AI Article Synopsis
- A new method for creating organosilicon polymers that doesn’t use catalysts or generate by-products has been developed.
- The process involves a specific reaction between C≡C triple bonds and Si=Si double bonds, resulting in stable ethynyl-terminated monomers.
- The resulting polymer shows a significant σ-π conjugation, indicated by a noticeable change in its absorption spectrum and exhibits excellent thermal stability due to the properties of the starting materials used.
Article 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 C≡C triple bonds to Si=Si double bonds allowed the preparation of air-stable ethynyl-terminated extended monomers from 1,4-bis(ethynyl)benzene and the para-phenylene bridged tetrasiladiene, Tip2 Si=SiTip-pC6H4-SiTip=SiTip2 (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.
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| http://dx.doi.org/10.1002/chem.201403494 | DOI Listing |
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