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  • Title: Emission color tuning and deep blue dopant materials based on 1,6-bis(N-phenyl-p-(R)-phenylamino)pyrene.
    Author: Wee KR, Ahn HC, Son HJ, Han WS, Kim JE, Cho DW, Kang SO.
    Journal: J Org Chem; 2009 Nov 06; 74(21):8472-5. PubMed ID: 19810692.
    Abstract:
    Panchromatic 1,6-bis(N-phenyl-p-(R)-phenylamino)pyrenes, 2R, were obtained from Buchwald-Hartwig coupling reactions between N-phenyl-p-(R)-phenylamines and 1,6-dibromopyrene. The photophysical properties of 2R corresponded well to the electron-withdrawing and -donating nature of the diarylamine substituents, exhibiting a full color visible range between 454 and 620 nm. In particular, a deep blue 2CN showed a high radiative rate constant of 2.85 x 10(8) s(-1) with high emission quantum efficiency of 79%. Further applications of 2CN as a blue dopant were attempted using multilayer organic light-emitting devices. A maximum efficiency of 3.98 cd/A with CIE coordinates of x = 0.14, y = 0.10 were obtained.
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