ethynyl]phenols produces indene/benzofuran-fused alcohols. A moderate asymmetric induction is observed when chiral diphosphine ligands are used for rhodium. Indene/indole-fused compounds are synthesized by a similar reaction of [(2-acetylphenyl)ethynyl]anilines. The domino-type 5-endo/5-exo cyclization reaction is extended to substrates havingtwo phenolic hydroxygroups. A linearly-fused array of five- and six-membered
designed an ambipolarmaterial, 3,7‐bis[4‐(N‐carbazolyl)‐phenyl]‐2,6‐diphenylbenzo[1,2‐b:4,5‐b′]difuran (CZBDF), and synthesized it by zinc‐mediated double cyclization. Its physical properties clarified that CZBDF possesses a wide‐gap character, well‐balanced and high hole and electron mobilities of larger than 10−3 cm2 V−1 s−1, and a high thermal stability. Using CZBDF as a hostmaterial for heterojunction
我们设计了一种双极性材料3,7-双[4-(N-咔唑基)-苯基] -2,6-二苯并苯并[1,2- b:4,5- b ']二呋喃(CZBDF),并进行了合成它是通过锌介导的双环化。它的物理性质表明,CZBDF具有宽的间隙特性,良好的平衡和高的空穴迁移率和电子迁移率,其迁移率大于10 -3 cm 2 V -1 s -1,并且具有很高的热稳定性。使用CZBDF作为异质结OLED器件的主体材料,可以获得全范围的可见光发射。值得注意的是,CZBDF还使我们能够制造出发射RGB的同质结OLED,其性能可与由多种材料组成的异质结器件相媲美或更高。
A fluorescent bicyclic calix[4]arene–oxacyclophane with planar chirality: resolution, chiroptical properties, and absolute configuration
作者:José V. Prata、Alexandra I. Costa、Gennaro Pescitelli、Carlos M. Teixeira
DOI:10.1016/j.tetasy.2014.02.012
日期:2014.4
A new inherentlychiral calix[4]arene ICC 1 has been disclosed. The dissymmetry of 1 is generated from a chirality plane in the quinol moiety of a 1,3-bridged bicyclic calix[4]arene. ICC 1 has been resolved by enantioselective HPLC, and the chiropticalproperties of both isolated antipodes (pS)-1 and (pR)-1 confirm their enantiomeric nature. The absolute configuration of the (pS)-1/(pR)-1 enantiomeric
A new zinc-based annulation method produced regioselectively a variety of 2,3,6,7-tetraarylbenzo[1,2-b :4,5-b ']difurans in good yields. The organic electroluminescent devices using these tetraarylbenzodifurans as hole-transporting materials showed better performance than those using alpha-NPD, the current standard HTM. The hole drift mobility and the glass-transition temperatures of the tetraarylbenzodifurans were also found to be better than those of alpha-NPD.