Polymer Library Comprising
Fluorene and Carbazole Homo- and Copolymers for Selective Single-Walled
Carbon Nanotubes Extraction
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Abstract
To date, (<i>n</i>, <i>m</i>) single-walled
carbon nanotubes (SWNTs) cannot be selectively synthesized. Therefore,
postprocessing of SWNTs including solubilization and sorting is necessary
for further applications. Toward this goal, we have synthesized a
polymer library consisting of fluorene- and carbazole-based homo-
and copolymers. Variations of the connection of these aromatics together
with the incorporation of further conjugated monomers give access
to a broad diversity of polymers. Their ability to selectively wrap
specific (<i>n</i>, <i>m</i>) species is investigated
toward HiPco SWNTs raw material which contains more than 40 (<i>n</i>, <i>m</i>) species. Absorption and fluorescence
spectroscopies were used to analyze SWNTs/polymer suspensions. These
results provide evidence for selective SWNTs/polymer interactions
and allow a more detailed assessment of polymer structure–property
relationships, thus paving the way toward custom synthesis of polymers
for single (<i>n</i>, <i>m</i>) SWNTs extraction