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Synthesis and Spectral Properties of Novel Poly(disubstituted acetylene)s

✍ Scribed by Zuzana Duchoslavová; Radoslava Sivkova; Vladimíra Hanková; Jan Sedláček; Jan Svoboda; Jiří Vohlídal; Jiří Zedník

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
377 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The synthesis of mostly new acetylenes, R~1~CCR~2~, (R~1~ = 4‐t‐butylphenyl; R~2~ = 4‐t‐butylphenyl; 4‐[(t‐butyl)(diphenyl)silyloxy]phenyl; 1‐naphthyl; 2‐naphthyl; 9‐anthryl) is reported. Their UV‐vis characteristics are discussed in comparison to the results of TD‐DFT calculations. R~1~CCR~2~ (except for R~2~ = 9‐anthryl) give polyacetylenic polymers—[C(R~1~) = C(R~2~)]‐~n~, insoluble if R~1~ = R~2~ and well soluble if R~1~ ≠ R~2~ in polymerization with TaCl~5~/SnBu~4~. Polymerizability increases with increasing monomer triple bond accessibility for the catalyst. The photoluminescence yield of the soluble polymers rises in the R~2~ order: 1‐naphthyl < 2‐naphthyl < 4‐[(t‐butyl)(diphenyl)silyloxy]phenyl. magnified image

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