Signal Amplification of a “Turn-On” Sensor: Harvesting the Light Captured by a Conjugated Polymer

摘要: The system is designed so that pH alters the absorption cross-section, energy migration efficiency, and emission efficiency ofthe fluoresceinamine (FA) dye appended off of polymer 2.Inthis case, acts as a shunt, withdrawing from theconjugated polymer. At high pH, FA highly absorptive andhighly fluorescent, while at low dye’s extinction coef-ficient decreases fluorescence lost. In our case,electrostatic binding anionic 2 onto cationic surfaceformed by depositing 1 directly glass substrate provides afacile method for placing in close proximity tothe conjugated