Design of polymerizable phosphorescent iridium(III) complexes

POLY 428

Christoph Ulbricht, c.ulbricht@tue.nl1, Nina Rehmann2, Elisabeth Holder3, Klaus Meerholz, klaus.meerholz@uni-koeln.de4, and Ulrich S. Schubert, u.s.schubert@tue.nl1. (1) Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology and Dutch Polymer Institute (DPI), P.O. Box 513, Eindhoven, 5600 MB, Netherlands, (2) Institute of Physical Chemistry, University of Cologne, Luxemburgerstrasse 116, Cologne, D-50939, Germany, (3) Functional Polymers Group and Institute of Polymer Technology, University of Wuppertal, Gaußstrasse 20, Wuppertal, D-42119, Germany, (4) Institut für Physikalische Chemie, University of Cologne, Luxemburgerstrasse 116, Cologne, D-50939, Germany
Nuyken and Meerholz developed a concept to fabricate efficient multi-layer devices from solutions, applying oxetane-equipped materials. After deposition from solution the molecules, bearing multiple oxetane units, can be crosslinked by cationic ring opening polymerization (CROP) applying a photo-acid as initiator. In this contribution, we describe the first attempts to extend the oxetane-approach to the preparation of phosphorescent layers. The synthesis, the investigation and first applicability tests of new oxetane-bearing Ir(III)-complexes, showing green and orange-red emission, respectively, are presented. The orange emitter could be incorporated within a cross-linkable matrix. For comparative testing, model complexes without a polymerizable moiety were synthesized as well.