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4′-氨基苯并-18-冠-6分别与间-硝基苯甲醛、对-硝基苯甲醛、间-苯二甲醛及其取代物和对-苯二甲醛缩合制得6种新的Schiff碱型单冠醚和双冠醚。4′-甲酰基苯并-18-冠-6分别与4′-氨基苯并-15-冠-5、4′-氨基苯并-18-冠-6作用制得2个醚环大小相同和不同的Schiff碱型双(苯并冠醚)。这些双冠醚经硼氢化钠还原得到相应的6种新的仲按型双冠醚。 相似文献
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聚醚醚酮(PEEK)具有突出的耐高温水解和耐辐照性能以及良好的断裂韧性,现已在核能、宇航等高技术领域得到应用。研制新型聚芳醚酮是目前十分活跃的课题。本文采用亲核取代路线,以对苯二酚、联苯二酚、4,4′-二氟二苯酮为单体合成了一系列含亚联苯结构的新型聚芳醚酮,并对基基本性能进行了测定。 相似文献
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网状聚合物冠醚的合成与性能(Ⅱ)——通过乙二醇双环氧丙基醚与单环氧丙基醚的共聚合成 总被引:1,自引:0,他引:1
通过非冠醚单体直接合成聚合物冠醚,是一条值得注意的新途径。Mathias等通过α,ω-三缩四乙二醇双乙烯醚的环化聚合,Yokota等通过1,2-[2-(2,3-环氧丙氧基)乙氧基]苯的环化聚合分别合成了相应的线型聚合物冠醚。我们分别通过双环氧丙基醚、乙二醇双环氧丙基醚及多缩乙二醇双环氧丙基醚的交联聚合,合成了八种新型网状聚合物冠醚。为了与Yokota等采用的环化聚合途径相区别,我们称这种聚合途径为网化聚合,并根据所得聚合物的结构特征将它们称为网状聚合物冠醚。 相似文献
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双冠醚与较大的金属离子能形成夹心型络合物,与相应的单冠醚相比较,它们具有更好的络合性和选择性。但双冠醚一般不溶于水中。本文用EDTA二酐与4'-氨基苯并-12-冠-4及4'-氨基苯并-15-冠-5反应,制得了两种在桥键上带有两个羧基的酰胺型双冠醚Ⅰ和Ⅱ。Ⅰ、Ⅱ未见报导,均能溶于水,这就可以象其它水溶性单冠醚一样,在水溶液中研究它们的络合行为。 相似文献
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网状聚合物冠醚的合成与性能—Ⅰ.以双环氧丙基醚、乙二醇双环氧丙基醚及多缩乙二醇双环氧丙基醚为原料合成 总被引:7,自引:2,他引:5
本文报道了一类新型网状聚合物冠醚的合成方法及其性能。分别通过双环氧丙基醚、乙二醇双环氧丙基醚及多缩乙二醇双环氧丙基醚等五种双环氧单体的网化聚合,直接合成了八种网状聚合物冠醚。聚合反应中分别采用了两种催化体系:BF3·OEt2和(i-Bu)3Al。测定了网状聚合物冠醚对金属阳离子的络合容量及其在亲核取代反应中的相转移催化活性。实验表明,这类网状聚合物冠醚合成简便、性能良好且便于重复使用。 相似文献
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聚芳醚酮是一种新型热塑性耐高温高分子材料,具有优异的力学性能、电性能、抗辐射性能等,特别适合作高性能复合材料的基质及超级工程塑料,关于聚芳醚酮已有多篇文章报道,而基于C-N偶合反应合成的聚芳醚酮报道甚少[1],我们曾报道含氮杂环聚醚酮酮PPEKK的合成[2].本文以1,4-二(4-氯代苯甲酰基)苯,4,4′-二氟二苯酮及4-(4-羟基苯基)-2,3-二氮杂 萘-1-酮为原料,合成了主链中含有C—N键的新型含氮杂环聚芳醚酮三元共聚物 (PPEKEKK),对共聚物的结构和性能进行了表征. 相似文献
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冠醚的分子设计(XX)——含硫、硒杂环的苯并-15-冠-5的合成及其对阳离子的选择性 总被引:1,自引:0,他引:1
冠醚可以选择性配位金属离子 ,形成主 -客体或超分子配合物 .因此 ,冠醚的分子设计、合成 ,尤其是对金属离子的配位能力一直是化学研究领域的热点之一 [1] .为了得到高选择性的功能体系 ,控制主 -客体的配位作用 ,人们开展了广泛的冠醚合成及其配位作用的研究[2~ 4 ] .然而 ,含杂环的苯并冠醚研究较少[5~ 9] .我们曾报道了一系列冠醚对金属离子的配位能力和配位选择性 ,给出了有意义的结果[10 ,11] .本文报道两种新型苯并 -五元含硫、硒杂环 -苯并 -1 5 -冠 -5 (3 )和 (4 )的合成及其对苦味酸碱金属和重金属的萃取性能和选择性 .1 实验部… 相似文献
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G. V. Kostikova O. G. Krasnova L. I. Demina V. I. Zhilov 《Russian Journal of Inorganic Chemistry》2018,63(12):1663-1666
To study the complexing processes occurring in the extraction systems, the extraction of acetic, propionic (methylacetic), monochloroacetic, dichloroacetic and trichloroacetic acids using benzo-15- crown-5 as an extractant is considered. The extraction isotherms of acids with the pure solvent and 1 M benzo-15-crown-5 in chloroform are determined. The dependences of the distribution ratios of the considered acids on the extractant concentration in the organic phase are presented. Based on the experimental data and the “blank” extraction isotherm equations, the acid: benzo-15-crown-5 ratio in the complexes formed in the extract have been calculated (minus the contribution of extraction with the pure solvent). No complexation of methylacetic acid with benzo-15-crown-5 occurs, and the stability of the complexes of chloro-substituted acetic acids rises in the order acetic acid < monochloroacetic acid < dichloroacetic acid < trichloroacetic acid. 相似文献
