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近年来,利用LB技术制备电活性的有机超薄膜受到广泛的关注.导电LB膜的膜材料主要是含有受体化合物7,7’,8,8’-四氰基二亚甲基苯醌(TCNQ)的电荷转移复合物[1~3]以及给体分子[4,5],特别是四硫代富瓦烯(TTF)衍生物[6~8].尽管LB膜多由带长链的两亲性分子组装而成,但是对非两亲性TTF衍生物LB膜的研究[9~11]结果表明,引入长链烷基并非制备TTF类电荷转移复合物LB膜的先决条件.该结果极大地拓展了LB膜材料的研究范围.本文报道非两亲性TTF衍生物与花生酸混合导电LB膜的制备、结构表征与导电性能研究.1实验部分利用亚磷… 相似文献
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8-羟基喹啉两亲配合物的LB膜及其电致发光器件研究 总被引:6,自引:0,他引:6
制备了两亲配体N-十六烷基-8-羟基-2-喹啉甲酰胺(HL)十个配合物的LB膜。采用π-A等温线和小角X射线衍射等方法研究了这些LB膜的性质和结构。两亲配合物的单分子占有面积为(1.25±0.06)nm^2和(0.75±0.06)nm^2,分别对应于两亲分子中两个喹啉环平躺和环与环之间以一定的角度倾斜于气/水界面。LB膜内分子排列是二维有序的超晶格结构,双层高度(5.0±0.1)nm;LB膜具有导电各向异性,其平面和垂直直流电导率分别为10^-^5S.m^-^1和10^-^9S.m^-^1;LB膜的高荧光性质使之可以用作为电致发光器件的发光材料。以LaL~2(H~2O)~4Cl的LB膜为发光层的单层电致发光器件的驱动电压为9V,发光亮度330cd/m^2,为黄绿色发光。 相似文献
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四硫富瓦烯衍生物/硬脂酸LB膜的表征 总被引:2,自引:0,他引:2
研究了四(苄硫基)四硫富瓦烯/硬脂酸(TBT-TTF/SA)(1:1)LB膜、二(亚乙二硫基)四硫富瓦烯/硬脂酸(BEDT-TTF/SA)(1:1)LB膜和四(十六烷硫基)四硫富瓦烯/硬脂酸(THT-TTF/SA)(1:1)LB膜的结构.从X射线衍射结果得到了LB膜的层间距离.X射线衍射图显示了TBT-TTF/SALB膜和BEDT-TTF/SALB膜的层间结构由硬脂酸控制.从偏振红外结果计算出硬脂酸和四硫富瓦烯衍生物在LB膜中的取向角.根据分子取向角确定了LB膜的层间结构.用分子长度和分子取向角得到的层间距离与从X射线衍射得到的层间距离相吻合. 相似文献
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Changes to the fundamental and analytical parameters of a plasma have been investigated when ethanol has been added to aqueous or organic solutions. Excitation temperature, electron number density, and intensity of the H(alpha) line increased when ethanol has been added to aqueous solutions, while an electron density decrease and signal reduction have been found when ethanol has been added to xylene. The sensitivity has been improved for all ethanol concentrations when water has been the solvent, but the reverse has been found for xylene solutions. 相似文献
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12-Hydroxymethyltetrahydroabietic acid has been homopolymerized by melt condensation and homopolyester has been obtained. Vinyl 12-hydroxymethyltetrahydroabietate has been prepared from 12-hydroxymethyltetrahydroabietic acid by vinyl interchange procedure with vinyl acetate, and has been homopolymerized, copolymerized with vinyl chloride, vinyl acetate, and terpolymerized with styrene and acrylonitrile. The acrylate ester of 12-hydroxymethyltetrahydroabietic acid also has been prepared from 12-hydroxymethyltetrahydroabietic acid and acrylyl chloride. The acrylate thus obtained has been homopolymerized and copolymerized with vinyl chloride and vinyl acetate. Polymers thus obtained have been characterized. 相似文献
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《International journal of quantum chemistry》2018,118(12)
The problem of the stability of a confined atom when it is extracted from the confining cavity has been investigated, modeled by a spherical hard wall potential. The ionization probability when the atom is released from confinement has been obtained. The dependence of the ionization probability on the confinement radius and on the quantum numbers of the initial confined state has been studied. The probability density function of the ionization energy of the ejected electron has been obtained for the different cases considered. The oscillatory structure of this distribution function, with a principal maximum located in the neighborhood of the energy of the initial state and minima very close to zero has been elucidated. The sudden approximation has been applied and the analytic continuation method has been used to calculate the different stationary states. 相似文献
