ORGANIC ELECTROLUMINESCENCE DEVICE AND HETEROCYCLIC COMPOUND FOR ORGANIC ELECTROLUMINESCENCE DEVICE
申请人:Samsung Display Co., Ltd.
公开号:US20190252626A1
公开(公告)日:2019-08-15
An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, a light emitting layer disposed on the hole transport region, an electron transport region disposed on the light emitting layer, and a second electrode disposed on the electron transport region. The light emitting layer includes a heterocyclic compound represented by Formula 1 below. In Formula 1, D
1
and D
2
are each independently represented by Formula 2 below, and A is represented by any one of Formulas 3-1 to 3-3 below.
D
1
-A-D
2
Formula 1
Organic electroluminescence device and heterocyclic compound for organic electroluminescence device
申请人:Samsung Display Co., Ltd.
公开号:US11362286B2
公开(公告)日:2022-06-14
An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, a light emitting layer disposed on the hole transport region, an electron transport region disposed on the light emitting layer, and a second electrode disposed on the electron transport region. The light emitting layer includes a heterocyclic compound represented by Formula 1 below. In Formula 1, D1 and D2 are each independently represented by Formula 2 below, and A is represented by any one of Formulas 3-1 to 3-3 below.
D1-A-D2 Formula 1
Electron transfer photoinduced cleavage of acetals. A mild preparation of alkyl radicals
作者:M. Mella、E. Fasani、A. Albini
DOI:10.1021/jo00037a020
日期:1992.5
Electron transfer from 2-alkyl- and 2,2-dialkyldioxolanes as well as from open-chain ketals to singlet excited benzene-1,2,4,5-tetracarbonitrile (TCNB) is followed by fragmentation of the donors radical cation to yield alkyl radicals and dialkoxy carbocations. The first species are trapped by TCNB to yield alkylbenzenetricarbonitriles (substitution of a second cyano group can be obtained sequentially) and in a minor path are reduced to alkanes, while the latter ones react with nucleophiles to give ortho acid derivatives. In view of the results of radical clock experiments, it is assumed that part of the process is a concerted (radical cation cleavage-addition to the aromatic) reaction, while another part involves the free-radical cation. On the other hand, intersystem crossing from the singlet radical ion pair to the triplet manifold causes cleavage of the acetal to the corresponding carbonyl derivative. This reaction offers a mild method for the preparation of alkyl radicals via C-C bond cleavage.
Homolytic Base-Promoted Aromatic Alkylations by Alkyl Halides<sup>1</sup>
作者:Chen Wang、Glen A. Russell、Walter S. Trahanovsky
DOI:10.1021/jo9818982
日期:1998.12.1
Electron-transfer chain reactions leading to regioselective alkylations of benzenes bearing electron-withdrawing substituents can be observed with alkyl halides in the presence of the radical initiator (Bu3Sn)(2) and the proton acceptor 1,4-diazabicyclo[2.2.2]octane (DABCO). Yields vary from low to high depending on the benzene derivatives. The role of DABCO is to abstract a proton from the substituted cyclohexadienyl adduct radical to form a radical anion which then transfers an electron to RX and is converted to the alkylated product itself. The rate of this electron-transfer step is probably not fast enough to sustain a good radical chain reaction so that further generation of R-. from excess (Bu3Sn)(2) and RX is necessary.
Homolytic Base-Promoted Aromatic Alkylations by Alkylmercury Halides<sup>1</sup>
作者:Glen A. Russell、Ping Chen、Byeong Hyo Kim、Ragine Rajaratnam
DOI:10.1021/ja971809n
日期:1997.9.1
Electron transfer chain reactions leading to substitution in electronegatively substituted benzene derivatives can be observed with alkylmercury halides in the presence of proton acceptors such as ...