Synthesis and characterization of novel heteroannular Benzoylferrocene (cas 1272-44-2) polysiloxane monomers, oligomers, and polymers

Add time:08/11/2019    Source:sciencedirect.com

Copoly[2,2′-bis[1,1′-ferrocene]benzoylylene/3,3,5,5-tetramethyl-4-oxa-3,5-disila-1,7-heptanylene] (III) was synthesized by two approaches. High molecular weight III was obtained by an acid catalyzed equilibrium condensation of 1,1′-bis[1-(3′,3′,5′,5′-tetramethyl-4-oxa-3,5-disilahexyl)benzoyl] ferrocene (IV), while lower molecular weight III was synthesized by the dihydridocarbonyltris(triphenylphosphine)ruthenium (Ru) catalyzed co-oligomerization of 1,1′-Benzoylferrocene (cas 1272-44-2) and 1,3-divinyltetramethyl-disiloxane. Ru catalyzed reaction of benzoylferrocene and 1,3-divinyltetramethyl-disiloxane gave 1-[2′-ferrocenoylphenethyl]-3-vinyltetramethyl-disiloxane (II), 1,3-bis[2′-ferrocenoyl phenethyl]tetramethyldisiloxane (I). The electrochemistry of I, III, and IV have been examined by cyclic voltammetry. These materials show a single reversible oxidation process. The products have been characterized by 1H, 13C, 29Si NMR, IR, UV–Vis spectroscopy, as well as elemental analysis and/or high resolution mass spectrometry with peak matching. GPC, DSC and TGA of the copolymer and co-oligomer III have been determined.

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