Postfunctionalization of Alkyne-Linked Conjugated Carbazole Polymer by Thermal Addition Reaction of TetracyanoethyleneReportar como inadecuado


Postfunctionalization of Alkyne-Linked Conjugated Carbazole Polymer by Thermal Addition Reaction of Tetracyanoethylene


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1

Global Edge Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan

2

PRESTO, Japan Science and Technology Agency JST, 4-1-8 Honcho, Kawaguchi, Saitama, Japan

3

Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan





*

Author to whom correspondence should be addressed.



Abstract The postfunctionalization of the main chain alkyne moieties of carbazole containing polyarylenebutadiynylenes was attempted by using a high yielding addition reaction between electron rich alkynes and a strong acceptor molecule, tetracyanoethylene TCNE. After successful postfunctionalization, the polymer band gap decreased due to the intramolecular donor-acceptor interactions. The resulting donor-acceptor alternating polymer showed a very broad charge-transfer band in the visible region as well as redox activities in both anodic and cathodic directions. The optical band gap showed good agreement with the electrochemical band gap. Furthermore, the thermal stability was enhanced after postfunctionalization. These features of the donor-acceptor alternating polymer are expected to be useful for high performance activities in organic solar cell applications. View Full-Text

Keywords: addition reaction; charge-transfer band; conjugated polymer; electrochemistry; postfunctionalization addition reaction; charge-transfer band; conjugated polymer; electrochemistry; postfunctionalization





Autor: Tsuyoshi Michinobu 1,2,* and Hiroyuki Fujita 3

Fuente: http://mdpi.com/



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