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《理化检验(化学分册)》2017,(8)
<正>六氢哒嗪是具有刺激性气味的无色液体。六氢哒嗪作为一种重要的有机化工中间体,广泛应用于医药~([1])、农药和有机化工等领域~([2])。含有六氢哒嗪环的衍生物具有多种生物活性~([1,3]),文献~([4])报道了六氢哒嗪具有杀变形虫的活性。近年来人们研制出了多种以六氢哒嗪为先导化合物的强效农药。文献~([5])报道了具有高除草活性的六氢哒嗪环化合物,并成功研发了超高效除草剂——氟噻乙草酯。六氢哒嗪含有2个碱性氮原子,因此可以和酸 相似文献
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3-烷氧基-6-(4-甲苯基)哒嗪的合成及介晶性 总被引:3,自引:0,他引:3
哒嗪衍生物是一类重要的芳香杂环化合物,具有某些生理活性。我们发现,含哒嗪环桥连基的化合物具有液晶性。本文采用3,6 二取代哒嗪、对甲苯基硼酸为原料,通过钯催化交叉偶合反应合成了一系列芳基哒嗪类化合物〔3 烷氧基 6 (4 甲苯基)哒嗪〕,并对其介晶性进行了研究。合成路线为:1 实验部分1 1 主要试剂及仪器3,6 二氯哒嗪、对溴甲苯、醇、溶剂等均为国产化学纯。VarianFT 80A型核磁共振仪,CDCl3作溶剂,TMS内标;Perkin Elmer1730型傅立叶变换红外光谱仪,KBr压片;显微熔点测定仪,温度计未经校正;Carl… 相似文献
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合成了一系列的1-芳基-1,4-二氢-3-芳酰肼基甲酰基-各甲基斗哒嗪酮类化合 物,并用离体黄瓜子叶生根法测试其生物活性,生测结果表明,所有的化合物均显 示出一定的生物活性,并且芳环上的取代基对活性有重要影响.采用化合物的物理 化学参数及化合物促进黄瓜子叶生根的活性,进行了结构与活性定量关系研究,建 立了较好的结构与活性的相关式,化合物的亲脂性和取代基的电性对化合物的生物 活性具有重要的影响.研究结果对3-芳酰肼基甲酰基斗哒嗪酮类化合物的改性或新 类似物的合成具有指导意义. 相似文献
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氟代哒嗪类化合物与有一定生理活性的氟代嘧啶类化合物有着同分异构的关系。而4-氟-3,6-二氯哒嗪又是合成其它药物的重要中间体。1984年田官荣报道了4-氟-3,6-二氯哒嗪的合成及同亲核试剂的反应性能和同类化合物 相似文献
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Phenyl-4,4-di(3,6-dibutoxyphthalonitrile) ( 3 ) was synthesized by the reaction of 1,4-phenylenebisboronic acid ( 1 ) and 4-bromo-3,6-dibutoxyphthalonitrile ( 2 ), using Suzuki cross-coupling reaction. The newly synthesized compound ( 3 ) was characterized by FT-IR, MALDI-MS, ESI-MS, 1 H-NMR, 13 C-NMR, and 13 C-DEPT-135-NMR. The fluorescence property of phenyl-4,4-di(3,6-dibutoxyphthalonitrile) ( 3 ) towards various metal ions was investigated by fluorescence spectroscopy, and it was observed thatthe compound ( 3 ) displayed a significantly ‘turn-off’ response to Fe 3+ , which was referred to 1:2 complex formation between ligand ( 3 ) and Fe 3+ . The compound was also studied via density functional theory calculations revealing the interaction mechanism of the molecule with Fe 3+ ions. 相似文献
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基于N-(9-蒽甲基)-L-组氨酸的NOR荧光逻辑门 总被引:2,自引:0,他引:2
合成了一个新的组氨酸衍生物, N-(9-蒽甲基)-L-组氨酸(1), 并对其进行了元素分析、电喷雾电离质谱(ESI-MS)、核磁共振氢谱(1H-NMR)和碳谱(13C-NMR)等波谱表征. 考查了pH值及15种不同金属离子对其荧光强度的影响. 实验结果表明, 中性水溶液条件下, Zn2+和Cd2+能使体系荧光增强, 而Pb2+、Co2+、Hg2+、Ni2+和Cu2+等则使体系荧光有不同程度的猝灭.其中, Cu2+和Ni2+猝灭能力最强, 它们与化合物1均形成了物质的量比为1:2的配合物, 络合常数分别为2.88×106和1.12×106 L2·mol-2. Cu2+和Ni2+对化合物1的荧光猝灭为静态猝灭过程. 在此基础上, 以Cu2+和Ni2+作为两个输入信号, 以蒽的特征荧光发射作为输出信号, 构建了一个NOR荧光分子逻辑门. 相似文献
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三爪结构萘乙酰胺衍生物与过渡金属离子的螯合荧光增强 总被引:1,自引:0,他引:1
合成了具有三爪结构的化合物三-(1-萘乙酰胺乙基)胺(1),它对具有荧光猝灭能力的过渡金属离子具有荧光增强的效应。比较不同的过渡金属离子存在时上述化合物溶液的荧光光谱和吸收光谱变化,可以发现:在利用荧光光谱进行检测时必须注意过程中引起荧光增强和猝灭的机制,这将对考察配体与金属离子间配位能力大小作出正确估计有着重要的帮助。 相似文献
