The authors have introduced a new system for the detection of fluoride ion and successfully amplified the response using exciton migration in a semiconducting org. polymer. In contrast to most semiconductive-polymer sensor schemes that rely on changes in emission intensity, this sensory system uses a new fluorescence signal. The approach of directly interconnecting the indicator electronically with the polymer's band structure is a promising alternative to FRET schemes and the authors intend to apply this approach to other analytes of interest. [on SciFinder(R)]