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The log β1 values at 25° for the reaction in aqueous solution of Tl(I) with 15-crown-5, benzo-15-crown-5, 18-crown-6 and dicyclohexyl-18-crown-6 (isomer cis-syn-cis) have been determined by d.c. and a.c. polarographic measurements. 相似文献
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N. J. Sayfullina A. K. Tashmukhamedova Kh. M. Shakhidoyatov 《Chemistry of Heterocyclic Compounds》2007,43(3):282-285
During the reaction of the amides of benzo-and dibenzocrown thiocarboxylic acids with methyl iodide in the presence of potassium
hydroxide they exhibit anomalous behavior leading to the nitriles of benzo-and dibenzocrown carboxylic acids. The nitriles
of benzo-15-crown-5-, benzo-12-crown-4-, and dibenzo-18-crown-6-4′-carboxylic acids and the dinitriles of dibenzo-18-crown-6-and
dibenzo-24-8-4′,4″(5″)-dicarboxylic acids were obtained.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 357–360, March, 2007. 相似文献
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The formation of charge transfer complex between iodine with 4’-nitrobenzo-15-crown-5(NB15C5) and benzo-15-crown-5 (B15C5) is investigated spectrophotometrically in chloroform and dichloromethane(DCM) solutions at 25℃.The pseudo-first-order rate constants for the transformation process were evaluated from the absorbance-time data and found to vary in the order of DCM > CHCl3.The values of the formation constant,Kf,for each complex are evaluated from Benesi-Hilebrand equation. Stability of the resulting complex in two solvents was also found to vary in the order of DCM > CHCl3. 相似文献
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Bogdan Boduszek Elżbieta Luboch 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):2527-2531
Synthesis of new aminomethylphosphonic acids containing benzo-15-crown-5 ether, is described. These compounds were obtained from the 4′-formylbenzo-15-crown-5 by a sequence of reactions, which afforded 4′-(aminomethylphosphono)-benzo-15-crown-5 and its N-benzyl derivative in high yields. 相似文献
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双冠醚化合物对某些金属离子比单冠醚具有更好的络合性能和选择性,它们合成、应用研究越来越受到人们的重视,本工作采用2,6-二羟甲基对甲氧基苯酚为缩合剂与芳香族冠醚缩聚,得到一系列具有双冠醚结构特征的新酚醛型聚苯并冠醚(简称聚冠醚),聚冠醚合成容易,并呈现了比相应单冠醚更优越的络合萃取能力和富集效率。 相似文献
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A copper(Ⅱ) phthalocyanine containing four benzo-15-crown-5 moieties was successfully synthesized from 4',5'-dibromobenzo-15-crown-5. The electronic absorption spectra of the phthalo-cyanine in chloroform-methanol with different amounts of KCl were measured. One can find that when the[K+]/[phthalocyanine] ratio is increased from 0 to 2, the peak at 678nm is decreased and finally disappears, and at the same time the peak at 630 nm appears and is increased. 相似文献
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A. K. Tashmukhamedova I. A. Stempnevskaya N. Zh. Saifullina M. G. Levkovich 《Chemistry of Heterocyclic Compounds》1986,22(11):1178-1185
New alkyl derivatives of benzo-15-crown-5, benzo-18-crown-6, dibenzo-18-crown-6, dibenzo-24-crown-8, and dibenzo-30-crown-10 have been obtained by their alkylation with various alcohols in the presence of polyphosphoric acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1461–1469, November, 1986. 相似文献