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设计合成了2种新型的含不同氟原子数的8-羟基喹啉衍生物配体:(E)-2-[2-(2-氟代苯基)乙烯基]-8-羟基喹啉(4a)和(E)-2-[2-(五氟苯基)乙烯基]-8-羟基喹啉(4b)及其相应的锌配合物5a和5b,利用1H NMR、IR、MS、元素分析确认了产物结构。通过紫外滴定模拟了金属锌与配体4a和4b的配位过程,测定了其在二甲基甲酰胺(DMF)溶液中的荧光性质。荧光光谱显示:配体4a和4b在DMF溶液中的λmax分别为505 nm(蓝绿色)和517 nm(绿色),配合物5a和5b的λmax分别为559 nm(青绿色)和599 nm(黄色),配位后体系共轭程度增大,荧光光谱发生明显的红移。而且随着取代氟原子的增加,配体和配合物的荧光光谱也发生明显的红移。荧光光谱显示氟原子取代数量的改变可以调控8-羟基喹啉锌配合物的发光性质。 相似文献
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设计合成了3种8-羟基喹啉衍生物配体:(E)-2-[2-(2-硝基苯基)乙烯基]-8-羟基喹啉(4a),(E)-2-[2-(3-硝基苯基)乙烯基]-8-羟基喹啉(4b),(E)-2-[2-(4-硝基苯基)乙烯基]-8-羟基喹啉(4c)及其相应的锌配合物5a~5c,产物经1H NMR,IR,MS和元素分析技术进行了结构表征.通过紫外滴定模拟了金属锌与配体的配位过程,分别测定了它们固态和溶液状态下的荧光性质:光谱显示化合物5a~5c固体荧光光谱的λmax分别是596,625,592 nm,在DMF溶液中的λmax分别是562,536,618 nm.荧光光谱显示硝基位置的改变可以调控8-羟基喹啉锌配合物的发光性质. 相似文献
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设计合成了2种含三氟甲基的8-羟基喹啉衍生物配体:(E)-2-[2-(3-三氟甲基苯基)乙烯基]-8-羟基喹啉(3a)、(E)-2-[2-(4-三氟甲基苯基)乙烯基]-8-羟基喹啉(3b)及其相应的锌配合物(4a)、(4b),并由1H NMR、IR、MS、元素分析确认了其结构。通过紫外滴定观察了金属锌与配体的配合过程,测定了它们在DMF溶液中的荧光性质;荧光光谱显示化合物3a、3b在DMF溶液中的λmax分别是491nm和513nm,4a、4b的λmax分别是585nm和599nm,而且改变三氟甲基的位置可以调节配合物的发光性能。 相似文献
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在合成含有8-羟基喹啉(8HOQ)配位基单体的基础上,将其与甲基丙烯酸甲酯(MMA)共聚得到含有8-羟基喹啉侧基的聚甲基丙烯酸甲酯(PMMA8q),实现了8-羟基喹啉的高分子化;通过PMMA8q和小分子协同配体与稀土离子Eu(Ⅲ)的配位反应,制备了两个稀土高分子发光配合物:Eu(PMMA8q)(8HOQ)2(H2O)3和Eu(PMMA8q)2(TTA)(H2O)3(TTA:噻吩甲酰三氟丙酮)。利用元素分析、红外光谱方法对各阶段产物进行了表征,用荧光光谱研究了两个稀土高分子配合物的荧光特性及发光机理。 相似文献
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在8-羟基喹啉存在下,分别采用水相法和两相法简便合成了5种取代水杨酸二茂钛配合物,并用元素分析、IR及 1H NMR等手段对配合物进行了结构表征,发现配合物中均不含8-羟基喹啉配体,而是形成以取代水杨酸为双齿配体的六元杂环化合物.用电子吸收光谱分别对两相反应体系(H2O/CHCl3)的水相和有机相进行了动态监测,发现8-羟基喹啉首先通过两相界面与有机相中的二氯二茂钛形成水溶性的过渡性配合物,然后该过渡性配合物再与有机相中的取代水杨酸作用形成了目标配合物. 相似文献
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He J Deng L Yang S 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,70(4):878-883
The beta-cyclodextrin (beta-CD) inclusion complex containing di(8-hydroxyquinoline)magnesium was prepared. The product was characterized by NMR, IR, differential thermal thermogravimetric analysis (DT-TGA), spectrofluorimetry, and elemental analysis, indicating the formation of inclusion complex in which the quinoline rings of the guest were encapsulated within the beta-CD cavities. The Job's method provided 2:1 stoichiometry for the inclusion complex between beta-CD and di(8-hydroxyquinoline)magnesium. The association constant calculated with the modified Benesi-Hildebrand equation at 25 degrees C was determined. And the mean association constant was 3577 (L/mol)2, R.S.D. was 2.58%. The thermal stability and solubility of di(8-hydroxyquinoline)magnesium were improved when forming inclusion complex. 相似文献
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Khaorapapong N Pimchan P Ogawa M 《Dalton transactions (Cambridge, England : 2003)》2011,40(22):5964-5970
Two luminescent hybrids, Znqb- and Znqp-montmorillonites (q = 8-hydroxyquinoline, b = 2,2'-bipyridine, p = 1,10-phenanthroline), were prepared by solid-solid reactions between Zn(II)-montmorillonite and two ligands (8-hydroxyquinoline and 2,2'-bipyridine or 1,10-phenanthroline) at room temperature. The intercalation and in situ complex formation of the two ligands into an interlayer space of Zn(II)-montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-vis and photoluminescence spectroscopies. The emission band of Znqb-montmorillonite was red-shifted compared to that of the mixture of Znq-montmorillonite and Znb-montmorillonite, confirming the formation of Znqb complex in montmorillonite. The photoluminescence intensity of Znqb-montmorillonite was higher than that of Znqp-montmorillonite, indicating that 2,2'-bipyridine enhanced the emission intensity of zinc(8-hydroxyquinoline) complex in montmorillonite, while the coordination of 1,10-phenanthroline quenched the intensity of the immobilized chelate. 相似文献
