Abstract
High-quality polycarbazole (PCZ) films were synthesized electrochemically by direct oxidation of carbazole in boron trifluoride diethyl etherate (BFEE) containing vol. 20% ethyl ether (EE). The oxidation potential of carbazole in this medium was measured to be only 0.90 V vs. SCE, which was lower than that determined in acetonitrile containing 0.1 mol l−1 Bu4NBF4 (1.35 V vs. SCE). PCZ films obtained from this medium showed better electrochemical behavior, better thermal stability with conductivity of 7.5 × 10−3 S cm−1 being one order of magnitude higher than those reported previously, indicating that BFEE/EE was a better medium than acetonitrile for the electrosyntheses of PCZ films. As-formed PCZ films can be partly dissolved in acetone, acetonitrile and tetrahydrofuran. Spectral analysis provided evidence for the existence of the conjugated structure of the PCZ chain. Fluorescent spectra indicate that electrosynthesized PCZ is an ideal blue light emitter.
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Acknowledgements
The authors acknowledge financial support from the Program for New Century Excellent Talents in University (No.NCET-04-0649), National Natural Science Foundation of China (No. 20275020) and the Project for Outstanding Scholar in Science of Qingdao (No. 05-2-JC-80)
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Nie, G., Xu, J., Zhang, S. et al. Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether. J Appl Electrochem 36, 937–944 (2006). https://doi.org/10.1007/s10800-006-9151-x
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DOI: https://doi.org/10.1007/s10800-006-9151-x