二茂铁有机磁性材料的应用

与无机铁氧体比较,以二茂铁为原料,按专利献合成的二茂铁有机磁体在广泛的温度范围内磁性能十分稳定,在10—1800MHz的高频、微波下,磁导率(μ′)和磁损耗(μ″)基本不随使用频率而变化,应用研究表明,它是一类新型的软磁材料,适于制作许多高频和微波电子器件。     

丙烯酸改性二茂铁型高分子磁体的电磁性能研究

用丙烯酸对二茂铁型高分子磁体 (以下简称高分子磁体 )进行改性 ,研究了高频微波下改性高分子磁体的频率—磁导率—磁损耗 (f μ′ μ″)及频率—介电常数—介电损耗 (f ε′ ε″)的关系 .研究结果表明 :丙烯酸改性的高分子磁体具有较高的介电常数 (ε′)、较低的介电损耗 (ε″)和磁损耗 (μ″) ,这对电子器件的小型化有重要价值 .     

响应曲面法优化二茂铁基双甲酰肼的微波辅助合成工艺

本研究采用微波辐射技术简便、快速、高效合成1,1′-二茂铁双甲酰肼(d)。为了提高其产率,分别以1,1′-二茂铁双甲酸甲酯和80%水合肼的物料比,微波输出功率和微波辐射加热时间为单因素进行考察,利用响应曲面法进行合成工艺的优化。研究结果表明:1,1′-二茂铁双甲酸甲酯和80%水合肼的物料比为2∶5,微波输出功率为100 W,微波辐射加热反应时间为15 min为其最佳合成工艺条件,产率可达91.7%。     

两个新的二茂铁基席夫碱衍生物的合成、表征及电化学性质

以二茂铁间(对)苯胺为原料，合成了两个新的二茂铁基席夫碱衍生物FcL1[N-(2-羟基亚苄基)-3-二茂铁基苯胺]和FcL2[N-(2-羟基亚苄基)-4-二茂铁基苯胺]，通过元素分析，IR，UV和^1HNMR光谱分析等确证了标题化合物的结构．电化学研究表明：FcL1和FcL2的电化学性质相似，亚胺基团的引入显著影响了二茂铁的式量电位，同时，茂环上取代基的氧化会导致电极的钝化．此外，利用多种电化学手段测定了标题化合物在CH3CN中的扩散系数(D)和标准电极反应速率常数(ks)．     

酞菁-二茂铁型高分子吸波材料的合成与表征

以聚1,1'-二乙烯基二茂铁为原料,通过Friedel-Crafts反应引入酞菁铁,用元素分析、IR、TGA及其μ′、μ″、ε′、ε″电磁参数对这种新型吸波材料进行表征,并初步分析了该聚合物的结构与微波吸收性能,为合成新一代轻质及红外兼容的高分子微波吸收材料提供理论依据.     

簇合物Co6(μ3-S)2(μ4,η2-SPR)(CO)14(R=Fc,naphthyl

用P2S5分别与萘和二茂铁反应，得到两种配位基前体：(L1，C10H7为naphthyl萘基)和(L2，Fc为二茂铁基).L1和L2分别与Co2(CO)8反应，得到两种新的含S、P桥基的六核钴羰基簇合衍生物：Co6(μ3-S)2(μ4,η2-SPC10H7)(CO)14(Ⅰ)和Co6(μ3-S)2(μ4,η2-SPFc)(CO)14(Ⅱ).L1与Ru3(CO)12反应得到Ru3(μ3-S)(μ-H)2(CO)9(Ⅲ)和Ru4(μ3-S)(μ3-PC10H7)(CO)10(Ⅳ).通过元素分析和谱学表征，对簇合物Ⅰ～Ⅳ的结构进行了推测.     

微波与FIA联用对药物中维生素C的快速测定

首次利用实验室自制的微波流动注射分析仪，基于微波场对Ｖｃ与钼酸钠反应的加速作用，建立了测定了Ｖｃ的微波流动注射分析新方法，其线性范围，检测限和分析速度分别为５．００－８０．００μｇ／ｍｌ，２．００μｇ／ｍｌ和４０次／ｈ 。该方法已用于Ｖｃ针剂中Ｖｃ的定量测定，回收率在９３．６％－１０４．４％之间。     

微波辐射下合成二茂铁基查尔酮

报道了在微波辐射条件下,以乙醇为溶剂,固体氢氧化钠为催化剂,使芳醛与乙酰基二茂铁反应合成二茂铁基查尔酮.该法具有反应时间短、产率较高和操作简便等特点.     

二茂铁衍生物电催化氧化NADH及催化速率常数的测定

用微盘电极研究了二茂铁衍生物的电化学行为及电催化氧化二氢烟酰胺腺嘌吟二核苷酸（ＮＡＤＨ）。用微电极测定了二茂铁衍生物（磺酸基二茂铁，乙酰基二茂铁，羧酸基二茂铁，α－羟乙基二茂铁，α，α＇－二经乙基二茂铁）的扩散系数（分别为３．４×１０￣（－６），６．９×１０￣（－６），１．７×１０￣（－６）．６．２×１０￣（－７），１．５×１０￣（－６）ｃｍ￣２／ｓ）及乙酞基二茂铁电催化氧化ＮＡＤＨ的催化速率常数（４．６８×１０￣３（ｍｏｌ／Ｌ）￣（－１））。探讨了温度、ｐＨ及β－环糊精的络合效应对催化反应的影响。     

两种可溶性二甲酰二茂铁酰胺缩聚物的合成与表征

以1，1’-二甲酰氯二茂铁和芳二胺为原料合成两种未见报道的可溶性二甲酰二茂铁酰胺缩聚物，并用元素分析、IR、^1 HNMR、TG-DT、GPC及XPS对其化学与物理性能进行表征．研究表明，在ZnCa2催化下，缩聚物的M^-a，矾高达十万以上，较无催化剂下的缩聚物的分子量约大1．5倍．另外，XPS能谱表明，两种缩聚物中的二茂铁基团相当稳定．     

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     

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