Bidirectional Photoinduced Electron-Transfer Quenching Is Observed in 4-Amino-1,8-naphthalimide-Based Fluorescent Anion Sensors
作者:Emma B. Veale、Thorfinnur Gunnlaugsson
DOI:10.1021/jo8012594
日期:2008.10.17
The synthesis and photophysical evaluations of two new fluorescent photoinduced electron-transfer (PET) anion sensors, 1 and 2, is described. These are based on 4-arnino-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. These results demonstrate that bidirectional PET sensing occurs in such naphthalimide-based anion sensors.