Electrochemical characterization of thin films based on new silicon-containing aromatic poly(1, 3, 4-oxadiazole)s

✍ Scribed by Burkhard Schulz; Silvia Janietz; Ion Sava; Maria Bruma

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 340 KB
• Volume: 7
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199605)7:5/6<514::aid-pat538>3.0.co;2-9

✦ Synopsis

The electrochemical behavior of new silicon-containing poly (l,3,4-oxadiazole)s is described. These polymers contain tetraphenyl silane units in the main chain and are easily soluble in common organic solvents like chloroform or benzene. Thin transparent films based on the new silicon-containing poly(a ylene-1 J,Coxadiazole)s were prepared by using the spin-coating technique or the dipping method. These polymers can be electrochemically reduced and form stable radical anions. The reduction process is reversible. The reduction potential depends on the molecular structure of the macromolecule and the ability of the aromatic units to stabilize the radical anion by n- electron conjugation. The investigated polymers cannot be electrochemically p-doped. The radical cations formed in the oxidation process are unstable and the polymers are decomposed. The ability to form stable radical anions makes the new silicon-containing poly(a rylene-l,3,4-oxadiazo1e)s candidates for electron conducting layers in light-emitting diodes.