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: A simple one-step synthesis of highly pure rubicene (2) from fluorenone (1) and magnesium with 24% yield is described and compared with other preparation procedures as discussed by the authors.
Abstract: Synthesis of Highly Pure Rubicene and Rubicene Derivatives
A simple one-step synthesis of highly pure rubicene (2) from fluorenone (1) and magnesium with 24% yield is described and compared with other preparation procedures. Mono- and disubstituted rubicene derivatives are prepared by electrophilic aromatic substitution.
17 citations
TL;DR: In this article, a systematic investigation on the bromine substituent position effects on the selfassembly of fluorenone derivatives 1-bromo-7-(pentadecyloxy)-fluorenone (1-BFC15) and 2-pentadecycloxy-7bromofluor...
Abstract: A systematic investigation on the bromine substituent position effects on the self-assembly of fluorenone derivatives 1-bromo-7-(pentadecyloxy)-fluorenone (1-BFC15), 2-(pentadecyloxy)-7-bromo-fluor...
17 citations
TL;DR: In this paper, the π→π* S-S absorption spectra of 9,10-phenanthrenequinone and 3-bromophenanthrene-quinone in solutions up to the vacuum were obtained.
Abstract: The π→π* S–S absorption spectra of 9,10-phenanthrenequinone and 3-bromophenanthrenequinone in solutions up to the vacuum. UV region were obtained. On the other hand, MO calculations of the π-electronic systems of these quinones were carried out by means of the P–P–P method. The π→π* absorption bands of these quinones were assigned on the basis of the calculated results. The blue-shift of the longest-wavelength π→π* band of phenanthrenequinone due to the bromine-atom substitution at its 3-position was observed. Similar facts are found in aromatic carbonyl compounds, fluorenone and acetophenone.
17 citations
TL;DR: In this paper, the role of tetrakis(triphenylphosphine)palladium(0), which is a metal catalyst of Suzuki coupling, in the degradation and optical properties of fluorene-based compounds was investigated.
Abstract: The stability of fluorene-based compounds and polymers, especially at the bridged C-9 position under photoirradiation and thermal treatment, has widely claimed attention. The emission of fluorenone formed by degradation of the 9-site is regarded as the origin of the low emission band at 2.2−2.3 eV in polyfluorene-based conjugated materials. We have the investigated role of tetrakis(triphenylphosphine)palladium(0), which is a metal catalyst of Suzuki coupling, in the degradation and optical properties of fluorene-based compounds. The results show that it can effectively catalyze the formation of fluorenone and quench the emission of polyfluorene and fluorenone.
17 citations
TL;DR: In this article, photo-initiated polymerization of MMA with indeno [1,2-b]thioxanthene-7,13-dione (TX-FN) was investigated in the presence and absence of a coinitiator (MDEA).
Abstract: Thioxanthonation of fluorenone resulted in a new visible light initiator namely, indeno [1,2-b]thioxanthene-7,13-dione (TX–FN). The detailed photophysical properties of the singlet and the triplet excited states of TX–FN are reported using steady-state absorption, fluorescence, and phosphorescence, as well as laser flash photolysis techniques. Photoinitiated polymerization of MMA with TX–FN and CQ has been investigated in the presence and absence of a co-initiator (MDEA). Additionally, Photo-DSC studies were performed both in mono- and multiacrylate systems with TX–FN and parent compounds TX and FN. The obtained results were compared for formulations consisting of CQ. At low initiator concentrations, the conversions were lower than those obtained with TX–FN. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015
17 citations