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: In this paper, a 9-fluorenone monomeric unit (FOne) has been used as comonomer in conjunction with the more classical 9,9-di-n-nonylfluorene unit.
Abstract: We have synthesized and characterized a new fluorene copolymer exhibiting bright yellow luminescence. In order to ensure a complete π-stacking of the active layer, a 9-fluorenone monomeric unit (FOne) has been used as comonomer in conjunction with the more classical 9,9-di-n-nonylfluorene unit. As expected with fluorene-based materials, when excited at 370 nm, the corresponding dilute copolymer solution photoluminescence spectra exhibit a main peak centered at 450 nm in the blue part of the visible spectrum. However, in the solid state, immediate structural reorganization of the layer occurs, leading to a red-shifted emission (bright yellow emission) centered at 550 nm. The origin of the emitted light has been attributed to excimers and/or aggregates based on short FOne segments and involves mainly exciton transfer between nonaggregated fluorene segments and aggregated ones. It is noteworthy that organic light-emitting devices based on these new materials exhibit no spectral evolution upon device operatio...
75 citations
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TL;DR: In this article, a biphenylene reaction with the rhodium(I) dimer (dtbpm)RhCl]2 (1) was shown to yield a new five-coordinate complex, (PPh3)2Rh(2,2‘-biphenyl)Cl (3), when the base is triphenylphosphine.
75 citations
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74 citations
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74 citations
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TL;DR: In this article, a new family of redox mediators, nitro-fluorenone derivatives, is used to modify the surface of glassy carbon electrodes, and the stable, adherent thin layer can be transformed electrochemically into the corresponding hydroxylamine compound.
71 citations