共查询到18条相似文献,搜索用时 62 毫秒
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以咔唑、亚芴基肼等为原料,通过suzuki反应合成了2个新型咔唑衍生物:N-乙基-3,6-双(亚芴基肼基-5-亚甲基-2-噻吩)咔唑(S1)和N-(亚芴基肼基-4-亚甲基苯基)-3,6-双(亚芴基肼基-5-亚甲基-2-噻吩)咔唑(S2)。用FTIR、1HNMR、元素分析对S1和S2的结构进行表征,并考察其紫外吸收光谱、荧光光谱、电化学行为和热稳定性。结果表明:S1和S2薄膜的最大发射波长分别在637和649nm处,均发射红色荧光,且S1和S2均具有良好的聚集诱导发光(AIE)特性;S1和S2的HOMO能级分别是-5.26和-5.29e V,与正电极(ITO)的功函数(-4.8 e V)相匹配,可有效降低空穴注入能垒,有利于空穴的传输;S1和S2的热分解温度分别是351和360℃,均具有良好的热稳定性。 相似文献
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以3-溴-9,9-二甲基芴为原料,通过Buchwald-Hartwig偶联反应合成了一种新化合物N,N′-二(联苯-4-基)-N,N′-二(9,9-二甲基芴-3-基)-9-苯基咔唑-2,7-二胺(2),其结构和性能经FL, UV-Vis, 1H NMR, GC-MS(EI),元素分析和TG-DSC表征。结果表明:2具有较好的热稳定性和较高的玻璃化温度,失重5%的温度为452 ℃,玻璃化温度为176 ℃;在425 nm波长激发下,2在445 nm处发出较强荧光(蓝光)。 相似文献
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设计合成了含哌嗪基团的咔唑衍生物,N,N'-二[3-(N-咔唑)苯基]-哌嗪.在溶液中该化合物具有很强的蓝色荧光和高的量子产率为0.94,可作为荧光材料.在水和N,N-二甲基甲酰胺(DMF)的混合溶液中随溶液的pH值的降低而降低,化合物的最大发射峰降低幅度达到了94%.荧光的降低是由于化合物中的N原子与质子的结合引起的... 相似文献
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新型咔唑衍生物的合成及其晶体结构 总被引:1,自引:0,他引:1
通过9-乙基咔唑-3-甲醛与4-氨基-3,5-二甲基-1,2,4-三氮唑反应,合成了一种新型咔唑衍生物-- 9-乙基咔唑-3-甲醛缩4-氨基-3,5-二乙基-1,2,4-三氮唑(1),其结构经1H NMR, IR和X-射线单晶衍射表征.1属单斜晶系,P2(1)/n空间群,晶胞参数为:a=8.829(8)(A), b=9.863(10)(A), c=19.530(15)(A), β=101.65(5)°, V=1 666(3)(A)3, Dc=1.266 g·cm-3, Z=4, F(000)=672, μ=0.079 mm-1.最终偏离因子R1=0.075 6. 相似文献
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以2,2′-联吡啶(L1)为基础,合成了5,5′-二溴-2,2′-联吡啶(L2),5-咔唑-5′-溴-2,2′-联吡啶(L3),5,5′-二咔唑-2,2′-联吡啶(L4)3个N,N-双齿配体,然后以二苯甲酰甲烷(DBM)作为第一配体合成了这4种配体相应的铕配合物。在387 nm激发条件下,配合物都表现出非常强的铕离子5D0-7FJ (J=0,1,2,3,4)的特征发射。引入咔唑基团后,不仅扩大了配合物吸收光能的范围、增强了配合物的吸收强度,而且提高了配合物的光致发光性能。 相似文献
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A new molecule of 3,6‐Bis(1‐methyl‐4‐vinylpyridium iodine)carbazole ( BMVC ) was synthesized for stabilizing the quadruplex structure of human telomeric sequence of d(T2AG3)4 in vitro. Mixing BMVC with the DNA can raise the melting temperature of the d(T2AG3)4 by ~ 13 °C, implying that BMVC could be a useful telomerase inhibitor. In addition, the fluorescence of the BMVC increased significantly upon interacting with the d(T2AG3)4 which may be useful as a G‐quadruplex specific marker. 相似文献
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《结构化学》2017,(1)
A novel carbazole derivative 2-cyano-3-(9-ethyl-9H-carbazol-3-yl)-acrylic acid ethyl ester(L) was designed and synthesized through Vilsmeier and Knoevenagelreactions, which was characterized by FT-IR, ~1H NMR and13 C NMR spectra. The crystal of L crystallizes in the monoclinic system, space group P21/c with a = 10.8298(15), b = 13.4660(19), c = 15.4358(16) ?, β = 131.214(6)o, V = 1693.4(4) ?~3, Z = 4, Dc = 1.249 g/cm~3, Mr = 318.36, μ = 0.082 mm-1, F(000) = 672, completeness to theta was 99.9% and GOOF = 1.091.Rint = 0.0338, R(I 2σ(I)) = 0.0631, w R(I 2σ(I)) = 0.1861, R(all data) = 0.1027 andw R(all data) = 0.2105. There were three types of weak intermolecular interactions(C(8)–H(8)···N(2), C(14)–H(14)···O(2) and C(20B)– H(20B)···π)among the adjacent molecules to construct a three-dimensional single crystal. The UV-Vis spectra, fluorescence emission and time-dependent density functional theory(TD-DFT) calculation of L were studied and the results revealedthe existence of intramolecular charge transfer(ICT) process of L molecule. The optical properties indicated that it can be used as a potential candidate in the application oforganic light emitting diodes(OLEDs). 相似文献
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The unique diazafluoranthene alkaloid eupolauridine (1) was synthesized by a three-step route utilizing as the initial step the thermal rearrangement of the oxime O-crotyl ether 12, which afforded onychine (2). Bracher pyridine synthesis procedure subsequently converted 2 into 1. On the other hand, Friedländer reaction was employed for the synthesis of 3, which is a benzo-annulated derivative of eupolauridine (1). 相似文献
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A short method for the preparation of racemic threo- and erythro-methylphenidate derivatives is described. Condensation between α-ethoxy carbamate 1 and silyl ketene acetals 2a-b in the presence of TESOTf (20 mol%) afforded a 1.5:1 mixture of carbamates 3a-b/4a-b. Hydrogenolysis in EtOH followed by treatment with 3N HCl/MeOH afforded the corresponding hydrochlorides 7a-b/8a-b in good yields. 相似文献