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微球形4-氨基吡啶分子模板聚合物的合成及结合性质研究 总被引:15,自引:0,他引:15
利用分子印迹技术,通过沉淀聚合方法合成了对4-氨基吡啶具有选择性结合能力的微球形分子模板聚合物。通过静态结合方法研究了该聚合物的选择性结构能力以及不同溶剂及引发剂的用量对聚合物形态及球状 状聚合物粒烃大小的影响,底物选择性实验结果表明,与结构相似的化合物相比,4-氨基吡啶球形分子模板聚合物对4-氨基吡啶显示出强的选择性。 相似文献
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以桑色素为模板的分子烙印聚合物的制备、结合特性及其在薄层色谱固定相方面的应用 总被引:1,自引:0,他引:1
以桑色素为模板,选用不同的功能单体和致孔剂制备了一系列分子烙印聚合物,采用结合实验考察了它们对底物的吸附特性,发现以丙烯酰胺为功能单体,以乙酸乙酯为致孔剂制得的烙印聚合物对底物有很好的选择性,同时对一些结构相似的化合物具有一定的结合力.Scatchard方程研究结果表明,在研究的浓度范围内聚合物形成了一类等价的结合位点,其平衡离解常数为0.877mmol/L,对模板分子的最大表观结合量为59.18μmol/g.可认为桑色素分子中3,7,4'位的羟基与功能单体的氢键作用是分子烙印聚合物具有底物选择性的主要因素.以该分子烙印聚合物为薄层色谱固定相,可以把模板分子从结构相似的化合物中分离出来,最小分离度为1.19. 相似文献
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水溶液中制备分子印迹聚合物微球及其分子识别特性 研究 总被引:19,自引:0,他引:19
采用聚乙烯醇400作为分散剂,利用模板分子与功能单体/聚合物残基之间的离子键(静电)相互作用形成复合物,用水溶液微悬浮聚合法制备了4-氨基吡啶(4-AP)和甲氧苄氨嘧啶(TMP)分子印迹聚合物微球,并通过色谱行为表征,比较了它们对各自的模板分子作用的强弱。结果表明,采用甲基丙烯酸为功能单体制备的分子印迹聚合物微球(MIMs),对带有氨基的模板分子主要靠离子键(静电)相互作用,且作用力的大小与氨基的个数有关,色谱研究表明,模板分子中氨基数目越多,这种作用越强,而且这种作用不是简单的加合,而是协同增强作用。 相似文献
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药物扑热息痛分子模板聚合物的选择性富集与识别特性研究 总被引:25,自引:0,他引:25
采用分子印迹技术合成了对药物扑热息痛有高选择性的模板聚合物。通过Scatchard分析研究了模板聚合物的结合特性;研究了模板聚合物的结合动力学。结果表明,以丙烯酰胺为功能单体的模板聚合物比以甲基丙烯酸为功能单体的聚合物具有更高的结合容量。 相似文献
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Mustafa R. Ibrahim Zacharia A. Fataftah Paul von Ragu Schleyer Peter D. Stout 《Journal of computational chemistry》1987,8(8):1131-1138
Sets of hydrogen molecule equivalents have been developed which permit the calculation of hydrogenation of different types of carbon-carbon bonds from ab initio total energies (3-21G and 6-31G* basis sets, and, to a more limited extent, for MP2/6-31G* data) of reactants and products. The calculated enthalpies of hydrogenation are in good agreement with experiment for unstrained molecules, with average errors on the order of 2 kcal/mol. The 6-31G* equivalents allow the enthalpies for strained molecules to be calculated accurately, but the 3-21G equivalents do not. The equivalents for both basis sets have been tested by calculating the enthalpies of hydrogenation of carbon-carbon bonds in nitrogen- and oxygen-containing organic molecules, free radicals, and classical carbocations. The results are in good agreement with experiment in most cases. 相似文献
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利用手持技术改进测定乙醇分子结构实验 总被引:1,自引:0,他引:1
利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。 相似文献
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V. I. Bol'shakova L. I. Demenkova É. N. Shmidt V. A. Pentegova 《Chemistry of Natural Compounds》1988,24(6):691-694
The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae. 相似文献
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V. I. Bol'shakova L. I. Demenkova É. N. Shmidt V. A. Pentegova 《Chemistry of Natural Compounds》1989,24(6):691-694
The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988. 相似文献
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由于石化行业的生产需要,其材质的使用具有多样性和广泛性,经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识,根据光谱仪的测试能力及标样的采集,实现了一个或几个元素测量范围的扩展,并对其测量的影响因素进行了研究。 相似文献
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