Synthesis, photo- and electroluminescent properties of norbornene based platinum-containing copolymers

Norbornene based monomers containing the 2-phenylpyridinato–N,C2′ platinum(II) complex bonded by acetylacetonate or pyrazolonate anchor groups were synthesized and copolymerized with a carbazole-containing norbornene comonomer by ring-opening metathesis polymerization (ROMP). The photo- and electroluminescence spectra of the resulting Pt-copolymers are similar. They consist of broad bands with maxima at 495, 530 and 565 nm which arise from the mixed ligand centered (LC) and metal to ligand charge transfer (MLCT) transitions. The copolymer with the cyclometalated platinum(II) complex bonded to the polymer chain via the pyrazolonate anchor group revealed the highest brightness of electroluminescence (260 cd/m2 at 21 V).

► Pt-containing copolymers were synthesized by ROMP of norbornene based monomers.
► Photo- and electroluminescence properties of the copolymers were investigated.
► The max electroluminance of 260 cd/m2 at 21 V was achieved.