染料掺杂聚苯胺半导体薄膜的性能研究

采用电化学方法,制备了不同染料掺杂的聚苯胺薄膜,同时对染料掺杂后聚苯胺的结构和性能进行了表征,对其在紫外可见光区的吸收特性进行了研究.研究结果表明:染料掺杂后的聚合物薄膜电导率分别为:直接耐晒蓝掺杂为0.142S/cm;直接耐晒翠蓝掺杂为1.05S/cm;直接耐晒黑掺杂为0.796S/cm.直接耐晒蓝、直接耐晒翠蓝、直接耐晒黑掺杂均可使聚苯胺在可见光谱范围内的光吸收增强,可较大幅度地改善聚苯胺的光谱响应范围,同时又使得有机染料掺杂后的聚苯胺薄膜保持很高的电导率.另外,染料的种类对掺杂后聚苯胺的热稳定性有很大的影响     

C102和Rh6G在SiO2中的荧光光谱

为了提高染料激光器激光介质的波长范围和发光稳定性，在SiO2凝胶基质中掺杂混合染料：香豆素102和若丹明6G掺杂后的荧光光谱可调谐波长展宽．而且两种染料之间能量传递效率提高．     

溶胶—凝胶法制备酞菁染料掺杂ormosil研究

用溶胶－凝胶法制备了酞菁染料掺杂ｏｒｍｏｓｉｌ材料，研究发现，硅醇盐－水－乙醇－酞菁染料有机溶剂体系中，乙醇、水的加入量和有机溶剂的选择对制备出均匀掺杂的ｏｒｍｏｓｉｌ块体至为重要。加入较少量的水和适量的乙醇，彩和回流工艺加速水解过程，选用溶解酞菁能力强、沸点高的有机溶剂可以制备出均匀的ｏｒｍｏｓｉｌ块体，分散在ｏｒｍｏｓｉｌ中，酞菁染料显示出不同于其在液体中的光谱性质。     

掺杂浓度对四苯基卟啉掺杂电致发光器件的发光性能影响研究

以8-羟基喹啉铝(Alq3)为主体发光材料,四苯基卟啉(TPP)为掺杂染料,制备了5种不同摩尔掺杂浓度(0．5％、1．0％、1．5％、2．0％、2．5％)的掺杂电致发光器件,考察了掺杂浓度对其器件的电致发光光谱、色度、亮度和发光效率的影响;并结合掺杂器件的发光机理,对实验结果进行了分析和讨论     

稀土离子Gd3+掺杂TiO2光催化剂的制备及其对碱性品红降解性能的研究

采用溶胶-凝胶法制备了Gd3+掺杂TiO2光催化剂,利用紫外-可见漫反射光谱对样品进行了表征.考察了纯TiO2和 Gd3+掺杂TiO2对碱性品红染料降解性能的影响.结果发现Gd3+的掺入抑制了TiO2由锐钛矿相向金红石相的转变,与纯TiO2相比,Gd3+掺杂TiO2催化剂在可见光区的吸收能力增强,该催化剂光催化降解碱性品红的活性提高了20%左右.实验表明,掺杂Gd3+ 1%(质量分数),温度为25 ℃,底物浓度为20 mg·L-1时对碱性品红染料降解的效果较好.     

稀土离子Gd^3＋掺杂TiO2光催化剂的制备及其对碱性品红降解性能的研究

采用溶胶-凝胶法制备了Gd^3＋掺杂TiO2光催化剂,利用紫外-可见漫反射光谱对样品进行了表征.考察了纯TiO2和Gd^3＋掺杂TiO2对碱性品红染料降解性能的影响.结果发现Gd^3＋的掺入抑制了TiO2由锐钛矿相向金红石相的转变,与纯TiO2相比,Gd^3＋掺杂TiO2催化剂在可见光区的吸收能力增强,该催化剂光催化降解碱性品红的活性提高了20%左右.实验表明,掺杂Gd^3＋1%（质量分数）,温度为25℃,底物浓度为20 mg·L^-1时对碱性品红染料降解的效果较好.     

罗丹明B掺杂ZnQ2的电致发光器件及其性能研究

将8-羟基喹啉锌(ZnQ₂)和8-羟基喹啉铝(AlQ₃)的发光性能进行比较,筛选出ZnQ₂作为掺杂发光层主体材料,与荧光染料罗丹明B(RhB)共掺杂,采用真空热蒸镀法制备有机电致发光器件(OLEDs).掺杂不同浓度RhB可以获得不同波长的光发射,得到不同的发光色调.通过对溶液态荧光光谱和器件发光光谱等特性的测量与分析,探讨了器件的能量转移及发光机理.     

高效率的白光有机电致发光器件

为了提高白光有机电致发光器件的发光效率和光谱稳定性,采用染料掺杂的方法,制备了多层结构白光有机电致发光器件。通过参数优化实现了非常好的白光发射,并表现出良好的光谱稳定性。器件的开启电压为5.1V,发光亮度达到10800cd／m^2,最大电流效率和功率效率分别是10.4cd／A和3.5lm／W。     

铁酸钴掺杂的二氧化钛结构相变及光催化降解曙红的活性

分别采用溶胶-凝胶法和共沉淀法合成了二氧化钛和铁酸钴初始粉体,并将二粉体在一定的比例范围内进行复合,获得不同铁酸钴含量的二氧化钛基光催化剂.研究了铁酸钴掺杂对二氧化钛"锐钛矿→金红石"的结构相变及光催化降解曙红染料活性的影响.结果表明,铁酸钴的掺杂可抑制二氧化钛的相转变,而且可以拓宽二氧化钛的光谱响应范围至可见光区.在适量掺杂的情况下,铁酸钴掺杂的二氧化钛基光催化剂的光催化活性优于没有掺杂的样品,铁酸钴的最佳掺杂摩尔分数为0.5%.     

吡喃类激光染料的合成及光谱研究

在香豆素激光染料的基础上进行刚化环构,合成了10个吡喃类激光染料。运用自洽场分子轨道理论对染料吸收光谱和荧光光谱进行了理论上的研究,並通过对染料光谱计算值和实验测定值的比较,确定了它们之间的线性关系。     

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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