新型铕β-二酮类化合物的合成及其发光性能的研究

利用乙酰吡咯、乙酰呋喃与三氟乙酸乙酯反应分别制取了两种新的β-二酮类化合物：吡咯甲酰三氟丙酮和呋喃甲酰三氟丙酮,利用红外光谱和质谱对其结构进行了表征。并与稀土金属铕配位制得了两种新的发红光的金属配合物,同时与经典的噻吩甲酰三氟丙酮铕（Eu（TTA）3）进行了荧光比较,探讨了不同配合物对荧光强度的影响。     

掺杂钇的铕稀土配合物的荧光绝对量子产率和寿命的研究（英文）

在无水乙醇中,利用Eu3+和Y3+作为中心离子,α-噻吩甲酰三氟丙酮(TTA)和1,10-邻菲啰啉(phen)作为配体制备了一系列共发光稀土配合物Eu_xY_(1-x)(TTA)3phen,并对TTA和Eu_xY_(1-x)(TTA)3phen进行了红外表征。掺杂钇的铕配合物与没掺杂钇相比,荧光绝对量子产率和平均寿命都发生了很大变化,随着钇含量的增大,Eu_xY_(1-x)(TTA)3phen的荧光绝对量子产率先增大,然后减小,而平均寿命则以波动方式逐渐减小,说明钇的掺杂改变了Eu_xY_(1-x)(TTA)3phen的分子微观结构,从而改变了Eu_xY_(1-x)(TTA)3phen的能量传递方式。     

新型铕β-二酮类化合物的合成及其发光性能的研究

利用乙酰吡咯、乙酰呋喃与三氟乙酸乙酯反应分别制取了两种新的β-二酮类化合物:吡咯甲酰三氟丙酮和呋喃甲酰三氟丙酮,利用红外光谱和质谱对其结构进行了表征。并与稀土金属铕配位制得了两种新的发红光的金属配合物,同时与经典的噻吩甲酰三氟丙酮铕(Eu(TTA)3)进行了荧光比较,探讨了不同配合物对荧光强度的影响。     

铕β-二酮类配合物的制备及其荧光性能分析

通过分步溶剂热反应法,以Eu~(3+)为中心离子,以2-噻吩甲酰基三氟丙酮(HTTA)、苯甲酰丙酮(BZA)、β-六氟乙酰丙酮(HFAC)、二苯甲酰基甲烷(DBM)及三苯基氧膦(TPPO)、1,10-邻菲罗啉(Phen)作为配体合成铕的配合物Eu(HTTA)_3(TPPO)_2,Eu(HTTA)_3Phen,Eu(BZA)_3(TPPO)_2,Eu(DBM)_3(TPPO)_2和Eu(HFAC)_3(TPPO)_2.采用电感耦合等离子光谱仪和元素分析仪确定其组成,经红外光谱、紫外光谱分析其结构,并在室温下研究其荧光性能.结果表明:所有配合物在紫外光照射激发下均发出Eu~(3+)的红色特征荧光,其中配合物Eu(HTTA)_3(TPPO)_2的荧光强度最强,荧光量子产率最高,第二配体TPPO对Eu~(3+)的荧光发射比Phen具有更佳的增强与协同效应;不同结构的β-二酮类配体和第二配体对配合物的荧光性能具有不同的影响,它们的荧光强度强弱顺序与其荧光量子产率高低顺序具有一致性,依次为:Eu(HTTA)_3(TPPO)_2,Eu(DBM)_3(TPPO)_2,Eu(HTTA)_3Phen,Eu(HFAC)_3(TPPO)_2,Eu(BZA)_3(TPPO)_2.研究结果为新型稀土有机配合物荧光材料的进一步开发提供了一定的理论基础.     

星型铕(Ⅲ)β-二酮配合物的合成及其有机光伏器件的表征

基于分子设计思想, 合成星型铕(Ⅲ)β-二酮配合物三（二苯甲酰甲基){1,3,5-三-［2-(2-吡啶)苯并咪唑］-甲基苯}-铕(Ⅲ)(Eu₃(DBM)₉(TMMB)). 采用真空蒸镀法, 以4,4′,4″-三( 3-甲基-苯基-苯胺基) 三苯胺(m-MTDATA)为电子给体, Eu3(DBM)9(TMMB)为电子受体制备有机光伏器件. 在紫外灯(365 nm, 1.6 mW/cm2 )从铟锡氧化膜(ITO)方向垂直照射下, 器件的开路电压、 短路电流密度、 填充因子和能量转换效率分别为1.70 V,38.9 μA/cm2,0.25和1.05%. 实验结果表明, 星型铕(Ⅲ)β-二酮配合物具有较好的光伏性能.     

