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: The photopolymerization activities of three novel perester derivatives of fluorenone and a mono and tetra-tert-butylperester derivative of benzophenone in methyl methacrylate (MMA) and an ethoxylated bis-phenol-A diacylate have been studied using a combination of gel permeation chromatography (GPC), photodifferential scanning calorimetry (PDSC) and real time Fourier transform i.r. spectroscopy (RTFTIR) as discussed by the authors.
25 citations
TL;DR: In this paper, isosbestic points in the absorption spectra of fluorenone were observed in mixed solvents comprising ethanol-cyclohexane and ethanol-acetonitrile, indicating the formation of a 1 : 1 hydrogen-bonded complex.
Abstract: The absorption and fluorescence spectra of fluorenone have been observed in various solvents. The fluorescence intensity increases with increasing solvent polarity, except in alcoholic solvents. The relative fluorescence intensity of fluorenone in acetonitrile is about 14-times greater than that in methanol. There are isosbestic points in the absorption spectra of fluorenone in mixed solvents comprising ethanol–cyclohexane and ethanol–acetonitrile, indicating the formation of a 1 : 1 hydrogen-bonded complex between fluorenone and ethanol. The equilibrium constants for the complex formation are estimated to be 2.0 ± 0.5 and 0.6 ± 0.2 mol−1 dm3 in ethanol–cyclohexane and ethanol–acetonitrile solvents, respectively. The results indicate that the complex formation changes the relative energy of the singlet and triplet states, which have n–π* and π–π* characters, respectively. The complex formation causes a strong fluorescence quenching of fluorenone in the alcohols. A plot of the fluorescence quenching also s...
25 citations
TL;DR: A low band gap polyfluorene derivative, poly(2,7-bis-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-fluoren-9-one) (PEFE), containing ethylenedioxythiophene as donor and fluorenone (FO) as acceptor groups was electrochemically synthesized as mentioned in this paper.
25 citations
24 citations
TL;DR: The photolysis of diazoindene and diazofluorene at 12K in N2 matrices containing O2 has been studied, using i.r. spectroscopy as discussed by the authors.
24 citations