共查询到19条相似文献,搜索用时 62 毫秒
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二茂铁又叫双环戊二烯基铁,是由两个环戊二烯阴离子(C_2H_5~-)和一个二价铁离子(Fe~(2 ))构成的,具有芳香族性的有机过渡金属化合物。外观为橙黄色的针状结晶,具有类似樟脑的气味,熔点173~174℃,沸点249℃,100℃以上能升华;不溶于水,溶于甲醇、乙醇、乙醚、石油醚、二氯甲烷、苯等有机溶剂。其分子呈极性,具有高度热稳定性、化学稳定性和耐辐射性。溶于浓硫酸中,在沸腾的烧碱溶液和盐酸中不溶解,不分解;容易 相似文献
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二茂铁及其衍生物的合成与应用进展 总被引:1,自引:0,他引:1
近年来所取得的进步表明二茂铁及其衍生物在液晶等其他工业方面具有重要的应用前景。本文对二茂铁及其衍生物的制备、特点及应用研究现状作了归纳和评述。 相似文献
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二茂铁及其衍生物是重要的一类金属有机化合物.本文重点对它们在燃料添加剂、催化、电化学、医药学、液晶材料、光电功能材料等方面的应用和最新研究进展作了归纳和综合评述. 相似文献
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Fatma H. Abdel-Salam 《Journal of surfactants and detergents》2010,13(4):423-431
A novel series of anionic Schiff base amphiphiles were synthesized. The chemical structures of these compounds were elucidated
using different spectroscopic tools. The surface and thermodynamic properties of the prepared Schiff bases were studied using
classical measurements including surface and interfacial tensions. The surface parameters of these compounds, e.g., surface
tension, critical micelle concentration, effectiveness, efficiency, maximum surface excess, minimum surface area, and interfacial
activity showed their good surface activity. Their thermodynamic parameters of adsorption and micellization including free
energy change of micellization and adsorption showed their tendency toward adsorption at the interfaces and also micelle formation
at lower concentrations. The complexation behavior of the synthesized Schiff bases were study through the interaction of the
Schiff base (IIIa; SBSD) with nickel chloride hexahydrate. All synthesized compounds in addition to NiCl2·6H2O and Ni Schiff Base complex have been evaluated for their antibacterial activity against Gram-positive and Gram-negative
bacteria. The results of the biocidal activities showed high potent action of (Ni-IIIa; Ni-SBSD) complex more than Schiff base IIIa; SBSD. 相似文献
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大黄素甲基化衍生物的生物活性 总被引:2,自引:0,他引:2
在实验室内以天然存在的大黄素(emodin)为原料合成了甲基化衍生物大黄素甲醚(physcion)和三甲氧基大黄素(trimethoxyemodin),并进行了杀菌和杀虫活性研究,发现3个蒽醌类化合物对黄瓜白粉病(Sphaerotheca fuliginea)的活性有明显差异,其EC90值分别为56.291、3.382、102.699 mg/L,大黄素甲醚的活性远高于大黄素、三甲氧基大黄素和对照药剂三唑酮,说明大黄素母环上3-OH以甲基取代杀菌活性会显著提高,而3个羟基均被甲基取代活性会降低.在对甜菜夜蛾(Spodoptera exigua)幼虫的活性测定中,发现三甲氧基大黄素对甜菜夜蛾幼虫的生理活动具有明显的抑制作用,在4000 mg/L下对2龄和3龄幼虫的体重增长抑制率分别为99.6%和99.2%,而大黄素和大黄素甲醚则对其无明显影响. 相似文献
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Substituted amides of glycyrrhetic acid have been prepared. The substituents were chosen for their solubilizing effect and potential biological interest. 相似文献
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Several new pseudohalide derivatives of perfluoralkyl selenides have been prepared and characterized. Their properties are discussed in relation to the analogous alkyl and aryl selenides and perfluoralkyl sulphides. The trends in the properties of these compounds have been found to be in accordance with the expected influence of the strongly electron-withdrawing perfluoroalkyl groups. 相似文献