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 authors compared addition (Add.) vs reduction (Red.) products in the reactions of substituted benzophenones, acetophenone and fluorenone with "EtMgBr" in diethyl ether, 1,2-dimethoxyethane and tetrahydrofuran.
16 citations
TL;DR: In this article, the electrochemical properties of poly(2,7-fluoren-9-one)-alt poly(5,5′-(3,3′-di-n-octyl-2,2′-bithiophene))] copolymer were characterized by a combination of cyclic voltammetry and electrochemical impedance spectroscopic (EIS) investigations.
16 citations
Patent•
25 Jan 2000
TL;DR: In this article, a 9, 9 bis(an alkyl-substituted-4-hydroxyphenyl)fluorene is obtained by reacting 1 pt.mol 9-fluorenone with 4-8 pts.C.% based on a reaction solvent (e.g., methanol).
Abstract: PROBLEM TO BE SOLVED: To obtain the subject new compound useful as a raw material of a highly heat resistant and highly transparent polyester resin, polyether resin, polyimide resin and epoxy resin and as a raw material of an optical material having a large refractive index and transparency, or the like. SOLUTION: This 9, 9 bis(an alkyl-substituted-4-hydroxyphenyl)fluorene is a compound of formula I [R1 is H or methyl; R2 is a 2-4C alkyl, 5C or 6C cycloalkyl or the like; (n) is 1, 2], e.g. 9,9-bis(4-hydroxy-3-isopropylphenyl) fluorene. The compound of formula I is obtained by reacting 1 pt.mol 9- fluorenone with preferably 4-8 pts.mol alkylphenols of formula II (e.g.; o- isopropylphnol) in the presence of an acid catalyst (e.g.; hydrogen chloride gas or a conc. hydrogen chloride), by preferably simultaneously using an alkylmercaptane, and preferably using a reaction solvent (e.g.; methanol) at 20-80 deg.C. The alkylmercaptane is used 3-20 mol.% based on the 9-fluorenone.
16 citations
TL;DR: In this paper, a mechanism for Meerwein-Pondorf-Verley-type reductions is proposed, invoking single electron as well as 1,2-hydrogen shift steps.
16 citations
TL;DR: In this paper, the effects of fluorene-ethylene (FE) spacers on photo-physical properties of conjugated oligomers were compared. And the authors showed that the difference between donor-dependent excited state lifetimes of oligomers becomes less obvious after the introduction of FE units, but the difference in two-photon characteristics between oligomers with different donors is also decreased.
16 citations