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Issue 14, 2016
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Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

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Abstract

Pyrene was derivatized in positions 1, 3, 6, and 8 to yield a series of nine tetraarylpyrenes for which absorption, emission, emission lifetimes and solvatochromism in solution were determined. The fluorescence quantum yields in thin films and crystalline state, electrochemistry, and quantum-chemical calculations were completed for the series along with the X-ray crystal structure analysis of compounds 1, 2, 4, 5, 7, and 9. Compounds 2, 3, 4 as well as 7 were identified as the most suitable candidates for OLED application. Notably, in an unoptimized single-layer device geometry, these compounds exhibited blue electroluminescence coupled with impressively low turn-on voltages and high maximum luminances such as 2.8 V and 13 542 cd m−2 at 8.2 V for compound 2, respectively.

Graphical abstract: Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

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Submitted
10 sep. 2015
Accepted
01 okt. 2015
First published
15 okt. 2015

J. Mater. Chem. C, 2016,4, 3041-3058
Article type
Paper

Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

T. H. El-Assaad, M. Auer, R. Castañeda, K. M. Hallal, F. M. Jradi, L. Mosca, R. S. Khnayzer, D. Patra, T. V. Timofeeva, J. Brédas, E. J. W. List-Kratochvil, B. Wex and B. R. Kaafarani, J. Mater. Chem. C, 2016, 4, 3041
DOI: 10.1039/C5TC02849C

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