Synthesis and spectroscopic investigation of π‐conjugated (E)‐enyne polycarbazole with different organo‐metallic catalysts from 3,6‐diethynyl‐9‐(2‐ethylhexyl)carbazole |
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| Authors: | In Kyu Moon Masuki Kawamoto Tatsuo Wada |
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| Institution: | 1. Environment and Energy Division, KITECH (Korea Institute of Industrial Technology), Chungnam 330‐825, Korea;2. Supramolecular Science Laboratory, RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351‐0198, Japan |
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| Abstract: | In the present study, a new (E)‐rich‐enyne π‐conjugated polymer containing a carbazole was designed and synthesized. Two different synthesis methods of polyN‐(2‐ethylhexyl)‐3,6‐carbazolyleneethynylene‐(E)‐vinylene] (PCZEV) have been prepared from 3,6‐diethynyl‐9(2‐ethylhexyl)carbazole by using the palladium‐carbene‐catalyzed reaction and/or by using the organolanthanide‐catalyzed reaction leading to well‐defined polymer, and their general properties were studied. Compared to polyN‐(2‐ethylhexyl)‐3,6‐carbazolyleneethynylene] (PCE), the UV‐vis absorption and photoluminescence of the PCZEV was red‐shifted, which indicates the extension of conjugation length. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2434–2442, 2009 |
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| Keywords: | conjugated polymers fluorescence heteroatom‐containing polymers light‐emitting diodes (LED) metal‐organic catalysts/organometallic catalysts |
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