Synthesis and characterization of two different azarubrenes
作者:Gaozhan Xie、Sebastian Hahn、Frank Rominger、Jan Freudenberg、Uwe H. F. Bunz
DOI:10.1039/c8cc01662c
日期:——
The synthesis, properties and solid state X-ray single crystal structures of two new rubrene-derivatives, viz diazarubrene (4,4′-(6,12-diphenyltetracene-5,11-diyl)dipyridine) and tetraazarubrene (5,6,11,12-tetra(pyridin-4-yl)tetracene), are reported. Both the azarubrenes are more oxidatively stable than rubrene itself and show very similar optical properties but differ in their crystal packing from
Low temperature Kumada–Corriu cross-coupling of polychlorinated acene derivatives and a synthesis of sterically demanding acenes
作者:Elisey Yagodkin、Christopher J. Douglas
DOI:10.1016/j.tetlet.2010.03.121
日期:2010.6
linear acenes for organic materials applications. Treatment of polychlorinated acenes with the PEPPSI-IPr catalyst and MeMgBr undergo 6–8 concurrent coupling reactions to yield products such as octamethylnaphthalene, which is distorted out of planarity due to the steric interaction between the methyl groups. More sterically demanding Grignard reagents such as PhMgBr coupled cleanly with 9,10-dichloroanthracene
New rubrene analogues, which are heteroaryl-tetrasubstituted tetracenes, have been developed using a simplified synthesis approach. Their stabilities in solution were improved compared to those of rubrene. The correlation among the molecular structures, crystal structures, and charge transport properties has been investigated and compared with rubrene and various rubrene analogues. Although twisted
Process for the preparation of peri-dichalcogeno polycyclic aromatic
申请人:Ciba-Geigy Corporation
公开号:US05284942A1
公开(公告)日:1994-02-08
A process for the preparation of peri-dichalcogeno polycyclic aromatic compounds by preparing in a first step, in an amidic solvent, an alkali metal sulfide, selenide or telluride which, in a second step, is reacted with a peri-halogeno aromatic compound, which process comprises reacting in said first step an alkali metal base with elemental sulfur, selenium or tellurium at elevated temperature.