Abstract
Electrochemical and spectroelectrochemical studies have been performed on a (fluorene-alt-phenylene) polymer with perylenediimide pendant groups. This polymer can be p-doped by oxidation of the conjugated chain, whereas the reduction occurs on the electron-acceptor perylenediimide units. The photoluminescence of this polymer in solid state is greatly inhibited by a photoinduced electron transfer from the conjugated chain to neutral perylenediimide aggregates. Several changes have been observed in the emission from polymers upon electrochemical treatments. On the other hand, the oxidation of the main chain induces the quenching of the remaining emission from the conjugated fluorophoric main chain, whereas the emission from the side groups is not affected. Remarkably, the evolution of the emission of the perylenediimide pendant groups upon electrochemical reduction allows discrimination between aggregated and nonaggregated perylenediimide groups in the polymer. As a result of the formation of the perylenedi...
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