5227-67-8Relevant academic research and scientific papers
ORGANIC COMPOUND, ORGANIC LIGHT EMITTING DIODE HAVING THE SAME, AND ORGANIC LIGHT EMITTING DEVICE
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Paragraph 0229; 0250-0253, (2021/02/05)
The present disclosure relates to an organic compound having the following structure, and an organic light emitting diode (OLED) and an organic light emitting device comprising the same. The organic compound is applied to a light-emitting layer, so that the driving voltage of the OLED and the organic light-emitting device is reduced, and the light-emitting efficiency and the color purity of the OLED and the organic light-emitting device are improved.
Exploration of the Photodegradation of Naphtho[2,3-g] quinoxalines and Pyrazino[2,3-b]phenazines
Kolmer-Anderl, Nicole,Kolmer, Andreas,Thiele, Christina M.,Rehahn, Matthias
supporting information, p. 5277 - 5287 (2016/04/09)
Nitrogen-containing polycyclic aromatic hydrocarbons are very attractive compounds for organic electronics applications. Their low-lying LUMO energies points towards a potential use as n-type semiconductors. Furthermore, they are expected to be more stable under ambient conditions, which is very important for the formation of semiconducting films, where materials with high purity are needed. In this study, the syntheses of naphtho[2,3-g]quinoxalines and pyrazino[2,3-b]phenazines is presented by using reaction conditions, that provide the desired products in high yields, high purity and without time-consuming purification steps. The HOMO and LUMO energies of the compounds are investigated by cyclic voltammetry and UV/Vis spectroscopy and their dependency on the nitrogen content and the terminal substituents are examined. The photostability and the degradation pathways of the naphtho[2,3-g]quinoxalines and pyrazino[2,3-b]phenazines are explored by NMR spectroscopy of irradiated samples affirming the large influence of the nitrogen atoms in the acene core on the degradation process during the irradiation. Finally, by identifying the degradations products of 2,3-dimethylnaphtho[2,3-g]quinoxaline it is possible to track down the most reactive position in the compound and, by blocking this position with nitrogen, to strongly increase the photostability.
