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Synfacts 2006(10): 1013-1013
DOI: 10.1055/s-2006-949364
DOI: 10.1055/s-2006-949364
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart · New York
Photocontrolled Living Polymerizations
M. Tanabe, G. W. M. Vandermeulen, W. Y. Chan, P. W. Cyr, L. A. Vanderark, D. A. Rider, I. Manners*
University of Toronto, Canada and University of Bristol, UK
Further Information
Publication History
Publication Date:
21 September 2006 (online)
Significance
The strained silicon-bridged ferrocenophane monomers are photoexcited. As a result, the Fe-Cp bond is selectively weakened as well as the electrophilicity of the Fe is increased. The excited monomers thus undergo ring-opening polymerization in a living fashion under the presence of mild anionic initiators such as Na[C5H5]. The light functions as a switch to turn on and off the polymerization. Due to its living nature, metal-containing block copolymers are easily accessible. This new protocol allows the incorporation of various functional groups, which are normally incompatible with the conventional anionic living-polymerization conditions.