共查询到20条相似文献,搜索用时 15 毫秒
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冠醚对金属离子,特别是碱金属离子,有络合作用,可以作为离子选择电极的活性物质[1-3].在苯并冠醚的苯环上导入烷基,能缩短电极的响应时间[2,3]. 相似文献
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Ruifei Su Hongyu Wei Xin Zhang Sufang Ma Jing Yan Yuan Cui Zhao Zhang 《Journal of heterocyclic chemistry》2014,51(3):669-673
A series of novel monodisperse, well‐defined molecules with a pyridine core and carbazole arms were synthesized by simple procedures with Iodo‐reaction and Ullmann reaction. Their structures were confirmed by IR, 1H NMR, 13C NMR, and elementary analysis. Moreover, the fluorescence spectra showed that these compounds exhibited strong fluorescence with the maximum wavelengths ranging from 373 to 385 nm. 相似文献
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Shuji Kondo Hideki Mori Misako Kadomatsu Koji Sato Tsugumichi Ando Tomohiko Kakuno 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(6):811-819
Abstract Reaction of 2,4-dichloro-6-phenyl-1,3,5-triazines with bis(4-mercaptophenyl) sulfide in the presence of a base in THF afforded the corresponding condensation polymer as a whole aromatic polythioether in moderate yield. The polymerization of several 2,4-dichloro-1,3,5-triazine derivatives with this dithiols also proceeded in the o-dichlorobenzene-water two-phase system by using phase transfer catalysts. The resulting polymers consisted of THF-soluble and -insoluble fractions. The x-ray diffraction pattern indicated that these THF-insoluble polymers have a highly crystalline nature. Further, the polymers obtained here showed high thermal stability. 相似文献
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Ismaël Rabouel Nicolas Richy Anissa Amar Abdou Boucekkine Thierry Roisnel Olivier Mongin Mark G. Humphrey Frdric Paul 《Molecules (Basel, Switzerland)》2020,25(22)
The synthesis of four new 1,3,5-triaryl-1,3,5-triazinane-2,4,6-trithione derivatives (thioisocyanurates) and two new partially thionated analogues from the corresponding 1,3,5-triaryl-1,3,5-triazinane-2,4,6-triones (isocyanurates) is reported, together with their spectroscopic properties. DFT calculations and comparison with the corresponding isocyanurates evidence the impact of the oxygen-for-sulfur replacement on the electronic structure and linear optical properties of these heterocycles. A bathochromic shift of the absorption bands and more efficient quenching of the fluorescence was observed. 相似文献
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V. I. Kelarev M. A. Silin K. I. Kobrakov I. I. Rybina V. K. Korolev 《Chemistry of Heterocyclic Compounds》2003,39(6):736-743
N1-Phenyl- and N1-(3,5-dichloro-2-pyridyl)amidrazones have been synthesized by the reaction of imino esters of heterocyclic acids with phenyl- or (3,5-dichloro-2-pyridyl)hydrazine. Acylation of the products with acid chlorides leads to 1-phenyl- and 1-(3,5-dichloro-2-pyridyl)-3-hetaryl-5-R2-1H-1,2,4-triazoles. Compounds of this type are also formed by the condensation of N-acylimino esters of heterocyclic acids with phenyl- or (3,5-dichloro-2-pyridyl)hydrazine. 相似文献
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High-pressure synthesis and crystal structures of the homologous series AuBa2(Ca,Ln)n−1CunO2n+3 (n = 1–4; Ln = rare-earth cations) are described. Their crystal structures and superconducting properties are compared with the corresponding members of the Hg-homologous series. Numerous cuprates containing flat structural fragments (CuO4, CO3 and BO3) synthesized mainly at high pressure are compared in terms of structural peculiarities and superconducting properties. Importance and future prospects of high-pressure application for the preparation of new superconducting oxides are discussed. 相似文献
