Bidirectional Photoinduced Electron-Transfer Quenching Is Observed in 4-Amino-1,8-naphthalimide-Based Fluorescent Anion Sensors.

[摘要]：The synthesis and photophys. evaluations of two new fluorescent photoinduced electron-transfer (PET) anion sensors, 1 and 2, is described. These are based on 4-amino-1,8-naphthalimide fluorophores and diarylthiourea anion receptors, connected via a methylene spacer to the imide. The sensing of acetate, phosphate, and fluoride, on all occasions, gave rise to quenching in the fluorescence of 1 and 2, similar to that seen for the structural isomer 3. Bidirectional PET sensing occurs in such naphthalimide-based anion sensors.

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