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Juntao Xie 《Tetrahedron letters》2005,46(49):8559-8562
A novel 8-hydroxyquinoline derivative with a carbazole group substituting in the 5-position of quinoline was synthesized, where carbazole acted as a hole transporter. The single crystal of this 8-hydroxyquinoline derivative was obtained. Its coordination complex with Al(III) was also synthesized. This complex with the ability of hole transportation and electron transportation simultaneously was soluble in common organic solvents and showed yellow luminescence with high quantum yield. 相似文献
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Stefan TsakovskiKarima Benkhedda Elisaveta IvanovaFreddy C Adams 《Analytica chimica acta》2002,453(1):143-154
8-Hydroxyquinoline (HQ), 2-methyl-8-hydroxyquinoline (CH3-HQ), 5,7-dichloro-2-methyl-8-hydroxyquinoline (Cl2-CH3-HQ), 5,7-dibromo-8-hydroxyquinoline (Br2-HQ), 5-sulfo-7-iodo-8-hydroxyquinoline (ferron) and 5-sulfo-8-hydroxyquinoline (SO3H-HQ) were compared as chelating reagents for on-line sorption preconcentration of cobalt in a knotted reactor (KR) precoated with the reagent. The results obtained with the different HQ derivatives reveal those properties of the chelating reagent responsible for the processes taking place in the KR. The influence of hydrophobicity, acidity, stability of the cobalt chelate and type of substituents in the HQ ring system on the separate steps of the flow injection (FI) preconcentration procedure are discussed. According to the performance characteristics of the different HQ derivatives, the most important parameters for on-line preconcentration in a KR are the hydrophobicity of the reagent and the stability of the chelate complex with the analyte. 相似文献
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合成了 8-羟基喹啉与β-环糊精的包合物, 通过X射线单晶衍射研究了它的晶体结构. 结果显示其不对称单元包含2个β-环糊精、1个8-羟基喹啉, 2个乙醇和30个水分子. 其中两个β-环糊精分子通过仲羟基间氢键以头对头的方式形成二聚体, 客体8-羟基喹啉被包合在此二聚体的中间区域, 分子平面与环糊精的大环平面平行, 形成了一个具有三明治夹心结构的包合物. 两个环糊精空腔各包合一个乙醇分子, 30个水分子分散在β-环糊精二聚体之间. 研究表明, β-环糊精二聚体的三明治区域是疏水的, 对于某些大小合适且具有平面构型的客体分子, 如8-羟基喹啉, 此三明治区域比β-环糊精空腔具有更强的包合能力, 这种新颖的包合方式是乙醇与8-羟基喹啉竞争包合的结果. 相似文献
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Experimental evidence suggests that the existence of only one stable cationic valency-state, in which the remaining electron shells arc empty, half-full or complete are necessary conditions for the fluorescence of a metal-8-hydroxyquinoline complex in u.v. light, The preparations of hitherto unreported compounds of 8-hydroxyquinoline with Rb, Cs, Ge, Sn and Ta are described. 相似文献
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The PMR spectra of 8-hydroxyquinoline and eighteen derivatives have been obtained at 220 MHz. For several of the compounds, PMR spectra have not been reported previously. The use of 220-MHz frequency considerably facilitates the interpretation of spectra from such complex derivatives as 2-(2'-pyridyl) and 2-(2'-thienyl)-8-hydroxyquinoline. 相似文献