474115-76-9

Upstream product

• 15499-84-0 9,9-bis(4-aminophenyl)fluorene 

Downstream Products

• 174141-92-5 4',4''-bis[bis(4-biphenylyl)amino]-9,9-diphenylfluorene 
• 1226876-07-8 9-[4-(carbazol-9-yl)phenyl]-9-(4-iodophenyl)-9H-fluorene 
• 954497-15-5 9,9-bis[4-(3,6-di-tert-butyl-9-carbazolyl)phenyl]fluorene 
• 954497-17-7 9,9-bis(4-iodophenyl)-2,7-di-tert-butylfluorene 

Relevant academic research and scientific papers

Synthesis, characterization and photophysical processes of fluorene derivative containing naphthalene nucleus

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.

Novel blue exciplex comprising acridine and sulfone derivatives as a host material for high-efficiency blue phosphorescent OLEDs

Awide-energy-gap exciplex comprising bis[4-(9,9-dimethyl- 9,10-dihydroacridine-10-yl)phenyl]diphenylsilane (SiDMAC) and 9,9-bis[4-(phenylsulfonyl)phenyl]fluorene (BPSPF) was developed as a host material for blue phosphorescent organic light-emitting devices (OLEDs). Using a combination of this exciplex as a host material and blue phosphorescent emitter iridium(III) bis[(2′,6′-difluoro-2,3′-bipyridinato-N,C4′)]acetylacetonate [(dfpypy)2Ir(acac)], we developed OLEDs that realized a low driving voltage of 3V and a high power efficiency (νp) of 32 lmW-1 at 100 cdm-2.

Photophysical processes of a fluorene derivative containing 1,3,4-oxadiazole

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.

Photophysical processes of a fluorene derivative containing carbazole unit

The photoluminescence properties of 9,9-bis[4′-(9″-carbazovinylene)phenyl]fluorene (F-CZV) formed by Heck reaction of 9,9-bis(4′-iodophenyl)fluorene (F-IP) and N-vinylcarbazole have been carefully studied. The results show that the compound emits blue light and the dimolecular excimer is formed with gradual increase in concentration of F-CZV. The results also indicate the interaction between F-CZV and electron donors (N,N-dimethylaniline) or electron acceptors (dimethylterephthalate, fullerene carbon nanotubes) can be efficiently generated where the processes follow the Stern-Volmer equation. Moreover, when dimethylterephthalate (DMTP) or carbon nanotubes (CNTs) is gradually added into the solution of F-CZV, the emission intensities of fluorescence are unusually increased. But when concentration of dimethylterephthalate or carbon nanotubes beyond a certain scope, the emission intensities of fluorescence are gradually decreased.

HOST MATERIAL FOR LIGHT-EMITTING DIODES

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.

Novel fluorene/carbazole hybrids with steric bulk as host materials for blue organic electrophosphorescent devices

The problem of self-quenching in organic electrophosphorescence devices has been extensively studied and partially solved by using sterically hindered spacers in phosphorescent dopants. This paper attempts to address this problem by using sterically hindered host materials. Novel fluorene/carbazole hybrids with tert-butyl substitutions, namely 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl]fluorene (TBCPF) and 9,9-bis[4-(carbazol-9-yl)phenyl]-2,7-di-tert-butylfluorene (CPTBF), have been synthesized and characterized. The compounds exhibit not only high triplet energy (>2.8 eV), but also high glass transition temperature (>160 °C) and thermal stability. The substitution of inert tert-butyl groups to the carbazole/fluorene rings of these host molecules has a remarkable effect on the corresponding properties of the host materials, i.e. enhancing the thermal and electrochemical stability, weakening the intermolecular packing, and tuning the solid-state emission. Blue electrophosphorescent devices with enhanced performance were prepared by utilizing the sterically hindered host materials. The devices based on the four tert-butyl substituted material TBCPF exhibit unusual tolerance of high dopant concentration up to 20% and marked reduction of efficiency roll-off at higher current, indicating significant suppression of self-quenching effect in organic electrophosphorescent devices by the substitution of steric bulks.