Design of chemoresistive sensory materials: polythiophene-based pseudopolyrotaxanes.

TitleDesign of chemoresistive sensory materials: polythiophene-based pseudopolyrotaxanes.
Publication TypeJournal Article
Year of Publication1995
AuthorsMarsella, MJ, Carroll, PJ, Swager, TM
JournalJournal of the American Chemical Society
Keywordschemoresistive sensory material polythiophene based pseudopolyrotaxane, paraquat chemoresistive response polymer based device

The authors report conducting polymer-based sensors which transduce reversible, noncovalent, and non-redox-dependent mol. recognition events into measurable changes in cond. These chemoresistive polymers are derived from bithiophenes contg. cyclophane receptors capable of forming self-assembled pseudorotaxane complexes with paraquat. The electrostatic perturbations arising from pseudopolyrotaxane formation cause a decrease in carrier mobility and thus lower the cond. The chemoresistive response was consistent with decreased carrier mobility and exhibited an enhanced sensitivity to analyte-promoted electrostatic perturbations relative to the voltammetric response. Polymer-based devices which demonstrate a real time chemoresistive response to paraquat are also reported. [on SciFinder(R)]