- SYNTHESIS OF PHENYL-SUBSTITUTED FLUORANTHENES BY A DIESEL-ALDER REACTION AND THE USE THEREOF
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The invention relates to fluoranthene derivatives of general formula (I). Said invention also relates to a method for producing and using the inventive fluoranthene derivatives in the form of emitting molecules in organic light-emitting diodes (OLEDs), a light emitting layer containing the inventive fluoranthene derivatives in the form of emitting molecules, an OLED containing said inventive light emitting layer and devices containing the inventive OLED.
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Page/Page column 27
(2008/06/13)
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- From branched hydrocarbon propellers to C3-symmetric graphite disks
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Branched hydrocarbon propellers (9 and 12) were prepared by stepwise palladium-catalyzed Hagihara-Sonogashira coupling reactions and Diels-Alder cycloadditions and submitted to oxidative cyclodehydrogenation by FeCl 3 to afford two new giant graphite disks 2 and 3 with 3-fold symmetry in high yield. One of the precursors, the polyphenylene dendrimer 9 containing 150 carbon atoms, was crystallographically characterized. The poorly soluble graphite disks were characterized by isotope-resolved MALDI-TOF mass spectroscopy, and their electronic and vibrational properties were investigated by solid-state UV-vis and Raman spectroscopy. The effect of molecular size and geometry on their properties was discussed. The molecule 2 represents the largest, 3-fold-symmetric all-benzenoid graphite disk, and the five-membered rings in molecule 3 open the opportunity to synthesize large bowl-shaped PAHs.
- Wu, Jishan,Tomovic, Zeljko,Enkelmann, Volker,Muellen, Klaus
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p. 5179 - 5186
(2007/10/03)
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