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Synthesis, Characterization and Optical Properties of a Novel Si‐Containing σ‐π‐Conjugated Hyperbranched Polymer
Author(s) -
Kwak Giseop,
Masuda Toshio
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20020101)23:1<68::aid-marc68>3.0.co;2-z
Subject(s) - polymer , conjugated system , polymer chemistry , materials science , polymerization , absorption (acoustics) , composite material
The polymerization of bis(4‐ethynylphenyl)methylsilane catalyzed by RhI(PPh 3 ) 3 afforded a regio‐ and stereoregular hyperbranched polymer, hb ‐poly[(methylsilylene)bis(1,4‐phenylene‐ trans ‐vinylene)] (poly( 1 )), containing 95% trans ‐vinylene moieties. The weight loss of this polymer at 900°C in N 2 was 9%. Poly( 1 ) displayed an absorption due to π‐π* transition around 275 nm as a shoulder and a weak absorption around 330 nm due to π‐to‐σ charge transfer, which was hardly seen in the corresponding linear polymer.