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A dehydroabietyl derivative 2 bearing a 2-(2'-hydroxyphenyl)benzimidazole unit was synthesized and its sensing behaviors toward metal ions were investigated by UV-Vis and fluorescence spectroscopy methods. In THF solution, compound 2 exhibited excellent selectivity for CuII over miscellaneous other metal ions including CrII, MnII, CoII, NiII, ZnII, CdII, AlIII, MgII, PbII, HgII, NaI, LiI and KI evidenced through the quenching of the fluorescence of the benzimidazole fragment. The reaction between 2 and Cu2+ was found to be stoichiometric with the formation of a 1:1 complex. 相似文献
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一种高灵敏度高选择性的荧光素基比色荧光锌传感器 总被引:1,自引:0,他引:1
本文报道了一种基于荧光素的锌离子传感器FN1,其在甲醇溶液中显示了对锌离子极高的灵敏度和选择性。随着锌离子的滴加,紫外-可见光谱中最初在371 nm处的吸收峰消失,在437 nm处出现了一个新峰。当在混合金属离子的甲醇溶液中滴加了相对于二价金属离子的等物质的量浓度的锌离子或相对于一价金属离子0.5倍物质的量浓度的锌离子后,锌离子积分荧光强度增强了近37倍(Φ=0.48,λmax(em)=513 nm),估算的锌离子检测限为7 μg·L-1。基于紫外-可见光、荧光和质谱的结果,讨论了1∶1的FN1/Zn2+配合物的结合机理。 相似文献
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合成了25,27-二羟基-26,28-二{3-[N-(2-萘基)-2-硫代乙酰胺]丙氧基}-5,11,17,23-四叔丁基杯[4]芳烃(2), 并利用荧光光谱考察了其在乙醇-水混合溶液中对Ag+的光谱选择性. 结果表明, 含有S2O2结合位点的探针分子2对Ag+具有良好的选择性. 通过荧光光谱连续滴定测得探针分子2-Ag+体系的猝灭常数为3.39×103 L/mol, 探针分子对Ag+的检出限可达2.34×10-7 mol/L. 在实际的Ag+检测中, 探针分子2具有一定的应用前景. 相似文献
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A new 8-hydroxyquinoline derivative having an appended boron-dipyrromethene function has been prepared, and its metal ion sensing properties were investigated. The designed compound exhibited pronounced Hg(2+)-selective on-off-type fluoroionophoric properties among the representative transition- and heavy-metal ions in aqueous dioxane solution. The fluorescence was efficiently quenched more than 98% with 5 equiv of Hg(2+) ions, and the detection limit was found to be 5 x 10(-)(6) M in a dioxane-water (1:3, v/v) solvent system. The ionophore also showed a selective chromogenic behavior toward Hg(2+) ions by changing the color of the solution from light amber to red, which can be detected with the naked eye. 相似文献
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Three new compounds bearing furyl, aryl, or thienyl moieties linked to an imidazo-crown ether system (1, 2, and 3) were synthesized and fully characterized by elemental analysis, infrared, UV-vis absorption, and emission spectroscopy, X-ray crystal diffraction, and MALDI-TOF-MS spectrometry. The interaction toward metal ions (Ca(2+), Cu(2+), Ni(2+), and Hg(2+)) and F(-) has been explored in solution by absorption and fluorescence spectroscopy. Mononuclear and binuclear metal complexes using Cu(2+) or Hg(2+) as metal centers have been synthesized and characterized. Compounds 2 and 3 show a noticeable enhancement of the fluorescence intensity in the presence of Ca(2+) and Cu(2+) ions. Moreover compound 3 presents a dual sensory detection way by modification of the fluorimetric and colorimetric properties in the presence of Cu(2+) or Hg(2+). EPR studies in frozen solution and in microcrystalline state of the dinuclear Cu(II)3 complex revealed the presence of an unique Cu(2+) type. 相似文献