POLY 190 |
| Poly-9,9'-dihexylfluorenes were synthesized through the nickel – mediated Yamamoto reaction in the presence of 2-bromo-9,9'-dimethylfluorene, 2-bromotoluene, 2-bromo-N,N'-dimethylaniline and 4-bromo-N,N'-dimethylaniline end-capping agents. MALDI-TOF and NMR analyses shown that 2-bromotoluene and 4-bromo-N,N'-dimethylaniline were the most efficient end-cappers giving 83% and 86% of chains end-capped at both ends, respectively. MALDI analysis shown that the distributions of non-endcapped, mono-endcapped and bi-endcapped chains remained molecular weight independent within the examined range of molecular weights. The resedual protonation, presumably due to the work-up, is being studied. |
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General Papers: Synthesis and Characterization
6:00 PM-8:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster
Division of Polymer Chemistry |