯亚砜配合物的发光强度高于苯丁基亚砜配合物．５Ｄ０→７Ｆ２谱带在二苯亚砜配合物中发生劈裂，且强度高于５Ｄ０→７Ｆ１，这表明Ｅｕ３＋在二苯亚砜配合物中所处格位对称性较低而在苯丁基亚砜配合物中所处格位对称性较高．     

不对称亚砜萃取和S-烷基异硫脲盐反萃金(Ⅲ)的研究

研究了用正-丁基辛基亚砜萃取、S-丁基异硫脲盐反萃金(Ⅲ)的行为.实验结果表明萃合物的组成为H_3O(n-BOSO)_3AuCl_4,反萃金(Ⅲ)是离子交换机理,金(Ⅲ)萃合物用元素分析、热分析、摩尔电导、UV和IR光谱进行了表征。     

用两相滴定法研究ABB’三元协萃剂对铕（Ⅲ）的协同萃取

本文在黎乐民、徐光宪教授工作的基础上，根据两相体系的物料及电荷平衡原理，进一步导出用A-B-B’三元混合萃取剂协同萃取金属离子的计算公式，并用两种不同的滴定液进行滴定，测定了PM1Bn．P(1-苯基-3-甲基-4-异丁酰基吡唑啉酮-5)与DASO(二戊基亚砜)及TBPO(三丁基氧化礴对铕(I)的协同萃取,     

用两相滴定法研究ABB′三元协萃剂对铕(Ⅲ)的协同萃取

本文在黎乐民、徐光宪教授工作的基础上,根据两相体系的物料及电荷千衡原理,进一步导出用A-B-B′三元混合萃取剂协同萃取金属离子的计算公式,并用两种不同的滴定液进行滴定,测定了PM_iB_uP(1-苯基-3-甲基-4-异丁酰基吡唑啉酮-5)与DASO(二戊基亚砜)及TBPO(三丁基氧化磷对铕(Ⅲ)的协同萃取,所测得的三元协萃常数1g乩_(311)在误差范围内一致。.     

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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