474115-76-9Relevant articles and documents
Synthesis, characterization and photophysical processes of fluorene derivative containing naphthalene nucleus
Feng, Liheng,Chen, Zhaobin
, p. 2505 - 2509 (2005)
A novel luminescent compound, 9,9-bis[4′-(β-naphthyl-methacrylate)phenyl]fluorene (F-NMAP) is synthesized by Heck reaction of β-naphthyl methacrylic ester (NMAE) and 9,9-bis(4′-iodophenyl)-fluorene (BIPF). The structure is characterized by MS, 1H NMR, IR, and UV-vis spectroscopy. The photophysical processes of F-NMAP have been carefully investigated by UV-vis absorption and fluorescence spectra. The results show that the compound emits blue and blue-violet light. The luminescence quantum yield is 0.652 in ethanol and the emission spectra exhibit obvious solvent effect. With the increase in polarity of solvents, the fluorescence spectra change obviously and appear blue shift at room temperature. The light emitting can be quenched by both electron donor, N,N-dimethylaniline (DMA), and electron acceptor, dimethylterephthalate (DMTP). On adding gradually, DMA or DMTP into the solution of F-NMAP, the emission intensities of fluorescence are unusually increased. But when the concentration of DMA or DMTP goes beyond a certain scope, the emission intensities of fluorescence are gradually decreased. Simultaneously, the maximum emission peaks of F-NMAP-added DMA are blue-shifted and the maximum emission peaks of F-NMAP-added DMTP are red-shifted, respectively. Moreover, interactions between F-NMAP and fullerene (C60), or carbon nanotubes (CNTs) are also studied by fluorescent quenching where the processes follow the Stern-Volmer equation.
Photophysical processes of a fluorene derivative containing 1,3,4-oxadiazole
Feng, Liheng,Chen, Zhaobin,Bai, Fenglian
, p. 3029 - 3032 (2004)
The photophysical processes of 9,9-bis{4′-[2″-phenyl-5″- (3″′-(methacryl-amido)phenyl)]-1″,3″, 4″-oxadiazolylphenyl}fluorene (F-MAOP) formed by Heck reaction of 9,9-bis(4′-iodophenyl)fluorene (F-IP) and 2-phenyl-5-[3′- (methacrylamido)phenyl]-1,3,4-oxadiazole (OXD) have been carefully studied. The results show that the compound emits blue and blue-violet light and the emission spectra exhibit obvious solvent effect. With the increase of polarity of solvents, the fluorescence spectra change obviously and appear blue shift at room temperature. In addition, the light-emitting can be quenched by both electron donor (N,N-dimethylaniline, DMA) and electron acceptor (C 60). When N,N-dimethylaniline is gradually added into the solution of F-MAOP, the emission intensities of fluorescence are unusually increased. But when the concentration of DMA beyond a certain scope, the emission intensities of fluorescence are gradually decreased. The dimolecular exciplex between F-MAOP and C60 are formed and the quenching effect follows the Stern-Volmer equation. Moreover, interaction between F-MAOP and carbon nanotubes (CNTs) is also studied by fluorescent quenching.
HOST MATERIAL FOR LIGHT-EMITTING DIODES
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Page/Page column 22, (2010/04/30)
The present invention relates to a host material comprising a compound having two carbazole moieties which is suitable for blue-emitting OLEDs. Surprisingly, it has been found that when appropriate substituents are present in the carbazole structure, the solubility of the compounds can be improved without any adverse effect on the OLED performance. The present invention further relates to the use of the host materials and to an organic light emitting device comprising the host material.
