1,3- und 4,10-Verknüpfte Pyrenylene: Grundkörper für konjugierte Polymere und polyaromatische Kohlenwasserstoffe

Abstract

In this dissertation a novel class of pyrene copolymers is presented. Thereby this novel class of polymers shows deep blue light emission as required for OLEDs and does not exhibit excimer or aggregate emission when processed in films. Moreover the optical properties of the compounds are found to be comparable to that of well-known blue emitting conjugated polymers and significantly enhanced compared to their neat homopolymers. OLEDs built in an improved device assembly show stable bright blue emission. A considerable efficiency enhancement can be demonstrated using new charge carrier layer in the device assembly. In the second part of this contribution 1,3 , 1,4 and 4,10 connected pyrenylene compounds are synthesized and cyclodehydrogenated to their corresponding polyaromatic hydrocarbons. Thereby the first synthesis of the macrocycle cyclohexa(1,3‐pyrenylene) is achieved in six steps starting with pyrene and leading to a non‐aggregating highly twisted blue‐light‐emitting material. As well this work subject bi- and terpyrenyls to selective fusion for formation of extended polycyclic aromatic hydrocarbons (PAHs). Connecting the pyrene units at 4-4′- or 1-4′-positions led to smooth formation of extended PAHs, achieved via cyclodehydrogenation. This is far more difficult if pyrene is coupled in the 1,1′-position.