Electrochemical syntheses of photoluminescent polymers
from thienylene-poly(phenylenevinylene) derivatives (in English)
Polimery 2008, No 2, 99
Two compounds, 1,4-bis-(2(Z)-thienylenevinylene)-benzene (M1) and 1,4-bis-(2(Z)-thienylenevinylene)-2,5-dimethoxybenzene (M2) were synthesized and characterized using spectroscopic and electrochemical methods. Spectroscopic and photoluminescent properties of these compounds were found to be evidently dependent on their structure. Both M1 and M2 can be oxidized electrochemically producing forms of higher molecular weight. Intermediate products, which include stable oligomeric forms, were distinguished using spectroscopy during polymerization. In the final stage, oxidation of the oligomers at the electrode surface led to homogeneous, well adhering polymer films. The doping process of these polymers that also reflects their structure is discussed. Generally, polarons produced during oxidation do not undergo a process of recombination to bipolarons due to the block structure. Both polymers studied have photoluminescent properties. Effects of structure on the observed phenomena and parameters, like the wavelength position, the half width of the peak maximum are demonstrated and discussed.
Key words: conjugated polymers, electrochemistry, conducting polymers, thienylenevinylene-benzene
Electrochemical syntheses of photoluminescent polymers from thienylene-poly(phenylenevinylene) derivatives (in English)