微乳液法合成单分散Co_2O_3超微粒子及其表征

采用微乳液法合成了表面包覆有一层十二烷基苯磺酸(DBS)分子的Co_2O_3超微粒溶胶,研究了表面活性剂(DBS),氧化剂及酸度对合成的影响,利用小角X射线散射和透射电镜测得其粒径分布为3～7 nm,并采用自制的简并四波混频装置,测定了其有机溶胶的三阶光学非线性极化率(x~((3))),得到x~((3))≈1.4×10~(-17)m~2/V~2和CdS_(1-x)Se_x掺杂玻璃相近。     

Zn2SiO4：Mn的水热法制备

利用简易水热法原位合成制备Zn2SiO4:Mn绿色荧光体,主要原料为TEOS(Tetraethyl orthosilicate),Zn(CH3COO)2·2H2O,Mn(CH3COO)2·4H2O.通过控制反应条件,合成出了具有空心和微米花状结构的硅酸锌掺锰,利用XRD,TEM,SEM和荧光光谱仪对其进行表征,并对其反应机理进行解释.     

Ca/P比对合成骨灰瓷原料的晶相和显微结构的影响

以氧化钙和磷酸为起始原料合成骨灰瓷原料.采用XRD和SEM方法表征了合成料的晶相与显微结构,探讨了不同Ca/P的比值对结构的影响.结果表明:合成料存在α-Ca3(PO4)2、β-Ca3(PO4)2、Ca10(PO4)6(OH)2和CaO四个晶相.Ca/P比值从1.0→1.6,β-Ca3(PO4)2含量增加,α-Ca3(PO4)2含量降低;Ca/P比值从1.6→2.0,β-Ca3(PO4)2含量降低,而α-Ca3(PO4)2含量增加;Ca/P=1.6时,β-Ca3(P4)2含量最高,因此选择其为最佳的配方.对应的晶相含量(质量分数)分别为:β-Ca3(PO4)2为76.0%,α-Ca3(PO4)2为6.6%,Ca10(PO4)6(OH)2为9.2%,CaO为7.7%.     

新型星形聚膦腈基杂臂聚合物的合成

以六氯环三膦、对羟基苯甲醛为原料合成了N3P3(OC6H4-p-CHO)6;经硼氢化钾还原合成了N3P3(OC6H4-p-CH2OH)6;加入一定量的2-溴-2-甲基丙酰溴,部分取代醇羟基,合成N3P3(OC6H4-p-CH2OH)3(OC6H4-p-CH2OCOC(CH3)2Br)3;合成的产物与己内酯(CL)进行开环聚合(ROP),制备含3条聚己内酯(PCL)臂的星型聚合物[N3P3(OC6H4-p-CH2OCOC(CH3)2Br)3(OC6H4-p-CH2O(PCL))3];3臂星型聚合物引发苯乙烯的原子转移自由基聚合(ATRP),合成含3条聚己内酯臂和3条聚苯乙烯(PSt)臂的新型杂臂聚合物[Star-(PCL)3-(PSt)3].通过红外光谱表明,聚合物已成功合成.     

EDTA凝胶法合成LaAlO3研究

利用乙二胺四乙酸(EDTA)凝胶法合成了LaAlO3．利用差热分析(DTA)、热重分析(TG)、傅里叶变换红外光谱(FT-IR)和X射线衍射(XRD)等技术对前驱体及得到的粉末进行了分析．其结果是：在LaAlO3合成过程中,溶液的pH值直接影响凝胶的形成,本实验中控制溶液的pH值在0．5左右;在800℃条件下,2h合成了结晶良好的、单相的LaAlO3,并且LaAlo3不是通过La2O3与Al2O3经过固相反应形成的,而是直接从无定形前驱体结晶形成的,没有中间相生成．     

两种LnLx(phen)2(Ln=Nd,Sm)配合物的合成、晶体结构和光谱

采用水热合成和恒温加热合成方法,得到了两种Ln3 的配合物[Nd(oxinate)(phen)2(NO3)2]·(CH3OH)1/2(1)和Sm(phen)2(CH3COO)3(2).对这两种化合物的单晶进行了X-射线衍射分析,确定了它们的结构.并对这两种化合物的UV-VIS-NIR,IR和荧光光谱进行了测定和分析.     

二(甲基环戊二烯基)二氯化钛及某些取代苯氧基衍生物的合成及其核磁共振谱

本文首先对二(甲基环戊二烯基)二氯化钛的合成方法作了评选。并提出了一种新的产率较高的合成方法,然后以它和某些取代苯酚反应合成了化合物(MeCP)_2Ti(OC_6H_4CH_3-2)_2、(MeCP)_2Ti(OC_6H_4CH_3-3)_2、(MeCP)_2Ti(OC_6H_4CH_3-4)_2,其次,研究了它们的红外光谱和核磁共振谱。     

多水硼镁石快速合成方法

采用固-液-固转化法,研究了在40℃恒温、磁力搅拌条件下快速合成多水硼镁石(2MgO·3B2O3·15H2O)的方法。运用化学分析、X-ray粉晶衍射、傅里叶变换红外光谱和同步热分析(TG-DSC)对合成的多水硼镁石产品进行了表征。结果表明该合成方法具有合成时间短、工艺操作简单、产品纯度高等优点。合成的高纯多水硼镁石产品可应用于其相关的物化性质研究。此外,在合成实验的基础上,结合反应过程中溶液pH的变化,对其结晶机理进行了初步探讨。     

(H_3O)_2[Co(C_2N_2H_8)_3]_2[W_7O_(24)]结构和振动光谱的实验和理论研究

采用水热法合成了新化合物(H3O)2[Co(C2N2H8)3]2[W7O24],对其结构进行了红外光谱和X射线单晶衍射测定。通过密度泛函理论,对其红外光谱进行了计算,对吸收峰的振动模式进行了指认。结果显示,(H3O)2[Co(C2N2H8)3]2[W7O24]的红外光谱对溶剂十分敏感。     

融盐包裹法合成球形正极材料LiNi_(0.7)Co_(0.2)Al_(0.1)O_2(英文)

以球形Ni(OH)2为核心原料,Al(NO3)3.9H2O、Co(NO3)2.6H2O和LiNO3为包裹原料,采用融盐包裹法在空气中煅烧合成了单相固溶体LiNi0.7Co0.2Al0.1O2。用XRD研究了合成产物的物相和结构,用SEM研究了合成产物的形貌,用电池性能测试仪研究了合成产物的电化学性能。实验结果表明,合成产物具有α-NaFeO2型层状有序结构、球状形貌和良好的电化学性能。     

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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