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Synthesis and light emitting properties of new polyquinolines with a pendent 4′‐octyloxybiphenyl group
Author(s) -
Kim Jong Lae,
Kim Jai Kyeong,
Cho Hyun Nam,
Kim Dong Young,
Hong Sung Il
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(20000401)201:7<768::aid-macp768>3.0.co;2-8
Subject(s) - luminescence , thermal decomposition , diode , light emitting diode , materials science , polymer , green light , electrochemistry , decomposition , polymer chemistry , oled , layer (electronics) , group (periodic table) , photochemistry , chemistry , optoelectronics , electrode , nanotechnology , blue light , organic chemistry , composite material
Two novel AA‐BB type polyquinolines with pendent 4′‐octyloxybiphenyl groups (P1, P2) were synthesized successfully by the Friedländer polyquinoline synthesis and their thermal, luminescent and electrochemical properties were investigated. These polymers were soluble in convenient solvents and thermally stable showing initial decomposition temperatures of >405°C. EL spectra of P1 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 P1 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.