Silylene-Spaced Copolymers Containing Alternating Three-Block Divinyl Arylene Groups: Synthesis and Photophysics
Date Issued
2006
Date
2006
Author(s)
Chen, Shih-Hsien
DOI
zh-TW
Abstract
A series of silylene-spaced copolymers containing alternating aryl groups [(donor)n-SiMe2-(acceptor-1)m-SiMe2-(acceptor-2)-SiMe2] were synthesized by rhodium-catalyzed hydrosilylation of bis-alkynes with bis-silylhydrides. Bis-silylhydrides were prepared by nickel-catalyzed olefination of the corresponding aryl bisdithioacetals with Grignard reagent (Me2(iPrO)SiCH2MgCl) followed by LiAlH4 reduction. Bis-alkynes were obtained by Sonogashira reaction. This strategy provided a powerful arsenal to construct a regioselective polymeric backbone containing several chromophores with desired ratios of donors and acceptors. In these three-chromophore system, biphenyl was used as an energy donor; stilbene as the first acceptor and terphenylenedivinylene as the second acceptor. The silylene group was an insulating spacer as well as a linker among chromophores. The photophysical properties were also examined in details.
Subjects
矽烷基
矽
能量轉移
silylen-spaced
silicon
energy transfer
Type
thesis
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