Journal
DYES AND PIGMENTS
Volume 97, Issue 1, Pages 168-174Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2012.12.016
Keywords
Dendrimer-type; 1,8-Naphthalimide; Fluorescent sensor; Fe3+ ion; Turn-on
Funding
- National Natural Science Foundation of China [21074085]
- Open Research Foundation of the National Engineering Laboratory for Modern Silk, Soochow University [SS115801]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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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 H-1 NMR spectroscopic techniques. (C) 2012 Elsevier Ltd. All rights reserved.
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