Hyperbranched polyarylenes from copolycyclotrimerization

Cheng Lin, Peng Han, Luo Jing-dong, Jacky W Y L , Tang Ben-zhong

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

High molecular weight hyperbranched polyarylenes were synthesized in high yields by one-pot copolycyclotrimerizations of 2,5-diethynylthiophene (1), 4,4′ -biphenyldiyne (2) and 2,7-diethynylfluorenes (3) with 1-heptyne (4) and 1-dodecyne (5) using TaCl5 · Ph4Sn catalysts in toluene. The structures and properties of the polymers were characterized and evaluated by IR, NMR, TGA, UV, fluorescence and optical limiting analyses. All the polymers possess high thermal stability and emit strong blue light upon UV irradiation, whose intensities are higher than that from poly (1-phenyl-1-octyne) (PPO), a well-known highly luminescent disubstituted polyacetylene. Little aggregation-induced red shift in the photoluminescence is observed in the thin films of the polymers.
Original languageEnglish
Pages (from-to)86-89
JournalJournal Wuhan University of Technology, Materials Science Edition
Volume17
Issue number2
DOIs
Publication statusPublished - Jun 2002
Externally publishedYes

Research Keywords

  • Hyperbranched polyarylenes
  • Light emission
  • Light limiting
  • Synthesis

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