K.R.J. Thomas, J.T. Lin, Y.-T. Tao and C.-H. Chuen
Version of Record online: 29 MAY 2002 | DOI: 10.1002/1521-4095(20020605)14:11<822::AID-ADMA822>3.0.CO;2-S
A new class of pure red fluorescent dyes, which are both emitting and hole-transporting, has been designed. Thieno-[3,4-b]-pyrazines, fully substituted with bulky aryl substituents (giving the molecules an overall star shape, see Figure), could be easily synthesized by condensation of 2,5-diaryl-3,4-diaminothiophenes with 1,2-diaryl-1,2-diketones. Their absorption bands are typically around 320–330 and 450–530 nm.