| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 176680 | Dyes and Pigments | 2013 | 7 Pages |
A fluorescent dye with three 1,8-naphthalimide units has been readily synthesized from 1,8-naphthalic anhydride and tris(2-aminoethyl)amine. Its photophysical properties in organic solvents with different polarity have been studied and its fluorescent sensor activity to metal ions was carefully investigated. The sensor showed high selectivity to Fe3+ by fluorescence quenching in DMF, and exhibited very good selectivity and sensitivity to Fe3+ in DMF/H2O (volume ratio 4:1 and 2:3) by easily detected fluorescence enhancement. The binding stoichiometry indicated that a 1:1 complex was formed between Fe3+ and the sensor in DMF/H2O (volume ratio 2:3). The binding mechanism was studied by IR and 1H NMR spectroscopic techniques.
► A dendrimer-type “turn-on” Fe3+ fluorescent sensor is reported. ► The sensor is both highly selective and sensitive for Fe3+. ► The detection can be carried out in aqueous DMF solutions.
