Ytterbium and Europium Complexes with Naphtho[1,2]thiazole-2-carboxylic and Naphtho[2,1]thiazole-2-carboxylic Acid Anions for Organic Light-Emitting Diodes (OLED)

An approach to the directed synthesis of aromatic lanthanide carboxylates as promising candidates for various luminescent applications, first of all, as emitting layers in light-emitting diodes, by varying the conjugation length with the introduction of a heteroatom and a neutral ligand was proposed. This approach enabled the synthesis of new europium and ytterbium complexes with naphtho[1,2]thiazole-2-carboxylic and naphtho[2,1]thiazole-2-carboxylic acid anions, which were successfully used in light-emitting diodes.