本文主要通过钯的设计和合成三种新型的具有1,3,4-恶二唑单元(缩写为CHEM-6(ac)),具有施主-π-受体-π'-Donor'结构的共轭有机分子。催化的铃木交叉偶联反应。这些化合物的分子结构通过多种光谱和分析技术进行表征,即1 H NMR,13C NMR,FT-IR,GC-MS和元素分析。这些化合物的光学性质已通过使用紫外可见吸收和荧光光谱法进行了研究。另外,对固态样品(薄膜)进行了PL研究。此外,对溶剂变色和密度泛函理论(DFT)的计算进行了详细研究。实验测得的光学带隙(E g opt)化合物CHEM-6a,CHEM-6b和CHEM-6c的值分别确定为3.11、3.03和2.70 eV。DSC和TGA结果表明该化合物表现出良好的热稳定性。当前结果表明,化合物CHEM-6(ac)是有前途的候选物,并可能在光电子器件领域中发挥重要作用,并有可能在OLED的开发中找到潜在的应用。另外,化
Blackhall, Alexander; Brydon, Donald L.; Javaid, Khalid, Journal of Chemical Research, Miniprint, 1984, # 12, p. 3485 - 3497
作者:Blackhall, Alexander、Brydon, Donald L.、Javaid, Khalid、Sagar, Anthony J. G.、Smith, David M.
DOI:——
日期:——
Yasinskii,O.A. et al., Journal of general chemistry of the USSR, 1977, vol. 47, p. 194 - 198
作者:Yasinskii,O.A. et al.
DOI:——
日期:——
Preparation of Functionalized Polystyrene-<i>b</i><i>lock</i>-polyisoprene Copolymers and Their Luminescence Properties
作者:Sijian Hou、Wai Kin Chan
DOI:10.1021/ma0107206
日期:2002.1.1
A series of block copolymers functionalized with aromatic 1,3,4-oxadiazole and stilbene, derivatives have been synthesized by the palladium catalyzed reaction between polystyrene-block-polyisoprene and different functional units. These polymers exhibited different emission properties in solution and in the solid state. In chloroform solution, they showed relatively narrow and featured emission bands while, in the solid state, the emission band was broadened and showed a significant red shift. These observations were attributed to the formation of aggregates between the luminophores. After some oxadiazole functionalized copolymers were annealed at elevated temperature, such aggregation was enhanced and there were further changes in the emission spectra. For the bifunctional copolymers, such a shift in the emission band was not significant because the presence of two different chemical species in the same block may prevent the same type of luminophores from aggregating together.
Convenient preparation of unsymmetrical 2,5-disubstituted 1,3,4-oxadiazoles promoted by Dess–Martin reagent
作者:Cristian Dobrotă、Codruţa C. Paraschivescu、Ioana Dumitru、Mihaela Matache、Ion Baciu、Lavinia L. Ruţă
DOI:10.1016/j.tetlet.2009.02.054
日期:2009.4
2,5-Disubstituted 1,3,4-oxadiazoles have been conveniently prepared by oxidative cyclization of N-acyl-N'-aryliden-hydrazines promoted by all excess or Dess-Martin periodinane under Mild conditions (23 examples, up to 92% isolated yields). (C) 2009 Elsevier Ltd. All rights reserved.