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.

Solution versus solid-state electropolymerization of regioregular conjugated fluorenone-thienylene vinylene macromonomers - voltammetric and spectroelectrochemical investigations

Abstract: We present detailed voltammetric and spectroelectrochemical studies of poly(2,7-bis(5-[(E)-1,2-bis(3-octylthien-2-yl)ethylene])-fluoren-9-one) (PTVF)—a conjugated polymer consisting of thienylene, vinylene, and fluorenone subunits. PTVF can be easily obtained either by electropolymerization of its monomer ((2,7-bis(5-[(E)-1,2-bis(3-octylthien-2-yl)ethylene])-fluoren-9-one) [TVF]) dissolved in the electrolytic solution or via solid-state electropolymerization of a thin film of the monomer deposited on the electrode. UV-vis-NIR spectroscopic data indicate that the latter method leads to a polymer of a smaller degree of polymerization (DP). The possibility of the formation of a polymeric conductor on a transparent conductive substrate such as indium tin oxide, in situ, via solid-state electropolymerization, combined with its postpolymerization transformation into an organic semiconductor by electrochemical dedoping, is technologically very attractive and makes TVF and its polymer very promising materials for applications in organic electronics.

Morphology and Optical Properties of Fluorene-Based Ladder-type Poly(para-phenylenes): Origin of Low-Energy Emission

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 real chromophore group of low-energy emission in fluorene-based compounds and polymers is debatable for fluorenone, and the aggregate is difficult to distinguish. We report the morphology and optical properties of two fluorene-based ladder-type poly(p-phenylene)s (LPFs) with the target to explore the real chromophore group of low-energy emission. The basic comparison of LPFs with different substitutions and degraded degree testify the low-energy emission is relating to oxidized products but not packing order. The molecular distance is then adjusted by doping degraded LPF into an inert matrix, which shows that the low-energy emission is as strong as in bulk when the average molecular distance is larger than 1.2 nm. These results suggest fluorenone is the chromophore group of low-energy emission and rule out aggregate, especially fluor...

Solvent effects of photoinduced electron transfer reactions of triplet fluorenone with amines

Abstract: The property of the lowest excited triplet state of fluorenone (FL) in acetonitrile, ethyl acetate, toluene, cyclohexane has been investigated using time-resolved laser flash photolysis. The appearances of the corresponding cation radicals and anion radicals suggest that the electron transfer reaction occurs between 3FL* and amines. Experimental results show a decrease in the quenching rate constants along with reducing solvent polarity. The change of quenching rate constants of the FL excited triplet with the three N,N-dimethylaniline derivatives are explained using the Hammett constant.