Synthesis and light emitting properties of new polyquinolines with a pendent 4 '-octyloxybiphenyl group

Abstract

Two novel AA-BB type polyquinolines with pendent 4'-oclyloxybiphenyl groups (P1, P2) were synthesized successfully by the Friedlander polyquinoline synthesis and their thermal, luminescent and electrochemical properties were: investigated. These polymers wsre soluble in convenient solvents and thermally stable showing initial decomposition temperatures of >405 degrees C. EL spectra of PI and P2 lie in the green region (530 nm) and yellow region (574, 470 nm), respectively. The turn on voltages of the diodes (ITO/polyquinoline/Al) were 19 V for PI and 9 V for P2. The quantum efficiencies of these LEDs, with each polymer as the emissive layer, were 0.0076% and 0.0011% photons per electron, respectively.