Polymer, Vol.40, No.13, 3795-3802, 1999
Synthesis and characterization of novel heteroannular benzoylferrocene polysiloxane monomers, oligomers, and polymers
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 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 H-1, C-13, Si-29 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.
Keywords:HIGH-MOLECULAR-WEIGHT;STEP-GROWTH COPOLYMERIZATION;RING-OPENING POLYMERIZATION;POLY(FERROCENYLSILANES);ALPHA;OMEGA-DIENES;FERROCENOPHANES;ACETOPHENONE;BONDS