1. σ-π Conjugated Organosilicon Hybrid Polymers from Copolymerization of a Tetrasiladiene and 1,4-Diethynylbenzene.
- Author
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Majumdar, Moumita, Bejan, Iulia, Huch, Volker, White, Andrew J. P., Whittell, George R., Schäfer, André, Manners, Ian, and Scheschkewitz, David
- Subjects
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ORGANOSILICON compounds , *COPOLYMERIZATION , *CONJUGATED polymers synthesis , *MONOMERS , *RING formation (Chemistry) - Abstract
A catalyst- and by-product-free protocol for the synthesis of σ-π conjugated organosilicon polymers is reported. The regiospecific [2+2] cycloaddition of CC triple bonds to SiSi double bonds allowed the preparation of air-stable ethynyl-terminated extended monomers from 1,4-bis(ethynyl)benzene and the para-phenylene bridged tetrasiladiene, Tip2SiSiTip- pC6H4-SiTipSiTip2 (Tip=2,4,6- iPr3C6H2). The polymer obtained from the extended monomer and further tetrasiladiene exhibits pronounced σ-π conjugation, as was evident from the red-shift in the absorption spectrum compared to model systems. We show that the thermal stability of the employed bis(alkyne) co-monomer is translated into this polymer. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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