Aryl Proton Transfer Reactions of 9-Arylanthracene and 9-Substituted Anthracene Radical Cations with 2,6-Di-tert-butylpyridine
摘要:
Radical cations of anthracenes with substituents at the O-position (Br, CN, or NO2) or those of 9-arylanthracenes were observed to undergo proton transfer reactions with 2,6-di-tert-butylpyridine (TBP) to generate the corresponding anthracenyl radical. Under the same conditions 2,6-dimethylpyridine (LUT) undergoes combination reactions with the radical cations, and the proton transfer reactions could not be detected. The characteristic features of the reactions producing the anthracenyl radicals are as follows: (a) primary deuterium kinetic isotope effects are observed on substitution of the 10-H with 10-D, (b) the apparent Arrhenius activation energies vary from -2 to -11 kcal/mol, and (c) 10-Br-substituted anthracenes are formed during bromine atom abstraction from bromoform by the free radicals. The intermediate bromo derivatives are further oxidized under the reaction conditions. A two-step mechanism involving a reversible pi-complex formation followed by rate-determining proton transfer is proposed. The results of the reactions with TBP are compared to those obtained from the corresponding reactions of the radical cations with LUT.
Novel aromatic compound and organic electroluminescent element containing the same
申请人:Ikeda Hidetsugu
公开号:US20050214565A1
公开(公告)日:2005-09-29
A novel aromatic compound having an anthracene skeleton structure and an asymmetric molecular structure; and an organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer containing a light emitting layer and sandwiched between the cathode and the anode in which at least one layer in the organic thin film layer contains the above novel aromatic compound singly or as a component of a mixture. The organic electroluminescence device exhibits a great luminance of emitted light, a great efficiency of light emission and a high purity of color, emits bluish light, is excellent in stability at high temperatures and has a long life. The organic electroluminescence device can be provided by utilizing the novel aromatic compound.
NOVEL AROMATIC COMPOUND AND ORGANIC ELECTROLUMINESCNET ELEMENT CONTAINING THE SAME
申请人:IDEMITSU KOSAN CO., LTD.
公开号:EP1496041A1
公开(公告)日:2005-01-12
A novel aromatic compound having an anthracene skeleton structure and an asymmetric molecular structure; and an organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer containing a light emitting layer and sandwiched between the cathode and the anode in which at least one layer in the organic thin film layer contains the above novel aromatic compound singly or as a component of a mixture. The organic electroluminescence device exhibits a great luminance of emitted light, a great efficiency of light emission and a high purity of color, emits bluish light, is excellent in stability at high temperatures and has a long life. The organic electroluminescence device can be provided by utilizing the novel aromatic compound.