Fluorinated Polymers: Volume 1: Synthesis, Properties, Processing and Simulation
Chapter 2: Fluoroalkylated Styrene Dimers: Synthesis, Properties, and Applications
Published:25 Oct 2016
Special Collection: 2016 ebook collectionSeries: Polymer Chemistry Series
Masato Yoshida, 2016. "Fluoroalkylated Styrene Dimers: Synthesis, Properties, and Applications", Fluorinated Polymers: Volume 1: Synthesis, Properties, Processing and Simulation, Bruno Ameduri, Hideo Sawada, Bruno Ameduri, Hideo Sawada
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Head-to-head type styrene dimers bearing two fluoroalkyl end-groups were efficiently synthesized by a simple reaction of a perfluoroalkyl iodide with styrene under radical conditions as a mixture of meso and racemic (rac) forms. The dimer is an interesting compound as the smallest model unit for fluoroalkyl end-capped oligomers and polymers for investigating the role of fluoroalkyl groups in functional materials. The isomers could be separated from each other by column chromatography and/or recrystallization. The meso form of the dimer 1 gave a crystal suitable for X-ray diffraction study and the crystal structure was found to be based on π,π-stacking of benzene rings and aggregation of fluoroalkyl chains. Among the various substituted styrene dimers on the benzene rings, 4-hydroxylated styrene dimers (2) were found to exhibit unique properties on the basis of their self-assembly. The OH groups on the benzene rings may work effectively for the self-assembly of the dimers in addition to the π,π-stacking of the benzene rings and aggregation of the fluoroalkyl chains. Especially rac-2 worked as the host molecule for inclusion of alcohols on recrystallization from hexane with a small amount of alcohol. The synthesized styrene dimers are expected to have high potential as novel fluorinated functional materials.