H5GeW11VO40.22H2O的合成与表征

首次采用分步酸化，分步加入原料方法制备出新型混配杂多酸－钨钒锗酸Ｈ５ＧｅＷ１１ＶＯ４０．２２Ｈ２Ｏ。给出了反应的ＰＨ值和物料的最佳比。用化学分析，电位滴定、ＩＲ、ＵＶ，＾５１ＶＮＭＲ，Ｘ射线粉末 热分析对合成产物进行了表征。     

发生在强碱溶液之间的反应H~＋＋OH~－＝H_2O

在传统观念中,只有酸与减溶液才能发生Ｈ＋＋ＯＨ－＝Ｈ２Ｏ的反应．笔者认为：碱与碱,酸与酸,以及任何两种不同ＰＨ值的溶液之间,均可发生Ｈ＋＋ＯＨ－＝Ｈ２Ｏ的反应。     

ICP—AES中无机酸非光谱干扰机理的研究

本文较深入地探讨了无机酸（ＨＮＯ３，ＨＣｌ，ＨＣｌＯ４，Ｈ２ＳＯ４和Ｈ３ＰＯ４）在ＩＣＰ—ＡＥＳ中非光谱干扰的机理。应用相关分析的方法对干扰因子与溶液提升量间的关系进行了分析，结果表明，无机酸引起的干扰效应主要是物理干扰，即由溶液的比重，粘度等物理性质的变化所引起，并建立了酸效应干扰因子与溶液提升量之间关系的酸效应方程。该方程可用于酸效应的校正，而无需采用参比样品的酸浓度匹配手段。     

层柱化合物苯膦酸锆及其衍生物的制备与表征

研究了苯膦酸锆Ｚｒ（Ｃ６Ｈ５ＰＯ３）２·ｎＨ２Ｏ及其混合配体形式的衍生物磷酸苯膦酸锆Ｚｒ（Ｃ６Ｈ５ＰＯ３）２－ｘ（ＨＰＯ４）ｘ·ｎＨ２Ｏ的不同制备方法,其中ｎ,ｘ的值随实验条件的不同而不同。实验证明,这类化合物具有典型的层状结构,而且其层间距离在不同条件下可以有不同的结果。由ＸＲａｙ粉末衍射法及元素分析的结果可知,ＨＦ酸络合法制得的Ｚｒ（Ｃ６Ｈ５ＰＯ３）２·５Ｈ２Ｏ的层间距为１５１ｎｍ;ＨＦ酸络合法和交换法制得的Ｚｒ（Ｃ６Ｈ５ＰＯ３）２－ｘ（ＨＰＯ４）ｘ·ｎＨ２Ｏ的层间距分别为１４９ｎｍ和１５８ｎｍ;当磷酸大大过量时,将形成间层型结构,层间距为２４１ｎｍ。这类化合物的结晶水含量影响层间距,但不影响层状结构及结晶度。     

复盐大单晶NaKV_2O_6的水热合成与表征

在ＮａＯＨ－ＮＨ４ＶＯ３－ＫＩ－Ｈ２Ｏ体系中，以水热法合成了无水偏钒酸复盐ＮａＫＶ２Ｏ６晶体，并进行了结构分析．     

方酸与芳伯胺在有水介质中的脱水缩合反应

与通常的脱水缩合反应条件下而以Ｈ２Ｏ或以Ｈ２Ｏ－ＤＭＳＯ（１：２体积比）为介质,加热下方酸与芳伯胺之间可顺利实现脱水反应。     

用铝土矿生产凝胶型氢氧化铝的新工艺探讨

文章探索了用铝土矿生产硫酸铝，再用硫酸铝以酸法生产凝胶型Ａｌ（ＯＨ）３。在实验的基础上拟定出酸法生产凝胶型Ａｌ（ＯＨ）３的新工艺，并对工艺条件和杂质分离条件进行了探索     

[（N,N—二磷酸亚甲基）甘氨酸—磷酸氢]锆—钯催化剂的催化加…

一类新型负载钯催化剂：［（Ｎ，Ｎ－二膦酸亚甲基）甘氨酸－磷酸氢）锆－钯催化剂由Ｚｒ（ＨＰＯ４）２－ｘ［（Ｏ３ＰＣＨ２）２ＮＣＨ２ＣＯ２Ｈ）］ｘ．Ｈ２Ｏ与ＰｄＣｌ２在甲醇中络合和水合胼还原制得。     

Pb_2SnO_4的新型合成方法

首次分别在ＳｎＣｌ４－Ｐｂ（ＮＯ３）２－ＮａＯＨ－Ｈ２Ｏ和ＰｂＡｃ２－Ｎａ２ＳｎＯ３－ＮａＯＨ－Ｈ２Ｏ两个水热体系中一步合成了四方锡酸铅（Ｐｂ２ＳｎＯ４）晶体,条件温和,方法简单,易控,节能,ＸＲＤ和ＳＥＭ结果表明产物为单晶,相纯度高且形貌完美．     

固体酸Ｈ２ＳＯ４／ＳｉＯ２催化合成DOP

采用化学沉淀法制备了固体酸Ｈ２ＳＯ４／ＳｉＯ２，并将其应用于合成ＤＯＰ．考察了固体酸催化剂的制备条件及其对酯化反应的影响．实验结果表明，每克ＳｉＯ２用１０ｍＬ，浓度为０．５ｍｏｌ&;#183;Ｌ＾－１的硫酸浸泡０．５ｈ，３００℃下活化３ｈ，制得的固体酸Ｈ２ＳＯ４／ＳｉＯ２催化剂催化活性高，选择性好，酯化反应速率快，产率高。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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