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2,4,6-三氯-1,3,5-三嗪与亚胺基二(乙酸乙酯)进行亲核取代反应制得1,3,5-三嗪核-六酯基树枝状化合物(1);1经乙二胺酰胺化制得1,3,5-三嗪核-六乙二胺基树枝状化合物(2);2与丙烯酸甲酯进行Michael加成反应制得1,3,5-三嗪核-六胺基-十二酯基树枝状化合物(3);3再经乙二胺酰胺化制得1,3,5-三嗪核-六胺基-十二胺基树枝状化合物(4);4与香兰醛在乙醇中反应合成了末端含香兰醛亚胺Schiff碱的1,3,5-三嗪核-聚酰胺树枝状化合物,其结构经NMR和IR表征. 相似文献
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采用乌尔曼缩合反应合成了新型的咔唑基树状分子;利用核磁共振谱仪(1HNMR,13CNMR)和飞行时间质谱仪(MALDI-TOF-Mass)对其进行了表征;并评价了树状分子的荧光性能和电化学性能.结果表明,所合成的咔唑基树状化合物在394nm处发蓝光,同时具有低的HOMO能级. 相似文献
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Popov L. D. Scherbakov I. N. Borodkin S. A. Revinskii Yu. V. Kazoyan E. A. Shaginyan G. A. Sarkisyan A. R. Markaryan Sh. A. 《Russian Journal of General Chemistry》2019,89(5):906-912
Condensation of 4-hydroxy-3-formylcoumarin with 4-aminobenzyl(triphenyl)phosphonium bromide has led to the formation of a phosphonium salt existing in DMSO solution as a mixture of two enamine forms, Z and E, according to NMR spectroscopy and quantum-chemical simulations data. Basing on the obtained salt, the ML2 metal chelates of zinc(II), copper(II), and nickel(II) have been synthesized. Luminescence properties of the ligand and its complex with zinc have been studied.
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Victoria M. Alpatova Evgeny G. Rys Elena G. Kononova Ekaterina A. Khakina Alina A. Markova Anna V. Shibaeva Vladimir A. Kuzmin Valentina A. Olshevskaya 《Molecules (Basel, Switzerland)》2022,27(19)
2,4,6-Trichloro-1,3,5-triazine (cyanuric chloride) is an excellent coupling reagent for the preparation of highly structured multifunctional molecules. Three component systems based on porphyrin, cyanuric chloride and carborane clusters were prepared by a one-pot stepwise amination of cyanuric chloride with 5-(4-aminophenyl)-10,15,20-triphenylporphyrin, followed by replacement of the remaining chlorine atoms with carborane S- or N-nucleophiles. Some variants of 1,3,5-triazine derivatives containing porphyrin, carborane and residues of biologically active compounds such as maleimide, glycine methyl ester as well as thioglycolic acid, mercaptoethanol and hexafluoroisopropanol were also prepared. A careful control of the reaction temperature during the substitution reactions will allow the synthesis of desired compounds in a good to high yields. The structures of synthesized compounds were determined with UV-vis, IR, 1H NMR, 11B NMR, MALDI-TOF or LC-MS spectroscopic data. The dark and photocytotoxicity as well as intracellular localization and photoinduced cell death for compounds 8, 9, 17, 18 and 24 were evaluated. 相似文献
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Ignashevich A. N. Shavrina T. V. Shklyaeva E. V. Abashev G. G. 《Russian Journal of Organic Chemistry》2020,56(11):1920-1928
Russian Journal of Organic Chemistry - A new series of chalcones bearing two or more 3,4-ethylenedioxythiophene fragments were synthesized, and their optical properties were studied. The Stokes... 相似文献
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以咔唑和正丁基锂为原料,采用schlenk技术合成了一系列新的含茂基咔唑镧系金属有机配合物--Cp2LnL(Cp=环戊二烯基;Ln=Yb,Er,Ho,Tb,Gd,Sm;L=咔唑基),其结构经IR,MS和元素分析表征. 相似文献