甲基丙烯酸甲酯-铕配合物共聚红色发光材料的合成及荧光性能

合成了一种新的有机配体1-苯基-4-甲基-4-烯-1,3-戊二酮(MPPE)和相应的四元铕配合物,二(α-噻酚甲酰三氟丙酮)(1-苯基-4-甲基-4-烯-1,3-戊二酮)(1,10-邻菲咯啉)合铕(Ⅲ)(Eu(TTA)2(MPPE)(phen)),该配合物在紫外光的激发下发射出强烈的窄带红色荧光,最强发射峰位于612 nm.该四元配合物与甲基丙烯酸甲酯共聚得到聚甲基丙烯酸甲酯-铕(Ⅲ)配合物发光材料,在实验条件下,该聚合物发光材料的发光强度随着铕配合物含量的增加而增强,没有出现浓度猝灭现象.     

含稀土铕配合物的PVP薄膜的制备及发光性质

制备了含有稀土配合物Eu(TTA)3·3H2O和Eu(TTA)3phen·H2O的高分子基质材料聚乙烯吡咯烷酮(PVP)复合薄膜,通过元素分析、红外光谱、紫外光谱和荧光光谱的测试,确定了配合物的组成及结构,研究其荧光性质.实验结果表明:在制得的PVP薄膜中稀土铕的有机配合物含量较高,且具有非常优良的发光性能.     

共价有机多孔稀土杂化材料的制备与性能

以结构规整、密度低、热稳定性良好的共价有机多孔骨架（COF-SDU1）为基质,根据配位化学原理,将稀土β-二酮类铕配合物Eu（TTA）₃-Phen引入到该多孔基质中,得到稀土杂化材料（Eu（TTA）₃Phen-@COF-SDU1）。对合成材料的结构进行傅里叶变换红外光谱（FT-IR）,紫外-可见光谱（UV-Vis）和N₂吸附-脱附（BET）分析,结果表明,稀土杂化材料具有与COF-SDU1基质类似的IV型吸附-脱附特征曲线。热重分析表明,COF-SDU1作为良好的基质,能够显著改善稀土配合物的热稳定性。荧光性能分析表明,COF-SDU1基质不影响稀土与配体之间的能量传递。稀土杂化材料的荧光寿命相比于稀土配合物有明显提高。     

Eu(TTA)_2(phen)MAA /PVA纳米复合纤维的制备及发光性能

采用自制的铕配合物Eu(TTA)_2(phen)MAA,将其分散到聚乙烯醇PVA中,再通过静电纺丝技术制得一维复合纳米荧光纤维Eu(TTA)_2(phen)MAA/PVA.扫描电子显微镜(SEM)对纤维的微观形貌的表征结果表明,复合纤维的表面光滑,平均直径约为150 nm,红外和紫外光谱分析证实配合物Eu(TTA)_2(phen)MAA均匀分散在Eu(TTA)_2(phen)MAA/PVA复合纤维中。荧光光谱表明,不同配合物含量的纤维在365 nm波长激发下均表现出明亮的红光发射,当配合物Eu(TTA)_2(phen)MAA质量分数为8%时,纳米复合纤维的发光强度最大,为同比例掺杂型聚合物荧光粉发光强度的2倍。热重分析表明,Eu(TTA)_2(phen)MAA/PVA纳米纤维的初始分解温度为254℃,比配合物的初始分解温度高27℃,热稳定性能提高。Eu(TTA)_2(phen)MAA/PVA纳米复合纤维的荧光寿命为0.643 ms,高于配合物的荧光寿命(0.538 ms).     

α-甲基丙烯酰氧基二苯甲酰甲烷铕配合物-CO-甲基丙烯酸甲酯共聚物的合成及发光性能

首先合成了Eu(MADBM)(DBM)_2phen配合物单体,然后与甲基丙烯酸甲酯共聚,得到了含铕共聚物。用氢谱、红外光谱、紫外光谱和X射线光电子能谱对含铕共聚物进行了表征;通过凝胶渗透色谱(GPC)测得了共聚物的重均分子量为3.52×10~5,数均分子量为7.34×10~4,分子量分布系数为4.79;用331 nm紫外光激发,测得Eu~(3+)最强发射波长在615 nm,且是窄带发射,铕配合物的共聚物发出很强的红光,是由于聚合物碳链的存在,阻止了Eu~(3+)发光的浓度淬灭现象的发生;α-甲基丙烯酰氧基二苯甲酰甲烷铕配合物-CO-甲基丙烯酸甲酯共聚物是一种潜在的电致发光用的红光材料。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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