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香豆素类化合物作为天然产物的一类重要物质,是重要的医药中间体。本文概括了香豆素类化合物的经典合成方法及近年来一些新型的合成方法,并介绍了这些合成方法的优缺点,为香豆素类化合物的研究提供了依据。 相似文献
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本文合成了3,3'对亚苯基双香豆素及四个新的衍生物,并对其光谱性能进行了研究。 相似文献
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合成了6个3,4-二(2’-芳基-1’,3’,4’-噁二唑基)呋喃,化合物的结构经1H NMR、FTIR、MS表征。初步发光性能表明,在272~293 nm出现最大紫外-可见吸收峰;在DMF溶液中,341~375 nm出现最大荧光发射峰,是一类紫色发光材料。 相似文献
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新型香豆素类荧光染料的合成研究 总被引:3,自引:0,他引:3
以7-二乙氨基-4-氯-3-甲醛基香豆素为基础合成了7只新型香豆素类的荧光染料。本类染料具有强烈的荧光,随着分子内π-共轭体系的增大,染料的色光从黄色增至红色。 相似文献
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以对氰基氯苄为原料与取代的邻氨基苯酚反应,合成了标题化合物。测定了此类化合物的紫外光谱和荧光光谱,并以硫酸喹宁为参比标准测定了化合物的荧光量子产率。研究了分子结构与紫外光谱、荧光光谱的关系。 相似文献
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设计合成了3-氯水杨醛与4,4,-二氨基二苯基甲烷、4,4-双氨基苯砜、乙二胺、丙二胺形成的4个席夫碱化合物L1-L4;通过红外光谱对化合物的组成和结构进行表征,并对其荧光性质进行了研究. 相似文献
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以对氰基氯苄为原料,与取代的邻氨基苯酚反应,合成了一系列标题化合物.测定了此类化合物的紫外光谱和荧光光谱,并以硫酸奎宁为参比标准测定了化合物的荧光量子产率.研究了分子结构与紫外光谱、荧光光谱的关系. 相似文献
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以香豆素为原料,合成了3个香豆素席夫碱化合物,用元素分析、红外光谱和核磁共振对其结构进行了表征。测定了化合物4、5的荧光光谱,结果表明:所测定的化合物表现出双光子荧光特性,这种香豆素席夫碱结构单元对于合成新型高效双光子荧光有机化合物具有潜在的价值。 相似文献
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《国际聚合物材料杂志》2012,61(2):199-211
A novel type of asymmetrical polymerizable fluorescent brighteners was synthesized using 4-nitro-4-aminostilbene-2,2′-disulfonic acid (ANSD) and cyanuric chloride as raw materials, through reduction reaction of sodium hydrosulfide and condensation reaction of variant amine compounds replacing the chlorine of triazine rings, containing another dibasic triazine compound grafted polyaminamide. The ultraviolet absorption and fluorescence emission properties, photoinduced isomerization phenomena and application properties of the asymmetrical polymerizable fluorescent brighteners, asymmetrical and symmetrical fluorescent brighteners in aqueous solutions, tetrahydrofuran(THF) N,N-dimethyl formamide (DMF) were particularly investigated. The fluorescence quantum yield was determined using quinine sulfate in 0.5 mol/l H2SO4(ΦF = 0.55) as the fluorescence standard. The effect of concentration and polarity of solvents on fluorescence properties was observed. Results show that the ultraviolet absorption and dyeing properties as well as light stability of the prepared asymmetrical polymerizable fluorescent brighteners increased obviously compared with asymmetrical and symmetrical FBs with the phenomena of photoinduced isomerization decreasing. It was found that the polarity of the solvents influences the quantum yield of fluorescence and has only a small effect upon the positions of the absorption and fluorescence maxima of FBs. Meanwhile, concentration of trans- and cis-isomers depends on the nature of the substituents. 相似文献
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Edison Rafael Jimnez Manuel Caetano Nelson Santiago F. Javier Torres Thibault Terencio Hortensia Rodríguez 《International journal of molecular sciences》2021,22(1)
Recently, several studies have demonstrated that diaminodicyanoquinone derivatives (DADQs) could present interesting fluorescence properties. Furthermore, some DADQs under the solid state are capable of showing quantum yields that can reach values of 90%. Besides, the diaminodiacyanoquinone core represents a versatile building block propense either to modification or integration into different systems to obtain and provide them unique photophysical features. Herein, we carried out a theoretical study on the fluorescence properties of three different diaminodicyanoquinodimethane systems. Therefore, time-dependent density functional theory (TD-DFT) was used to obtain the values associated with the dipole moments, oscillator strengths, and the conformational energies between the ground and the first excited states of each molecule. The results suggest that only two of the three studied systems possess significant luminescent properties. In a further stage, the theoretical insights were confirmed by means of experimental measurements, which not only retrieved the photoluminescence of the DADQs, but also suggest a preliminary and promising antibacterial activity of these systems. 相似文献
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合成了三甘醇苯并[5,6]香豆素-3-甲酸酯(Ⅳ)并经1HNMR1、3CNMR、FTIR、MS及元素分析确证。化合物Ⅳ和三甘醇二苯并[5,6]香豆素-3-甲酸酯(Ⅴ)发出蓝色荧光,它们的最大发射波长λem受溶剂极性影响较小。甲醇和乙醇能使Ⅴ的荧光强度增强,二甲亚砜是该类物质的荧光猝灭试剂。在乙腈中,Ca2+能使化合物Ⅳ荧光强度降低30%,而使化合物Ⅴ荧光强度增大40%。 相似文献