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由于外层镀有金属的塑料制品兼有塑料及金属材料的优点,因而是一类具有广泛用途的新型复合材料。其中以金属化的ABS塑料的应用最为广泛。**S塑料金属化的方法很多,其中以电镀法最受重视l‘]。为保证金属镀层与塑料表面具有良好结合力,使塑料表面形成四坑、微孔等均匀微观粗糙状态的粗化工艺是相当关键的步骤之一p‘。现国内外广泛采用铬一硫酸混合液的化学粗化法,但该法对环境污染较大。随着环保要求的日益高涨,其它粗化法越来越受到人们的重视[’]。本文探索了利用超声波的空化效应来粗化ABS塑料表面、为ABS塑料的电… 相似文献
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Changes to the fundamental and analytical parameters of a plasma have been investigated when ethanol has been added to aqueous or organic solutions. Excitation temperature, electron number density, and intensity of the H line increased when ethanol has been added to aqueous solutions, while an electron density decrease and signal reduction have been found when ethanol has been added to xylene. The sensitivity has been improved for all ethanol concentrations when water has been the solvent, but the reverse has been found for xylene solutions. 相似文献
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推导了络合返滴定曲线方程 ,绘制了络合返滴定曲线和计算了pN突跃。并利用双曲正弦函数的性质 ,提出了内含最大敏锐指数的络合返滴定误差计算公式 ,从而获得了计算络合返滴定pN突跃范围的公式。 相似文献
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M. Sudersanan 《Journal of Chemical Sciences》1979,88(5):385-391
Synergism in the extraction of scandium by a mixture of di-2-ethylhexyl phosphoric acid and a β-diketone has been studied.
The nature of the extracted species has been investigated. The effect of temperature on extraction has been studied and synergism
has been explained on the basis of thermodynamic parameters of the extraction process. 相似文献
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A nucleoprotein has been isolated from the gonads of the Caspian sturgeon and its composition has been determined. It has been shown that it contains 55% of DNA, 2% of RNA, 36% of protamines, and about 7% of nonprotamine proteins of nonbasic nature. The nucleoprotein has been hydrolyzed with trypsin, and the amino acid compositions of some hydrolysis products have been studied. On the basis of the results obtained, the hypothesis has been put forward of a possible linkage of the DNA with the basic proteins. It has been shown that protamines react with the DNA through the basic amino acid residues located at various regions of their molecules. 相似文献
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《Polymer Gels and Networks》1995,3(2):209-220
A simple nonlinear theory of viscoelasticity has been developed for application to elastomers. The interpretation of nonlinear viscoelastic responses based on Gibbs-DiMarzio theory has been identified at a molecular level and hence structural understanding has been established. The introduced model is applied to strain imposed conditions. From this, a relaxation process has been revealed for the resultant stress, where a dependence of relaxation time on the state of strain has been established. 相似文献
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《Electroanalysis》2005,17(3):205-209
The reaction of benzoquinone with reduced thiol species has been investigated using potentiometric techniques. The specificity of this reaction for thiol functionality has been briefly assessed and the nature of the electrode response has been elucidated. The system has been characterized in terms of selectivity, sensitivity and the efficacy of using the system for the quantification of thiol containing pharmaceuticals has been demonstrated. The simplicity of the detection methodology is shown to markedly contrast alternative thiol detection strategies. The transfer of the technology to a mass production format through the adoption of screen print electrode formats has been achieved and the efficacy of the approach demonstrated. Recovery experiments using captopril and penicillamine in tissue culture as a model analyte system were performed. 相似文献