Fluorescent conjugates polymers (CPs) are widely used in the design of fluorescent chemo- and biosensors owing to the property of these polymers to produce signal amplification after binding with analyte.  The amplification stems from the efficient photoexcitation energy migration to the sites where the binding has occurred.  The amplification phenomenon is typically observed when analyte binding produces a low energy gap fluorescent or quenching site on the CP backbone which creates a thermodynamic �sink� for the excitons to migrate to.  Another, much less explored possibility arises when an analyte binding creates a higher energy gap site on the CP backbone.  The amplification in such case is also possible but would involve a different mechanism.  This presentation will discuss recent examples which illustrate this concept, with particular focus on synthesis of representative CPs and photophysical studies of the amplification phenomenon.

Chemosensing performance of fluorescent conjugated polymers: High energy gap control of signal amplification

245th National Meeting (2013)

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