[Macromolecules] Novel Hyperbranched Ferrocene-Containing Poly(boro)carbosilanes Synthesized via a Convenient “A2 + B3” Approach
作者：Jie Kong, T. Schmalz, G. Motz, AHE Mueller
關(guān)鍵字：Ferrocene
論文來(lái)源：期刊
具體來(lái)源：Macromolecules, 2011, 44 (6), pp 1280–1291, DOI: 10.1021/ma1029086
發(fā)表時(shí)間：2011年
We report the synthesis of versatile hyperbranched ferrocene-containing poly(boro)carbosilanes (hb-PBCS) via a convenient “A2 + B3” approach. Two types of hb-PBCS are obtained by the hydrosilylation of 1,1′-bis(dimethylsilyl)ferrocene (A2) with trivinylmethylsilane (B3) followed by modification with 9-borabicyclo[3.3.1]nonane (9-BBN) and by the hydroboration of 1,1′-bis(dimethylvinylsilyl)ferrocene (A2) with the borane?dimethyl sulfide complex (B3), respectively. Size exclusion chromatography (SEC) results demonstrate that the well-soluble hb-PBCS possess appreciable weight-average molecular weight (Mw,SEC) up to 62?300 g/mol with the polydispersity index (PDI) of 1.95?4.51. The combined characterization by 1H?29Si heteronuclear multiple-bond correlation (HMBC), 11B nuclear magnetic resonance (NMR), and triple-detection SEC (triple-SEC) confirms the remarkable hyperbranched architecture of hb-PBCS with degrees of branching (DB) between 0.47 and 0.79. The Mark?Houwink?Sakurada exponents of hb-PBCS obtained from triple-SEC are significantly lower (α = 0.36?0.47) than that of their linear analogue (α = 0.69).