DCC／DMAP法合成二茂铁基苯甲酸胆甾醇酯

倒重氮法合成两类二茂铁基苯甲酸，继而研究以N，N-二环己基碳二亚胺（DCC）作脱水剂，用4-二甲胺基吡啶（DMAP）作除水促进剂，胆甾醇与间、对-二茂铁苯甲酸反应合成液晶材料间、对-二茂铁基苯甲酸胆甾醇酯的方法。研究结果表明，该方法反应条件比较温和，用DMAP作除水促进剂时，胆甾醇酯产率比较高。高效酰化催化剂法是十分有效的酰化方法，在合成胆甾醇酯液晶中可较大幅度地提高产品的产率与纯度，简化操作，降低反应毒性。     

盘状液晶的性能及应用

简要介绍了盘状液晶的基本概念、分子结构和相态,综述了盘状液晶的分子结构对相的影响、自组装性能、电导性能、光学性能、磁学和铁电性能方面的最新研究进展.盘状液晶柱状相拥有高的有序性和电荷传输速率,作为新型有机半导体材料具有广阔的应用前景.最后,系统概述了盘状液晶材料的应用,并指出了盘状液晶在应用方面存在的问题以及解决问题的方法和建议.     

液晶高分子研究进展

简要介绍了液晶高分子的研究进展,主要包括液晶高分子的合成、影响高分子液晶相的因素、液晶高分子的特性及其应用等方面.     

含二茂铁功能材料的最新研究进展

含二茂铁基功能材料的研究是近年来金属有机化学研究的热点.本文综述了二茂铁及其衍生物的合成研究热点、新点,并概括了二茂铁及其衍生物在材料领域的应用.提出了该领域未来研究的发展方向.     

酯类液晶化合物的研究新进展

酯类液晶是近年来广泛应用于高端电子产品的液晶材料.简要评述了酯类液晶的合成进展,并详细讨论了近几年国内外酯类液晶的合成方法及性能,并对其应用前景进行了展望.     

含侧甲基液晶双马来酰亚胺的合成及表征

通过甲基对苯二酚和对马来酰亚胺基苯甲酸,制得了一种低熔点的酯类液晶双马来酰亚胺.应用FT-IR、1H-NMR、DSC、HSPM对液晶双马来酰亚胺的结构和液晶行为进行了表征.结果表明,这类液晶双马来酰亚胺具有较低的熔点,侧甲基的存在使得液晶双马来酰亚胺的熔点下降了39℃.由HSPM观察到所合成的液晶单体具有向列型液晶所具有的典型的纹影织构,呈现出较好的热致液晶行为,并且液晶织构可以通过端基的交联聚合反应固定在交联网络中.     

无机液晶的研究进展

无机液晶稀少且具有特殊的光、电、磁等性质.综述了过去和近年来无机液晶的研究进展,全面总结了无机液晶的3种最基本中间相--向列相、层状相和柱状相的研究成果,探讨了无机液晶的应用,同时指出了无机液晶研究和发展的几个方向.     

稳定蓝相液晶的研究进展

介绍了蓝相液晶特殊的“双轴螺旋”结构,并解释了其三维晶格的形成.阐述了蓝相液晶在显示器件中的应用优势和原理.分类详细介绍了诸如聚合物稳定、纳米粒子稳定、“香蕉”型或“T”型分子诱发稳定、双液晶基元以及氢键稳定等拓宽蓝相温度范围的方法,分析了各自的特点和优势.最后对蓝相液晶的应用前景进行了展望.     

液晶材料的分类、发展和国内应用情况

介绍了液晶材料的种类,及国内主要液晶材料的分类性能,论述了实际应用和市场前景.     

含二茂铁基的有机导电材料研究进展

二茂铁具有芳香性、热稳定性、氧化还原性、、导电性、磁性、结构可变性和良好的溶解性等特性，使得它更易与其它有机官能团进行化学组合，从而制备出具有电磁性能的金属有机功能材料，广泛应用于微生物传感器、有机光电开关器件、液晶材料、有机磁性材料和吸波材料等方面。详细介绍了聚二茂铁基烯烃、聚二茂铁基硅烷、聚二茂铁基偶氮、聚二茂铁基噻吩、二茂铁基TCNQ、聚二茂铁基吡咯、聚二茂铁基苯胺等导电材料的研究状况，列出这些聚合物的基本结构，分析了其导电机理，提出了含二茂铁基的有机导电材料今后的主要研究方向。     

具有多种性能的二茂铁衍生物

本文对二茂铁衍生物的光谱特性及其多种和非线性光学性能。电化学性能,生理活性进行了综述,探讨了结构与性能之间的相互关系。     

Preparation of ferrocene nanocrystals by the ultrasonic-solvent-substitution method and their electrochemical properties

Ferrocene nanocrystals are successfully prepared by the ultrasonic-solvent-substitution method. Transmission electron microscopy images show that the average diameter of the nanocrystals is about (40+/-5) nm and X-ray diffraction analysis indicated that the products obtained have a high purity. The optical properties of the products are studied by IR and UV/Vis spectroscopy. UV/Vis spectra indicate that, compared with ferrocene bulk material, the nanospheres show an obvious blue shift. Cyclic voltammetry is used to test the electrocatalytic oxidation properties of the ferrocene nanospheres towards ascorbic acid on the glassy carbon electrode. The results show that the ferrocene-nanosphere-modified glassy carbon electrode exhibits a better electrocatalytic effect than that modified by the ferrocene bulk material in phosphate buffer (pH 5.00). The important factors in the preparation of and a possible mechanism for the formation of ferrocene nanospheres is also discussed. The method could potentially be applied to the preparation of nanomaterials of other organometallic compounds.     

