Metal-Free Synthesis of Poly(silyl ether)s

  • Author: ChemistryViews.org
  • Published: 24 February 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Macromolecules/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Metal-Free Synthesis of Poly(silyl ether)s

Poly(silyl ether)s (PSEs) are flexible and thermally stable high-performance materials. Existing methods for PSE synthesis either produce large amounts of byproducts or suffer from limited availability of the starting materials. The addition of silicon hydrides across unsaturated bonds could be a promising alternative, but usually requires transition-metal catalysts.


Shaoguang Li, University of California, Santa Barbara, USA, and China University of Geosciences, Wuhan, Craig J. Hawker, University of California, Santa Barbara, and colleagues have developed a protocol for the polymerization of α-diketone and bis(silane) monomers under ambient conditions via a metal-free hydrosilylation catalyzed by tris(pentafluorophenyl)borane (B(C6F5)3). The team reacted a series of readily available α-diketone and bis(silane) derivatives in the presence of 0.5 mol% B(C6F5)3 in chloroform to give the desired PSEs (pictured).


According to the researchers, the Lewis acid B(C6F5)3 activates the Si–H bond via η-coordination and promotes its addition to the ketone's C=O bond. The thermal stability of the obtained polymers can be tuned by varying the monomers. The material's Si–O–C backbone can be degraded under acidic conditions, which could be useful for the development of responsive polymers.


 

Article Views: 955

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH