Synthesis, characterization, photoluminescent and electroluminescent properties of new conjugated 2,2 '-(arylenedivinylene)bis-8-substituted quinolines
Liang, FS; Chen, JS; Cheng, YX; Wang, LX; Ma, DG; Jing, XB; Wang, FS
| HERO ID | 3576559 |
|---|---|
| In Press | No |
| Year | 2003 |
| Title | Synthesis, characterization, photoluminescent and electroluminescent properties of new conjugated 2,2 '-(arylenedivinylene)bis-8-substituted quinolines |
| Authors | Liang, FS; Chen, JS; Cheng, YX; Wang, LX; Ma, DG; Jing, XB; Wang, FS |
| Journal | Journal of Materials Chemistry |
| Volume | 13 |
| Issue | 6 |
| Page Numbers | 1392-1399 |
| Abstract | A series of new PPV oligomers containing 8-substituted quinoline, 2,2'-(arylenedivinylene) bis-8-quinoline derivatives, were designed and synthesized via a Knoevenagel condensation reaction of quinaldine, 8-hydroxy-or 8-methoxy-quinaldine with aromatic dialdehydes. These PPV oligomers were characterized by H-1 and C-13-NMR, X-ray diffraction, elemental analysis, UV-visible and fluorescence spectroscopies. The X-ray diffraction investigation showed that there are intermolecular pi...pi interactions in the solid state in 1 and 3. The optical and photoluminescent properties study demonstrated that the emission color of the resulting materials varies from blue to yellow and is dependent on the substituents (pi-donor and pi-acceptor groups) on both sides of the conjugated molecules and the aromatic core in the middle of the conjugated backbones. The electroluminescent devices using compounds 1-4 as the emitters and electron-transporting layers were fabricated with the structure ITO/NPB/emitter/LiF/Al. The best device performance with the maximum brightness of 5530 cd m(-2) and the luminous efficiency of 2.4 cd A(-1) is achieved by using compound 4, with intramolecular charge transfer character, as the emitter; these values represent a more than 5-fold improvement in brightness and efficiency compared to compound 3 without methoxy groups on the phenyl rings. |
| Doi | 10.1039/b210408c |
| Wosid | WOS:000182997400027 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |