6344-62-3Relevant articles and documents
A Short Route to Multiply Substituted Fluorenones
Yu, Zhanru,Velasco, Dolores
, p. 3229 - 3232 (1999)
We report a two-step synthesis of polysubstituted fluorenones by condensation of malononitrile with aromatic aldehydes and methyketones or with β-aryl-α,β-unsaturated carbonyl compounds, aldehydes or ketones. The yields of the fluorenone systems depend on the nature of the substitution on the aromatic rings.
Spirobifluorene Regioisomerism: A Structure–Property Relationship Study
Sicard, Lambert,Quinton, Cassandre,Peltier, Jean-David,Tondelier, Denis,Geffroy, Bernard,Biapo, Urelle,Métivier, Rémi,Jeannin, Olivier,Rault-Berthelot, Jo?lle,Poriel, Cyril
supporting information, p. 7719 - 7727 (2017/06/06)
The present works report the first structure–property relationship study of a key class of organic semiconductors, that is, the four spirobifluorene positional isomers possessing a para-, meta- or ortho-linkage. The remarkable and surprising impact of the ring bridging and of the linkages on the electronic properties of the regioisomers has been particularly highlighted and rationalised. The impact of the ring bridging on the photophysical properties has been stressed with notably the different influence of the linkages and the bridge on the singlet and triplet excited states. The first member of a new family of spirobifluorenes substituted in the 1-position, which presents better performance in blue phosphorescent OLEDs than those of its regioisomers, is reported. These features highlight not only the great potential of 1-substituted spirobifluorenes, but also the remarkable impact of regioisomerism on electronic properties.
BENZOFLUORANTHENE COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE USING THE COMPOUND
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Page/Page column 68, (2008/12/07)
There are provided a novel benzofluoranthene compound and an organic light-emitting device which uses the benzofluoranthene compound, gives a blue emission hue with extremely good purity, and has an optical output with a high efficiency, a high luminance, and a long life. Specifically, there are provided a benzofluoranthene compound represented by the general formula shown below and an organic light-emitting device including a pair of electrodes including an anode and a cathode one of which is a transparent or translucent electrode material, and an organic compound layer disposed between the pair of electrodes and including a material for an organic light-emitting device containing the benzofluoranthene compound. In the general formula (1), one of X1, X2, X3, X4, X5, and X6 represents a substituted or unsubstituted fused heterocyclic group having four or less rings, and the others of X1, X2, X3, X4, X5, and X6 each represent a hydrogen atom.