共查询到19条相似文献,搜索用时 109 毫秒
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以1-溴芘、1,6-二溴芘和9-对乙炔苯基咔唑为原料,通过Sonogashira偶联反应合成了1-(4-(9-咔唑)苯乙炔基)芘和1,6-二(4-(9-咔唑)苯乙炔基)芘两种荧光分子。经熔点、核磁共振氢谱以及元素分析等结构表征,对中间体和目标产物的紫外-可见吸收、荧光发射以及结构与性质之间的构效关系进行了研究。通过结构修饰,可有效调节此类分子的吸收及发射性质。当芘单元作为中心电子受体,以4-苯乙炔基为桥连基,引入咔唑基团作为电子给体时,其分子共轭程度、结构刚性和分子内电荷转移能力显著提高。相对于D-π-A结构的单取代化合物,双取代D-π-A-π-D结构分子的最大发射峰由422 nm红移至446 nm,荧光量子效率由0.64提升至1.08。该类化合物可作为高效的蓝光荧光材料,应用于有机光致/电致发光材料以及有机发光二极管等领域。 相似文献
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以1-溴芘、1,6-二溴芘和9-对乙炔苯基咔唑为原料,通过Sonogashira偶联反应合成了1-[4-(9-咔唑)苯乙炔基]芘和1,6-二[4-(9-咔唑)苯乙炔基]芘两种荧光分子。经熔点、核磁共振氢谱以及元素分析等结构表征,对中间体和目标产物的紫外-可见吸收、荧光发射以及结构与性质之间的构效关系进行了研究。通过结构修饰,可有效调节此类分子的吸收及发射性质。当芘单元作为中心电子受体,以4-苯乙炔基为桥连基,引入咔唑基团作为电子给体时,其分子共轭程度、结构刚性和分子内电荷转移能力显著提高。相对于D-π-A结构的单取代化合物,双取代D-π-A-π-D结构分子的最大发射峰由422 nm红移至446 nm,荧光量子效率由0.64提升至1.08。该类化合物可作为高效的蓝光荧光材料,应用于有机光致/电致发光材料以及有机发光二极管等领域。 相似文献
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文章运用MOPAC半经验量化程序,对部分染料分子结构进行计算,然后将结果和事实相对照与比较,从而分析染料分子结构与颜色的关系,并从中总结出一些规律。 相似文献
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Eugene I. Maltsev Vladimir I. Berendyaev Maria A. Brusentseva Alek R. Tameev Vladislav A. Kolesnikov Aleksey A. Kozlov Boris V. Kotov Anatoly V. Vannikov 《Polymer International》1997,42(4):404-408
Derivatives of newly synthesized aromatic polyimides containing sulphur atoms in the backbone were studied as electron–hole-transporting and light-emitting materials for use in combination with tris(8-hydroxyquinoline)-aluminium in multilayer organic electroluminescent devices. Efficient bipolar charge transport has been revealed in the polymers. Bright electroluminescence (15000cdm-2 at 14V) was observed in the visible range. The possible role of intermolecular donor–acceptor interactions in the mechanism of electroluminescence is discussed. © of SCI. 相似文献
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设计并合成了一种由咔唑和噁二唑基团构成的,具有双极载流子传导特性的新型主体材料C1PBD。通过对C1PBD的光物理和电化学性能进行研究,证明这种新型的双极主体材料可以用作为蓝色荧光器件的主体材料.利用传统蓝色荧光掺杂材料TBPe,制备了C1PBD作为主体材料的器件,并对其性能进行了表征,器件开启电压约为3.2 V,最大电流效率达到2.26 cd/A,器件表现出稳定的蓝色发光,CIE值稳定在(0.14,0.14),展现了C1PBD作为主体材料的良好性能. 相似文献
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The electrical conductivity of poly Schiff bases obtained from benzidine-3,3'-dicarboxylic acid (BDC) with diacetyl diphenyl ether (DDE) and Glyoxal (GLY) is explained with the help of Pariser-Parr-Pople calculation. The effect of functional groups on the conduction has also been elucidated. 相似文献
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探讨了自行培养的2#、4#、9#菌在降解芘过程中的相互作用关系。分别对单一菌株、菌株间两两混合、三株菌混合三种情形对芘的降解作用进行研究。研究结果表明:三株菌中2#菌株的降解效果最好,5d内累积去除率为55.99%;菌株间两两混合时2#菌株的降解受到抑制,说明菌株间有相互抑制的作用;三株菌混合对芘降解时同样表现出相互抑制作用,抑制程度大于两两混合的情况,在降解过程中,pH值总体是下降的,并周期性地交替出现产酸和脱羧反应。 相似文献
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Uuve Kirso Priit Alumaa Natalya Irha Valter Petersell Erik Teinemaa Jörgen Slet 《Polycyclic Aromatic Compounds》2013,33(1-4):55-66
Two typical Estonian soils, Brown pseudopodzolic and Rendzina, were used for sorption studies with pyrene. The soil samples were subjected to a variety of chemical and physical tests. The specific surface area reached 3.05 m2 g?1 for Rendzina, and 0.87 m2 g?1 for Brown pseudopodzolic soil. The Rendzina type of soil was characterized also by a high organic matter content (22.9%) compared with the Brown pseudopodzolic soil (6.64%). A batch technique was used to perform all adsorption studies. Koc values 2.7 × 104 mg g?1 for Rendzina and 4.5 × 104 mg g?1 for Brown pseudopodzolic were obtained. The results suggets that pyrene sorption behaviour could be in some instances mainly influenced by the composition of organic compounds in the soil, not so much by the overall organic matter content. Also the mineral part of the soil can have a impact to pyrene sorption through Ca-binded humic substances. 相似文献