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 article, the effect of keto defects in fluorene units on the performance of organic field effect transistors (OFETs) was examined based on BFTT and biphenyl end-capped fused bithiophenes (BPTT) oligomers.
Abstract: The effect of keto defects in fluorene units on the performance of organic field-effect transistors (OFETs) was examined based on fluorene end-capped fused bithiophenes (BFTT) and biphenyl end-capped fused bithiophene oligomers (BPTT). The formation of keto defects after various periods of UV illumination in air on BFTT films was confirmed by the increase of the long-wavelength emission at 2.1–2.3eV in the photoluminescent (PL) spectrum and the generation of a Fourier transfer infrared (FTIR) peak at 1721cm−1, corresponding to the carbonyl stretching mode of the fluorenone moiety. For both BPTT films irradiated in air and BFTT in nitrogen, i.e., a keto-free system, no increase in long-wavelength emission in the PL spectrum, was found and the peak corresponding to the carbonyl stretching mode of the fluorenone moiety was absent in the FTIR spectrum. The threshold voltage, i.e., switch-on voltage, of the OFETs was increased and the field-effect mobility and on-state drain current were rapidly decreased afte...
24 citations
TL;DR: Several isopropylidene derivatives have been synthesized as discussed by the authors, including benzylidenes and benzhydrylidene-norbornadiene derivatives (11, 16).
Abstract: Several isopropylidene-, benzylidene- and benzhydrylidene-norbornadiene derivatives (11, 16) have been synthesized. The [2π+2π] cycloadditions leading to the tetracyclic isomers 12 and 17 resp. upon direct photoexcitation proceed practically quantitatively in the case of the trienes 11, much less specifically, however, with 16. Sensitization by acetone or fluorenone allows the isolation of the quadricyclanes 17 in 20–90% yields.
24 citations
TL;DR: In this article, the reactions of the acetophenone and fluorenone acylhydrazones under acylation conditions were investigated, and the structures of diacylhydrazone and 1,3,4-oxadiazolines formed were proved by UV, IR, 1 H- and 13 C-NMR spectroscopical as well as by MS evidences.
24 citations
TL;DR: In this article, it was shown that the compounds in crude terephthalic acid which cause the yellow colour of derived PET polymer are carboxylic acid derivatives of anthraquinone and fluorenone.
23 citations
TL;DR: In this article, a novel chromogenic receptor, 1-(naphthalen-1yl)-3-(9-oxo-9 H -fluoren-1-yl)urea ( 1 ), utilizing fluorenone and naphthalene moieties as signaling groups was designed and synthesized.
23 citations