纳米Fe/C复合材料的原位合成

在石油渣油中加入二茂铁，通过热缩聚反的位合成纳米级铁粒子均匀分散于炭基体中的新型复合材料，研究了在420℃热缩聚时停时间和二茂铁添加量对Fe/C形成的影响，并用TEM和XRD观测和分析了Fe/C的形态和结构，结果表明，在基体中铁粒子的粒径为25－50nm，在一定条件下，二茂铁添加量的增加和停留时间的延长均使Fe/C产率提高，停留时间对热缩聚反应的影响遵循一级反应动力学，二茂铁的添加能显著提高反应速率常数k值。     

气相爆轰合成碳包铁的影响因素

研究了氢氧摩尔比例与二茂铁质量对制备碳包覆铁纳米颗粒的影响。通过氢气与氧气爆轰产生的高温高速, 在自制爆轰管内分解二茂铁, 合成了碳包覆铁纳米颗粒。经XRD分析与TEM表征发现, 氢氧比例与二茂铁质量在制备碳包铁时相互影响, 氢氧比例主要影响碳包铁的形貌大小及分散性, 二茂铁质量对能否合成碳包铁纳米颗粒影响很大。当氢氧比例为2:1, 二茂铁质量在2.5~3.5 g时, 能够合成碳包覆铁纳米颗粒, 且呈球形或椭球形, 具有明显的核壳结构。从颗粒大小均匀性, 形貌结构及分散性考虑, 氢氧比例2:1, 二茂铁质量3.5 g的反应条件是制备碳包铁的较佳方案。     

Langmuir-Blodgett films of long-chain derivatives of ferrocene, biferrocene and oxidized ferricenium

Different orientations of ferrocene nuclei can be obtained in the Langmuir- Blodgett (LB) films of amphiphilic ferrocene and biferrocene derivatives, depending on the number of long-chain substituents. Polarization energies of ferrocene due to the molecular alignments in the LB films were estimated from UV photoelectron spectroscopy with reference to the cyclic voltammograms for the solutions. Change transfer complexes of the ferrocene derivatives with various electron accepting species such as iodine and tetracyanoquinodimethane give stable condensed monolayers and the electronic absorption spectra of these complexes were examined in the monolayers and multilayers. The BF^-₄ salts of the ferrocene and biferrocene derivatives also form stable monolayers in which the absorption band due to the oxidized ferricenium cation was observed at 610–690 nm. In addition, electrochemical oxidation and reduction for the LB films of the ferrocene derivative have been studied.     

环己烷浮游催化法在碳纤维表面生长碳纳米管

以环己烷为碳源、二茂铁为催化剂前躯,采用浮游催化法成功的在碳纤维表面生长了碳纳米管(CNT),制备了多尺度杂化材料CNTs/CF。实验重点考察了反应温度、二茂铁浓度、载气等参数对CNT在纤维表面生长的影响,通过扫描电镜(SEM)、投射电镜(TEM)研究了CNTs/CF的形貌及产物CNT的微观结构。当固定反应温度为820℃、二茂铁-环己烷浓度为2g/100mL时,随着氢气在载气中含量在0～100%范围内变化,产物CNT直径亦有86nm降低至39nm。通过单丝拉伸测试发现,相比初始碳纤维,不同长度的CNTs/CF单纤维强度下降幅度均在10%以内。     

二茂铁与氯化铵用量对气压法制备炭空心球直径的影响(英文)

研究了二茂铁和氯化铵的用量对气压法制备炭空心球直径的影响.炭空心球的形貌与直径通过场发射扫描电镜表征.实验发现:炭空心球的直径主要分布在1 μm ～10 μm,形貌基本一致.在二茂铁与氯化铵质量比一定时,炭空心球的直径随着原料总量增加而增大.当氯化铵过量时,炭空心球的直径存在双峰分布,但中位径基本不变.在合成过程中,铁颗粒与液态Fe(NH3)2Cl2模板的团聚,以及铁铵络合物之间的相互转化是影响炭空心球直径的主要因素.     

A novel method for preparation of hollow and solid carbon spheres

Hollow and solid carbon spheres were prepared by the reaction of ferrocene and ammonium carbonate in a sealed quartz tube at 500°C. The morphology and microstructure of the product were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy. The carbon spheres are amorphous and their diameters range from 0·8–2·8 μm. The shell thickness of the hollow carbon spheres is not uniform and ranges from 100–180 nm. It is suggested that ammonium carbonate is crucial for the formation of carbon spheres and its amount also influences the morphology of the product. The method may be suitable for large scale preparation of carbon spheres.     

Effects of mechanical pressure on charge transport in some ferrocene derivatives in the presence of adsorbed vapours

The change in adsorption-induced electrical conductivity of some ferrocene derivatives as a function of temperature has been studied under moderate pressures. At a constant cell temperature, the conductivity of the pure ferrocene derivatives in the dry state depends on the applied pressure and this pressure dependence of conductivity is significantly different for different materials. A spectacular change in the electrical conductivity behaviour of these materials at the vapour-adsorbed state, as a function of temperature under mechanical pressure, has been observed. Pressure-induced change in conductivity of different ferrocene derivatives at the vapour-adsorbed state is remarkably different. The results have been discussed in the light of different existing theories. The unusual variation of conductivity with temperature under pressure is thought to be due to the phase transition in these materials.