Copolymers containing electronically isolated indolyl fragments as materials for optoelectronics

Monomer and its copolymers containing electronically isolated indolyl fragments were synthesized by multi-step synthetic route. The materials were examined by various techniques including thermogravimetry, differential scanning calorimetry, UV and fluorescence spectrometry as well as electron photoemission technique. The copolymers exhibit initial mass loss temperatures in the range of 259-321 °C and form amorphous films with glass transition temperatures of 102-122 °C. Thin layers of the materials demonstrate ionization potentials of about 5.7 eV. The copolymers were tested as host materials in electro-phosphorescent devices.