Abstract
The design of luminescent transition metal complexes is of steady interest among researchers due to the possibility of their use in organic light-emitting diodes (OLED). The electron injection and charge transfer characteristics in phosphors used in the emission layer can be improved by introducing special functional groups. The diphenylphosphoryl group (Ph2P=O) is an attractive candidate for modifying the ligand environment of the complex , , owing to its ability to improve electron transport properties of the phosphor. In this work, organic compounds based on 2,2’-bipyridine were synthesized, carrying diphenylphosphoryl groups in various positions (Fig. 1). 2,2'-bipyridine is a convenient function for metal coordination, and such a design of objects is due to their further use as ligands for transition metal complexes. Based on this new family of ligands, iridium(III) and copper(I) complexes were obtained as potential candidates for use in OLED devices. These compounds were fully characterized by various physico-chemical methods of analysis. The photophysical characteristics of the obtained organic and organometallic objects were also studied.