Topic
Fluorenone
About: Fluorenone is a research topic. Over the lifetime, 1067 publications have been published within this topic receiving 17162 citations. The topic is also known as: Diphenylene ketone & 9-Oxofluorene.
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TL;DR: It is shown that the introduction of TPA groups leads specifically both to an antioxidant action and a reduced ET towards residual defect sites, thanks to the environmental micro-encapsulation role played by TPA units surrounding the polymer backbone.
Abstract: In order to understand the factors responsible for the improved efficiency and stability of organic light-emitting diodes (OLEDs) based on poly(9,9-dioctylfluorene) (PFO) when triphenylamine (TPA) is introduced as lateral fluorene substituent, we synthetize mono-disperse fluorene-thiophene oligomers as model compounds. Their blends with different concentrations of the fluorenone containing oligomer are studied in order to verify if only a reduction of ketonic defect sites or also an impeded energy transfer (ET) towards such sites are responsible for the suppression of the green emission band. We show that the introduction of TPA groups leads specifically both to an antioxidant action and a reduced ET towards residual defect sites, thanks to the environmental micro-encapsulation role played by TPA units surrounding the polymer backbone. As a result, the performances and colour stability of a device fabricated with TPA-substituted PFO (PFTPA) are strongly improved with respect to standard PFO device prepared in the same conditions.
22 citations
22 citations
TL;DR: In this paper, a singular-value-decomposition analysis of the observed time-resolved spectra of fluorenone in the lowest excited singlet (S 1 ) and lowest excited triplet (T 1 ) states has been obtained for a polar solvent, as well as that in the T 1 state in a nonpolar solvent.
22 citations
TL;DR: In this article, the coordination assembly of dimeric fluorenone ketyl (pinacolate, C26H16O22−) with boron subphthalocyanine (BSubPc) was obtained in the complex with fullerene, featuring an effective π-π interaction between concave-shaped BSubPc macrocycle and spherical C60 molecules.
Abstract: Coordination assembly of dimeric fluorenone ketyl (pinacolate, C26H16O22−) with boron subphthalocyanine (BSubPc) was obtained in the complex with fullerene, {(BSubPc)2(C26H16O2)}·C60, featuring an effective π–π interaction between concave-shaped BSubPc macrocycle and spherical C60 molecules.
22 citations
TL;DR: Radioactive fluorene hydroperoxide has been identified in reaction mixtures hydroxylating [9-14C]fluorene and can be an intermediate in thehydroxylation of [ 9- 14C] Fluorene by rat liver homogenate.
22 citations